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Solaredge Inverter Troubleshooting - PartsXP

solaredge inverter troubleshooting

Need to troubleshoot SolarEdge inverter? You can do this by yourself without the help of a repair expert. But, you have to reach the right place to get the solution for SolarEdge inverter problems and solve it yourself with less money. However, you have reached the right place, i.e., PartsXP. Here, we have updated the SolarEdge troubleshooting guide. Follow the below procedure to troubleshoot your inverter system so that it will work as previously.

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SolarEdge Inverter Error Codes

Here is a list of fault codes of a SolarEdge Inverter. Some of the common error codes will be displayed on your system's screen. So, the following are the common errors and possible causes that could occur with your system.

Single Phase SolarEdge Inverter

Error Code


32, 41

AC voltage is too low

31, 33

AC voltage is too high


AC frequency is too high


No country selected


AC frequency too low


Fault due to Isolation

150, 151

Arc fault has been detected


The temperature is too high

27, 153

Error caused by hardware

Three Phase Inverter

Error Code



AC voltage is too low


AC voltage is too high


AC frequency is too high


No country selected


AC frequency too low


Fault due to Isolation

150, 151

Arc fault has been detected


Over Temperature


Error caused by hardware

ABB Single and Three Phase

Error Code



Internal communication error


Input overcurrent

E014, E056



Output overcurrent

E009, E0024

Internal error


Bulk overvoltage


Input overvoltage


Internal parameters error


Leakage current fail


Fault with fan

E025, E037

Low insulation resistance


Arc fault detected          


Inverter fail

Fronius - Single Phase and Three Phase Inverter

Error Code



AC voltage is too low


AC voltage is too high


AC frequency is too high


No AC grid


Very low AC frequency


Fault of Isolation


Arc fault has been detected


The temperature is too high


Error caused by internal hardware


Current is High


Isolation error on the solar modules


Internal error

SMA Single Phase & Three Phase SolarEdge Inverters

Error Code


101, 103, 202, 203, 205, 301, 401, 501, 601  

Grid fault

3301, 3302, 3303

Unstable operation


Failure of grid

3401 to 3402

DC overvoltage


DC output is low

3801, 3802

DC is high


Insulation failure




External fan fault

7201, 7202, 7303, 7305, 7307, 7311

Displayed due to internal error

Troubleshooting a SolarEdge Inverter

First, you have to check the functionality of SolarEdge inverter simply with the following steps.

  1. Find out the black circular switch on the inverter. Once found it, make sure to point it to the "ON" position.
  1. After that, you need to locate the red switch on the system.

Check where this switch is located. This switch should be placed in the gap between the two halves of the system. Although, the switch needs to be pointed to the 1 position.

  1. Have a look at the SolarEdge inverter's little screen

Check whether the green power production indicator light on or not. Or, look at any information displayed on the system's screen. If you see, it's great – that’s only we want it.

  1. To know that your device is working properly, you need to find out the green button and it should be in the middle of the red and green buttons. Check it once.
  1. Now, check the inverter's little screen and press the green button of it. You need to continue the process of pressing it until you see "[S_OK] ON" on the display. It may appear at the lower right-hand corner. If you are not getting the message on display, then call a technician to fix it.

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SolarEdge Inverter Faults and Fixes

You need to shut down and restart the inverter as well as the solar PV system before starting of identifying and resolving the faults. However, you may not have the manuals or any other schematics till now. That's why we are here to help you through the SolarEdge inverter troubleshooting process.

VLL Max or V-Line Max 

This error code indicates that the inverter is measuring a high voltage of a grid to the parameters that the device has been set to an operating point. It if persists, you can consult SolarEdge customer service to check whether the problem is with the inverter or grid.

V-Line Min or VLL Min 

It means the system is measuring its grids voltage is too low than the safe operating voltage. It is occurring and other local circuits having main power, then you have to check all isolators, RCDs and MCBs. These are all should be "ON" at the AC side of the solar PV system. If these are in the "Off" position, leave them and try to fix it with the authorized service person.

AC Overcurrent - I-ACDC L1/ L2/ L3 

It indicates that the system's AC has been detected as high than the permissible range. The inverter will monitor the grid and reconnect when the current is in its range.

Grid Sync Error

The inverter is no longer in grid parallel operation due to the frequency fluctuations from an unstable grid connection and it has stopped sometimes for safety operation.


These are the errors that occurred due to the internal problems. It persists, shut down the system safely, and restart it again once.

F-L1/L2/L3 Min 1/2/3

This error occurred when the inverter measures the grid frequency as too low. For this situation, check whether local circuits have mains power or not and then check all isolators, RCDs, MCBs are "ON "on the solar PV system.

F-L1/L2/L3 Max 1/2/3

The inverter is measuring the grid's frequency as too high than the permissible range. If it persists, call an engineer to fix the issue.

Islanding-Active or Islanding-Passive or Islanding Trip 1/2

This error can be caused by mains failure, i.e., power cut. So, check all the connections if other local items have mains power.


This error comes when the temperature within the inverter is too hot. This can be caused by many factors such as, when the system is exposed to direct sunlight, when it is installed without adequate ventilation around the chassis, due to an internal component fault or due to blocked vent. So, you need to take the help of a service person to troubleshoot this.

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If the inverter measuring too low temperature, then it will display. In the UK, it is possible unlikely.

Main error 

When the inverter measure grid voltage or impedance that is too high or too low, the main error will occur.


This error persists during normal operation of the device and when a surge current to ground is detected on the DC side of the inverter. This error is an indication of serious or sudden fault or damage to the DC side of the system. However, you should shut down safely and inspect for any faults or damages. If you feel it as safe, then connect one DC string to restart the system. Still, the problem persists, contact an engineer to identify the source and issue fixing.

Pairing failed

When the inverter is unable to connect with some optimizers, it will happen. It may be done in low light levels and itself improve when conditions reached a normal stage. If there are sufficient sunlight and the system still does not find some or all optimizers, find non-reporting optimizers with the help of an LCD.

String Voltage: 0V 

If your system is installed correctly and has operated without problems before, then the problem is with panels, optimizers, or inverter. We recommend you test the DC side including the inverter. Due to this type of issue, there could be string voltage lesser or higher than the number of optimizers.

Arc fault detected

The inverter will measure this arc problem on the DC side when cables or connectors are damaged or incorrectly connected causing current to arc through the air. Visit the engineering store to rectify the problem.

Night Mode 

The inverter normally enters into the night mode when the sunlight reaches below the required level to power the system. Sometimes the system will be stuck in the night mode when it would normally operate. Then, this might be an indication of damage or fault at the DC side of the inverter like with panels, optimizers, etc. Also, you check built-in isolators which are placed under the inverter are "ON".

In addition to the above, there are some internal errors within the inverter. They include Temp Sensor fault, DC Injection (Line 1/2/3), Fan Failure, SW Error, Hardware Error, Measurement Error, Faulty AC Relay, RCD Sensor, and Error. Additionally, UDC Max, UDC Min, Arc detector self-test failed, RCD Test, Controller 3 Error, Tz Over current 1/2/3, SE Communication, Communication Error, RSD Error, Unbalanced DC Voltage, etc. To fix these errors, first, try to troubleshoot yourself. If not possible, call an engineer to solve error code problems.

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By using the SolarEdge monitoring app, you can perform a remote operation using your mobile. Also, you can know the most updated data directly from your android device.


That’s all about the SolarEdge troubleshooting guide. If you have any further queries, you can leave a comment in the below box. Moreover, PartsXP selling SolarEdge inverters, power optimizers, and many more products. So, if you want to purchase any SolarEdge systems, buy from our store online whatever you need. We promise that we will provide you reliable service.

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