Sungrow error codes explained

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Overfrequency Grid 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Power Outage

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Excess Leakage Current

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Abnormal

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Voltage 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

PV Reverse Connection Fault

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

PV Reverse Connection Alarm

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

PV Abnormal Alarm

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Excessively High Ambient Temperature

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Excessively Low Ambient Temperature

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Low System Insulation Resistance

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grounding Cable 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Electric 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Off-Grid 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Confrontation

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Inverter Parallel 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

BMS Communication Fault

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Abnormal Battery Connection

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery Alarm

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

943, 964, 840

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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

Battery 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

System 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code

System 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

SH3.0-6.0RS / SH5.0-6.0RS-20 single-phase hybrid · Guide only. All work must be done by a licensed electrician. Get help with this code