If your Growatt inverter displays an error, refer to the table below for possible causes and solutions.
Common Errors & Solutions
| Error Code | Description | Solution |
|---|---|---|
| No AC connection | No utility grid detected or power failure. | This error typically occurs during a grid failure. If your property still has power, check your AC isolator or circuit breaker. If both are ‘ON’ and the issue persists, submit a maintenance service request. |
| AC V outrange | Grid voltage is outside the permissible range. | This may occur, especially during summer when solar generation is high in your area. If the issue continues, submit a maintenance service request. |
| AC F outrange | Grid frequency is outside the permissible range. | Similar to the voltage issue, this can happen due to high solar activity in your region. If the problem persists, request maintenance service. |
| Over Temperature | Inverter temperature is too high. | Restart the inverter. Ensure the inverter is not covered or installed in a confined space, which can cause overheating. If the issue persists, contact Growatt Support. |
| PV Isolation Low | Possible insulation issue. | Submit a maintenance service request to diagnose and fix the issue. |
| Output High DCI | DC output current offset is too high. | Restart the inverter. If the issue remains, request maintenance service. |
| Residual 1 High | Leakage current is too high. | Restart the inverter. If the problem persists, submit a maintenance request. |
| PV Voltage High | DC input voltage exceeds the safe limit. | Immediately disconnect the DC switch and power off the system. Submit a maintenance request. |
| Auto Test Failed | Auto self-test did not pass. | Restart the inverter; the fault should clear. If not, submit a maintenance service request. |
Technical Error Codes & Solutions
| Error Code | Issue | Solution |
|---|---|---|
| 100 | Voltage fault. | Submit a maintenance request. |
| 101 | Communication fault. | Turn off the DC switch and allow the inverter to fully shut down. Turn it back on and check if the error persists. If it does, request maintenance. |
| 102 | Data inconsistency between master and slave processors. | Follow the same steps as Error 101. If unresolved, submit a maintenance request. |
| 116 | EEPROM fault (reading/writing failure). | – If the error appears only in the morning, contact Growatt Support. – If the error occurs all day, restart the inverter. If the fault remains, the control board may need replacement. Submit a maintenance request. |
| 117 | Relay circuit malfunction. | Restart the inverter. If the problem persists, request maintenance. |
| 118 | Initialization mode fault. | Submit a maintenance request. |
| 119 | GCFI device damage (Ground Fault Circuit Interrupter). | Restart the inverter 2-3 times. If the error persists, submit a maintenance request. |
| 120 | HCT (Current Sensor) fault. | Restart the inverter. If the issue continues, request maintenance. |
| 121 | Communication failure – master processor not receiving data from the slave processor. | See troubleshooting steps for Errors 101 & 102. |
| 122 | Bus voltage fault. | Submit a maintenance request. |
Need Further Assistance?
If your Growatt inverter displays a code you don’t understand or one that persists, please submit a maintenance request here. If you require the manufactures guide you can access this via Growatt. Our friendly experts can provide the solutions you need to maintain a reliable and safe solar system. If you need an easy guide to setting up Wi-Fi on your Growatt inverter click here.
