Error Code |
Description |
Troubleshooting |
|---|---|---|
No AC connection (302)
|
No utility grid connected or utility grid power failure
|
Check AC isolator or circuit breaker. If both are ON and issue persists, submit a maintenance service request
|
AC V outrange (300)
|
Utility grid voltage is out of permissible range
|
Switch off DC switch. Check AC wiring, especially neutral/ground. Restart inverter. If problem persists, contact Growatt.
|
AC F outrange (304)
|
Utility grid frequency is out of range
|
Switch off DC switch. Check AC wiring and grid frequency. Restart inverter. If problem persists, contact Growatt.
|
Over temperature (408)
|
Temperature out of range
|
Ensure inverter is not covered. Restart inverter. If issue persists and temp < 60°C, contact Growatt
|
PV isolation low (203)
|
Insulation problem
|
Check panel/inverter grounding. Check DC breaker for moisture. Measure impedance. If still faulty, contact Growatt.
|
Output high DCI (402)
|
Independent operation detected
|
Restart inverter. If error remains, contact Growatt.
|
Residual I high (201)
|
Leakage current too high
|
Restart inverter. If error remains, contact Growatt.
|
PV voltage high (202)
|
DC input voltage exceeds max tolerance
|
Disconnect DC switch immediately. Check PV voltage with multimeter. If <550V and issue persists, contact Growatt.
|
Auto test failed (407)
|
Auto test didn’t pass
|
Restart inverter. If problem persists, contact Growatt.
|
100
|
Voltage fault
|
Submit a maintenance request to installer.
|
101
|
Communication fault
|
Shut down inverter fully by turning off DC switch. Restart. If error persists, submit a maintenance request.
|
102
|
Master and slave processor data mismatch
|
Same as Error 101. Shut down and restart inverter. Submit request if error persists.
|
116
|
EEPROM fault
|
If error occurs all day, restart inverter. If error continues, control board may need replacement. Contact Growatt.
|
117 / 405
|
Relay fault
|
Restart inverter. If problem remains, submit a service request.
|
118
|
Init model fault
|
Submit a maintenance request to installer.
|
119 / 420
|
GCFI device damage / GFCI fault
|
Restart inverter 2–3 times. If error persists, contact Growatt. May require power board replacement.
|
120
|
HCT fault (Current sensor issue)
|
Restart inverter. If issue remains, contact Growatt.
|
121
|
Master processor not receiving data from slave
|
Same as Error 101 & 102.
|
122
|
Bus voltage fault
|
Submit a maintenance request to installer.
|
PE abnormal (303)
|
Voltage between Neutral and PE above 30V
|
Check wiring and Neutral-PE voltage. Restart inverter. If issue remains, contact manufacturer.
|
Warning 203
|
PV1 or PV2 Circuit short
|
Check PV polarity. Restart inverter. If warning persists, contact Growatt to replace power board.
|
Warning 204
|
Dryconnect function abnormal
|
After shutdown, check Dryconnect wiring. Contact manufacturer if warning remains.
|
Warning 205
|
PV1 or PV2 boost broken
|
Restart inverter. If issue persists, contact Growatt to replace power board.
|
Warning 207
|
USB over-current
|
Unplug USB/monitor. Reconnect after shutdown. If issue remains, contact manufacturer.
|
Warning 401
|
Inverter-Meter communication abnormal
|
Ensure meter is ON and properly connected to inverter.
|
Warning 404 / Error 414
|
EEPROM abnormal
|
Restart inverter. If issue persists, replace M3 board or contact Growatt.
|
Warning 405
|
Firmware version mismatch
|
Update firmware to correct version.
|
Error 404
|
Bus sample fault
|
Restart inverter. If issue remains, contact Growatt.
|
Error 409
|
Bus over-voltage
|
Restart inverter. If issue remains, contact Growatt.
|
Error 411
|
DSP-M3 communication issue
|
Restart inverter. If persists, update DSP & M3 firmware or replace DSP/M3 board.
|
Error 417
|
DSP and redundant M3 sampling data mismatch
|
Restart inverter. If issue persists
|