FoxESS H3-Plus / P3-Plus three-phase hybrid (AU) error codes explained

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