Growatt Solar Inverter Fault Code

Error Code
Description
Solution
No AC connection
No utility grid connected or utility grid power failure
This error would normally occur during a grid failure, if you still have electricity connected to your property then check your AC isolator or circuit breaker. If both the isolator and CB are ‘on’ and the problem persists submit a maintenance service request.
AC V outrange
Utility grid voltage is out of permissible range
This could happen particularly in the summer months if there is a lot of solar in your area, if the problem persists please submit a maintenance service request.
AC F outrange
Utility grid frequency is out of range
This could happen particularly in the summer months if there is a lot of solar in your area, if the problem persists please submit a maintenance service request.
Over temperature
Temperature out of range
Restart inverter. If still present, contact Growatt. NOTE: Ensure inverter is not covered causing the inverter to overheat
PV isolation low
Insulation problem
Submit a maintenance service request
Output high DCI
Output current DC offset too high
Restart the inverter. If the problem still persists submit a maintenance service request.
Residual 1 high
Leakage current too high
Restart the inverter. If the problem still persists submit a maintenance service request.
PV voltage high
DC input voltage is exceeding the maximum tolerable value
Disconnect DC switch immediately and switch off system. Submit a maintenance service request.
Auto test failed
Auto test failed
Restart the inverter and fault will clear.
100
Voltage fault
Submit a maintenance service request.
101
Communication fault
Turn off the DC switch and make the inverter totally shut down. Turn on the DC switch to see if the error still exists. If the error persists submit a maintenance service request.
102
Consistent fault. Data received by master and slave processor are different
Turn off the DC switch and make the inverter totally shut down. Turn on the DC switch to see if the error still exists. If the error persists submit a maintenance service request.
116
EEPROM Fault
When the inverter displays Error: 116, it means there is failure in reading or writing EEPROM.
1. Check when the error appears: if in the morning, if only in the morning, contact Growatt for support.
2. If the error appears all day; (a) restart the inverter, check if the error still exists. (b) If the fault is sustained, the control board needs to be replaced. Submit a maintenance service request.
117
Relay fault
There is something wrong with the relay circuit. Restart the inverter, if the problem still persists submit a maintenance service request.
118
Init model fault
Submit a maintenance service request.
119
GCFI device damage
Something may be wrong with the GCFI device inside the inverter.
(a) Restart the invert for 2-3 times, check whether the error still exists.
(b) If the error still exists submit a maintenance service request.
120
HCT Fault
When the inverter shows Error 120 it means something is wrong with the current sensor. Restart the inverter and if the error persists submit a maintenance service request.
121
Communication fault, master processor can’t receive data from slave processor
See error 101 and 102.
122
Bus voltage fault
Submit a maintenance service request.
Residual I High Error: 201
Leakage current too high
1. Restart the invert.
2. If error message still exists, contact Growatt.
PV Voltage High Error: 202
The DC input voltage is exceeding the maximum tolerable value.
1. Disconnect the DC switch immediately.
2. Check the voltage of each PV string with multimeter.
3. If the voltage of PV string is lower than 550V, contact Growatt.
PV Isolation Low Error: 203
Insulation problem
1. Check if panel enclosure ground properly.
2. Check if inverter ground properly.
3. Check if the DC breaker gets wet.
4. Check the impedance of PV (+) & PV (-) between ground (must be more than 25 KΩ or 550 KΩ(VDE 0126)). If the error message is displayed despite the above checking passed, contact Growatt.
AC V Outrange Error: 300
Utility grid voltage is out of permissible range.
Please switch off DC switch.
Check AC wiring, especially neutral and ground wire. Check grid voltage is complied with local grid standard. Restart inverter, if problem still exist, Contact Growatt.
No AC connection Error: 302
No AC connection
Check AC wiring. Check the status of AC breaker
AC F Outrange Error: 304
Utility grid frequency out of permissible range.
Please switch off DC switch.
Check AC wiring, especially neutral and ground wire. Check grid frequency is complied with local grid standard. Restart inverter, if problem still exist, Contact Growatt.
PE abnormal Error: 303
Voltage of Neutral and PE above 30V.
1. Check the voltage of Neutral and PE.
2. Check AC wiring.
3. Restart inverter, if error message still exisits,contact Manufacturer
Auto Test Failed Error: 407
Auto test didn’t pass.
Restart inverter, repeat Auto Test, if problem still exist, contact Growatt.
Warning 203
PV1 or PV2 Circuit short
Check the PV panel polarity.
Restart the inverter. If the warning still exist, please contact Growatt customer service to replace the POWER board.
Warning 204
Dryconnect function abnormal
1.After shutdown,Check the dry Dryconnect wiring.
2.If the error message still exists, contact manufacturer.
Warning 205
PV1 or PV2 boost broken
Restart the inverter. If the warning still exist, please contact Growatt customer service to replace the power board.
Warning 207
USB over-current
1: Unplug the U disk or monitor.
2: Re-access U disk or monitor after shutdown.
3.If the error message still exists, contact manufacturer.
Warning 401
Inverter communicates with Meter abnormal
Meter abnormal 1: Check if the meter is on 2: Check the inverter and the meter connection is normal
Warning 404
EEPROM abnormal
Restart the inverter. If the warning still exist, please contact Growatt customer service to replace the M3 board.
Warning 405
Firmware version is not consistent
Update the right version firmware.
Error: 402
Output High DCI
Restart inverter, if problem still exist, Contact Growatt.
Error: 404
Bus sample fault
Restart inverter, if problem still exists, Contact Growatt.
Error: 405
Relay fault
Restart inverter, if problem still exists, contact Growatt.
Error: 408
Over Temperature
If the ambient temperature of inverter is lower than 60°C, restart inverter, if error message still exists, contact Growatt.
Error: 409
Bus over voltage
Restart inverter, if problem still exist, contact Growatt.
Error: 411
DSP communicates with M3 abnormal
Restart inverter, if problem still exist, update the DSP&M3 firmware;
Change DSP board or M3 board, if problem still exist, contact Growatt.
Error: 414
EEPROM fault.
Restart inverter, if problem still exists, contact Growatt.
Error: 417
The data sampled by the DSP and redundant M3 is not the same.
Restart inverter, if problem still exists, contact Growatt.
Error: 420
GFCI fault.
Restart inverter, if problem still exists, change power board, or contact Growatt.

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