SolarEdge Commercial three-phase inverters error codes explained

Ground faults may occur due to insufficient insulation to the ground.

What you can do

• Keep clear - do not touch the panels, rooftop isolators, DC cables or the inverter
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If you see smoke, smell burning or hear crackling, keep everyone away and call 000
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L1 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L2 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L3 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L1 is Lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L2 is Lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L3 is Lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The SolarEdge system normally eliminates DC overvoltage errors.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The SolarEdge system normally eliminates DC overvoltage errors.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

AC grid voltage malfunction.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The SolarEdge system normally eliminates DC overvoltage errors.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

AC grid voltage malfunction. When AC voltage returns the inverter should restart after the reconnection time.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Ground faults may occur due to insufficient insulation to the ground.

What you can do

• Keep clear - do not touch the panels, rooftop isolators, DC cables or the inverter
• Note the code and whether it appears in wet weather or early morning - this helps the electrician
• If you see smoke, smell burning or hear crackling, keep everyone away and call 000
• Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Voltage Spike

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Voltage Spike

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Grid Voltage Spike

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Voltage Spike

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

DC Voltage Spike

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over 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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Under 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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Wrong AC connection

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

VDC+/- capacitors banks unbalanced

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

VNN error

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Low power

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Power train error

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Broken or unconnected temperature sensor.

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

PV solar array is not properly isolated from ground earth.

What you can do

• Keep clear - do not touch the inverter, frames or cabling
• Leave the system off if it has shut down
• If you see smoke, smell burning or hear crackling, keep everyone away and call 000
• Call a licensed electrician or Total Solar to test the earthing

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Relay Test

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

RCD Test

What you can do

• Keep clear and do not touch the inverter or cabling
• Note the code, date and time
• If you see smoke, smell burning or hear crackling, keep everyone away and call 000
• Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Test Iso Test

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Power off AC to the inverter

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Power off AC to the inverter

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Capacitor over voltage

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Capacitor over voltage

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over 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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over 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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over 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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over current

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over current

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Over current

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Driver Short

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Driver Short

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Driver Short

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Balancer Fault

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

RCD Over Current

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

EVENT_NC_TZ

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

Global Fault

What you can do

• Note the code, time and whether it clears by itself
• You may restart the system once using the owner shutdown/start-up steps in your manual. Do not open covers or touch cabling
• If the code returns or the system stays offline, call your installer - internal faults are a warranty/technician job

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L1 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L2 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L3 is higher than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L1 is Lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L2 is lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code

The frequency measured on L3 is lower than the thresholds

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

Commercial three-phase inverters · Guide only. All work must be done by a licensed electrician. Get help with this code