FoxESS error codes explained

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

A solar string or the battery appears to be connected with positive and negative swapped.

What you can do

• Do not touch any DC wiring
• Call us or a licensed electrician

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

A solar string or the battery appears to be connected with positive and negative swapped.

What you can do

• Do not touch any DC wiring
• Call us or a licensed electrician

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

What you can do

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

H1(G2)/AC1(G2) hybrid & AC-coupled (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

What you can do

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

What you can do

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

What you can do

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

What you can do

• Do not open the battery
• Note the alarm and time
• Call us. FoxESS directs these to the battery supplier (your installer)

H1(G2)/AC1(G2) hybrid & AC-coupled — battery (BMS) alarms · Guide only. All work must be done by a licensed electrician. Get help with this code

AC Overcurrent

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Component Current Fault

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

High Leakage Current Fault

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Static Leakage Current Fault

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Unbalanced Grid Voltage

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Frequency High

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Frequency Low

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Phase Voltage Over Limit

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Line Voltage Over Limit

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Unbalanced Inverter Current

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

High DC Component Voltage When Off-grid

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter Hardware Overcurrent

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Phase Drop Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Bus Transient Overvoltage

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Bus Differential High Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Bus Hardware Overvoltage

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Balancing Bridge Hardware Overcurrent

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT1 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT2 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT3 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Off grid command conflict

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV Relay Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

EPS Relay Fault

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

ESTOP Trigger

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Overtemperature Protection

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter Current DC Component Offset Fault

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter Current Offset Fault

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter Soft Start Timeout Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BUS Soft Start Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Abnormal Frequency Detection Value

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Leak Current CT Self-checking Fault

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Control Diagnosis Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Balancing Bridge Current Sampling Channel Fault

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground Impedance Fault

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Relay Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Low Insulation Impedance Fault

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground Relay Fault

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV Open-loop Self-checking fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV Frequency Fault Under Off-grid

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Load Overpower Fault

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV Low Voltage Fault Under Off-grid

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Redundant Detection Fault of Grid Voltage for Auxiliary DSP

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Redundant Detection Fault of Grid Frequency for Auxiliary DSP

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Redundant Detection Fault of Leak Current for Auxiliary DSP

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Arc Fault

What you can do

• Keep clear of the inverter, panels and DC cables, and do not touch any isolators
• Note the code, date and time, and check whether the alarm is still showing in the app
• If you smell burning or see smoke, get everyone out and call 000
• Call a licensed electrician or Total Solar - an arc fault means a DC wiring or connector problem that must be inspected

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV High Voltage Fault Under Off-grid

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV Overcurrent Permanent Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Permanent Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

INV SelfCheck Permanent Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Balancing Bridge Overcurrent Permanent Fault

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Control Diagnosis Permanent Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BUS Hardware Overvoltage Permanent Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BST Hardware Overcurrent Permanent Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Static Leak Current Permanent Fault

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BUS Overvoltage Permanent Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

High BUS Voltage Imbalance Permanent Fault

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Arc Permanent Fault

What you can do

• Keep clear of the inverter, panels and DC cables, and do not touch any isolators
• Note the code, date and time, and check whether the alarm is still showing in the app
• If you smell burning or see smoke, get everyone out and call 000
• Call a licensed electrician or Total Solar - an arc fault means a DC wiring or connector problem that must be inspected

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Overcurrent Permanent Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Abnormal Grid Startup Voltage

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Off-grid Running Alarm

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

AC Lightening Protector Anomaly

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Lightening Protector Anomaly

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature Sensor Alarm

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

External Fan Alarm

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Fan Alarm

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

EEPROM Write-read Alarm

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Slave to Master Communication Alarm

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Phase Change Alarm

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Over Current Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Hardware Overcurrent Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC3 Current Sampling Channel Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Overtemperature Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC1 Current Sampling

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC2 Current Sampling Channel Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Soft Start Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC transient Overvoltage Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC Average Overvoltage Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

External Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Overvoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Undervoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Charging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Discharging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Overtemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Undertemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BMS Cell Imbalance

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Hardware Protection

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Circuit Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Voltage Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature Sensor Fault

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Current Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and Main DSP

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and Auxiliary DSP

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and BMS

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and Built-in Meter

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and Grid Meter

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Board Flash Writing Fault

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

RTC Read-Write Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and HUB Board

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Solar Meter Communication Fault

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

GEN Meter Communication Fault

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between the Master and slave

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Meter's CT line fault

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Meter's Voltage line fault

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

AFCI fault lock device

What you can do

• Keep clear of the inverter, panels and DC cables, and do not touch any isolators
• Note the code, date and time, and check whether the alarm is still showing in the app
• If you smell burning or see smoke, get everyone out and call 000
• Call a licensed electrician or Total Solar - an arc fault means a DC wiring or connector problem that must be inspected

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and BMS

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Communication Fault between Communication Board and BMS

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt1 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt2 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt3 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt4 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt5 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt6 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt7 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt8 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt9 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt10 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt11 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Mppt12 High Voltage Fault

What you can do

• Do not touch the DC isolators or cables
• Note the time - this often shows on cold, very sunny mornings
• Call your installer - the panel strings may need to be checked against the inverter's limits

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT4 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT5 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT6 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT7 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT8 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT9 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT10 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT11 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Input MPPT12 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String1 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String2 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String3 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String4 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String5 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String6 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String7 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String8 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String9 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String10 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String11 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String12 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String13 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String14 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String15 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String16 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String17 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String18 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String19 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String20 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String21 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String22 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String23 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

String24 Access Fault

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Overvoltage

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Undervoltage

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Voltage Overfrequency

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Voltage Underfrequency

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Overvoltage

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Undervoltage

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Voltage Overfrequency

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Voltage Underfrequency

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Load Overvoltage

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Load Undervoltage

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Load Voltage Overfrequency

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Load Voltage Underfrequency

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Relay Short Circuit Fault

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Grid Relay Open Circuit Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Relay Short Circuit Fault

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Generator Relay Open Circuit Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Load Voltage Anomaly Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB and Inverter Communication Fault

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Overload Fault

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inconsistent Settings of Paralleled Inverters in HUB Mode

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

HUB Overtemperature

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Inconsistent Number of 485 and CAN Communications

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC1 Average Low Voltage Fault (Total battery voltage is below undervoltage value in non-charging mode)

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC2 Average Low Voltage Fault (Total battery voltage is below undervoltage value in non-charging mode)

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC3 Average Low Voltage Fault (Total battery voltage is below undervoltage value in non-charging mode)

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC1 Pre-charging Resistor Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC2 Pre-charging Resistor Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC3 Pre-charging Resistor Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Reversed Battery1 Polarity Connection Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Reversed Battery2 Polarity Connection Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Reversed Battery3 Polarity Connection Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery1 Pre-charging Relay Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery2 Pre-charging Relay Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery3 Pre-charging Relay Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC1 Self-checking Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC2 Self-checking Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BDC3 Self-checking Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery1 Input Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery2 Input Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery3 Input Fault

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

External Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Overvoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Undervoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Charging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Discharging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Overtemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Undertemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BMS Cell Imbalance

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Hardware Protection

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Circuit Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Voltage Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature Sensor Fault

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Current Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

External Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal Communication Error

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Overvoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Undervoltage Protection

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Charging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Discharging Overcurrent Protection

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Overtemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell Undertemperature Protection

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

BMS Cell Imbalance

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Hardware Protection

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Circuit Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Voltage Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature Sensor Fault

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Current Sensor Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3-Plus / P3-Plus three-phase hybrid (AU) · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid is lost.

What you can do

• Check whether the rest of your house or street has power, and check your network operator's outage map
• Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician
• Once normal power is back the inverter usually reconnects on its own within a few minutes
• If the power is normal but the alarm stays, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid voltage out of range.

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid frequency out of range.

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Three-phase system access single-phase AC.

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The grid voltage is out of range for the last 10 Minutes.

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Output current high detected by software. To upgrade to the latest software, at least ensure that the master is upgraded to 1.69 or above.

What you can do

• Make sure the system is online so it can receive updates
• Restart the system once using the owner steps in your manual
• If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

DC component is out of limit in output current.

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Output current high detected by hardware.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Bus voltage out of range detected by software. Please check whether the N line is connected to the GRID port of the inverter. To upgrade to the latest software, at least ensure that the master is upgraded to 1.69 or above.

What you can do

• Make sure the system is online so it can receive updates
• Restart the system once using the owner steps in your manual
• If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery voltage fault.

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery current high detected by software.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The isolation is failed.

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The residual current is high.

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

PV voltage out of range.

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

PV input current high detected by software.

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter temperature is high.

What you can do

• Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents
• It usually recovers once it cools down
• If it repeats often or you can hear a noisy/failed fan, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The ground connection is failed.

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Over load in on grid mode.

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Over load in off grid mode.

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery power is low.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Bus voltage out of range detected by hardware.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

PV input current high detected by hardware. Check whether PV positive and negative are connected.

What you can do

• Check solar generation in the app compared with similar days
• Do not touch the DC isolators, cables or connectors, and don't go on the roof
• If it doesn't clear by itself, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery current high detected by hardware.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between master and manager is fail.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between master and slave is fail.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The master sample detection circuit is failed.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Residual current detection device is failed.

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The inverter eeprom is fault.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The PV connection is reversed.

What you can do

• Do not touch the DC isolators, cables or connectors
• Call your installer - this points to a wiring problem that needs a licensed electrician

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery relay keeps open.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery relay keeps close.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery buck circuit mosfet is fail.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery boost circuit mosfet is fail or The relay on the battery side of the inverter is not closed. To upgrade to the latest software, at least ensure that the master is upgraded to 1.69 or above.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The eps relay is failed.

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The battery connection is reversed.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The grid relay keeps open or close.

What you can do

• Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit
• The system usually recovers by itself once the load drops
• If it keeps happening with normal loads, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between master and slave is fail.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The slave sample detection circuit is failed.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The manager eeprom is fault.

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between meter and inverter is interrupted.

What you can do

• Check the monitoring app for the alarm and whether export/consumption readings look wrong
• Restart your home router if the meter talks over Wi-Fi or LAN
• Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between BMS and inverter is interrupted.

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The communication between BMS and inverter is interrupted.

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

DIP switch at the wrong position; The communication between battery packs is interrupted.

What you can do

• Check the app - the battery may show as offline or with no state of charge
• Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise)
• If the alarm comes back, call your installer - battery communication cables must be checked by them

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery over voltage.

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery under voltage.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery charge over current.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery discharge over current.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery over temperature.

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery under temperature.

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The capacities of cells are different.

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery hardware under protection.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Bms hardware circuit fault.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery insulation fault.

What you can do

• Do not touch the panels, rooftop isolators or DC cables
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If it clears by itself once things dry out, still let us know if it keeps returning
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery voltage sensor fault.

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery temperature sensor fault.

What you can do

• Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000
• If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it
• Let the battery cool; most units recover by themselves
• If the alarm keeps returning, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery current sensor fault.

What you can do

• Turn off any very large loads that were running when the alarm appeared
• Wait - many over-current protections reset automatically
• If it keeps happening, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery relay fault.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The capacity of battery packs is different.

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The software between slaves are different.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The cell manufacture is different.

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The slave software and hardware are not match.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

The software between Master and Slave are not match.

What you can do

• Check the battery status and any extra alarms in the app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

No action for charging request.

What you can do

• Check whether the rest of your house or street has power, and check your network operator's outage map
• Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician
• Once normal power is back the inverter usually reconnects on its own within a few minutes
• If the power is normal but the alarm stays, call your installer

H3/AC3 three-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Lost Fault

What you can do

• Check whether the rest of your house or street has power, and check your network operator's outage map
• Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician
• Once normal power is back the inverter usually reconnects on its own within a few minutes
• If the power is normal but the alarm stays, call your installer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Volt Fault

What you can do

• This is usually caused by the mains supply, not the solar system
• The inverter normally reconnects by itself once grid voltage is back in range
• If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Freq Fault

What you can do

• This is caused by the mains frequency moving outside the allowed range, usually briefly
• The inverter reconnects by itself once the grid is stable
• If it keeps happening, note the times and call your installer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

10min Volt Fault

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

SW Inv Cur Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

DCI Fault

What you can do

• Restart the system once using the owner shutdown/start-up steps in your manual
• If it comes back, call your installer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

HW Inv Cur Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

SW Bus Vol Fault

What you can do

• Note the code, then restart the system once using the owner shutdown/start-up steps in your manual
• If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

Bat Volt Fault

What you can do

• Note the code and the battery state of charge shown in the app
• Let the system run - some battery voltage protections clear by themselves after charging or discharging
• If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself

KH/KA single-phase hybrid & AC-coupled · Guide only. All work must be done by a licensed electrician. Get help with this code

On for 1s, Off for 1s

What you can do

• Note the code, date and time and check the monitoring app
• Restart the system once using the owner shutdown/start-up steps in your manual if it allows
• If it comes back, call your installer

ECS series battery (ECS2900/4100 etc.) · Guide only. All work must be done by a licensed electrician. Get help with this code

=100% (shown as S LED solid; SOC LEDs 4-1: on on on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Under voltage fault (shown as S LED flashing; SOC LEDs 4-1: off off off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Over voltage fault (shown as S LED flashing; SOC LEDs 4-1: off off on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Over temperature fault (shown as S LED flashing; SOC LEDs 4-1: off off on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Under temperature fault (shown as S LED flashing; SOC LEDs 4-1: off on off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Discharge over current (shown as S LED flashing; SOC LEDs 4-1: off on off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Charge over current (shown as S LED flashing; SOC LEDs 4-1: off on on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Parallel addressing failure (shown as S LED flashing; SOC LEDs 4-1: on off off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Pre-Charge failed (shown as S LED flashing; SOC LEDs 4-1: on off off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Short circuit protection (shown as S LED flashing; SOC LEDs 4-1: on off on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

AFE communication failed (shown as S LED flashing; SOC LEDs 4-1: on off on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Module addressing failed (shown as S LED flashing; SOC LEDs 4-1: on on off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal communication failed (shown as S LED flashing; SOC LEDs 4-1: on on off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Power parallel failure (shown as S LED flashing; SOC LEDs 4-1: on on on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

PCS communication failed (shown as S LED flashing; SOC LEDs 4-1: on on on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• Check that your home Wi-Fi/internet is working and restart your router
• Wait an hour - monitoring often reconnects by itself
• If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

HVB FUSE fault (shown as S LED solid; SOC LEDs 4-1: off off off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Current sampling fault (shown as S LED solid; SOC LEDs 4-1: off off on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Module not match (shown as S LED solid; SOC LEDs 4-1: off off on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Internal total voltage sampling failed (shown as S LED solid; SOC LEDs 4-1: off on off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature sampling failed (shown as S LED solid; SOC LEDs 4-1: off on off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay adhesion (shown as S LED solid; SOC LEDs 4-1: off on on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay not close (shown as S LED solid; SOC LEDs 4-1: off on on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay drive failed (shown as S LED solid; SOC LEDs 4-1: on off off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Cell "0V" fault (shown as S LED solid; SOC LEDs 4-1: on off off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Temperature high permanent failed (shown as S LED solid; SOC LEDs 4-1: on off on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

The single voltage high permanently failed (shown as S LED solid; SOC LEDs 4-1: on off on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

SOH low protection (shown as S LED solid; SOC LEDs 4-1: on on off off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

AFE failed (UV/OV/UT/OT) (shown as S LED solid; SOC LEDs 4-1: on on off on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Charger overvoltage (shown as S LED solid; SOC LEDs 4-1: on on on off). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code

Other fault (shown as S LED solid; SOC LEDs 4-1: on on on on). Flashing S LED = alarm/protection, solid = fault.

What you can do

• This normally means the battery is low or has reached its reserve level
• Let the system recharge from solar or the grid - check the state of charge in the app
• If the battery never charges or stays at 0% for more than a day of sunshine, call your installer

EP5/EP11 battery · Guide only. All work must be done by a licensed electrician. Get help with this code