Operation Manual
10 Troubleshooting
49
Fault
Fan-flt
Possible
reason
Inverter internal fan fault
Measure
Check the functionality of fan after the device is voltage-free
Remark
Contact Sungrow
Fault
DC SPD flt
Possible
reason
DC SPD tripping, over-voltage protection
Measure
Replace the SPD with the same model after the device is voltage-free
Remark
Contact Sungrow
Fault
AC SPD flt
Possible
reason
AC SPD tripping, over-voltage protection
Measure
Replace the SPD with the same model after the device is voltage-free
Remark
Contact Sungrow
Fault
Mism-ac
Possible
reason
Sensor is damaged
Measure
Replace the sensor with the same model after the device is voltage-free
Remark
Contact Sungrow
Fault
Island
Possible
reason
Islanding detected
Measure
Inverter enters into anti-islanding protection state automatically
Remark
Inverter automatically reconnects to the grid once the grid becomes normal
Fault
Ctrol power supply-flt
Possible
reason
CPS (Control power supply) inside the inverter cannot work normally
Measure
-
Remark
Inverter automatically reconnects to the grid once the CPS reverts to normal and the
grid-connection requirements are fulfilled
Fault
Ctrol cabt. Temp-flt
Possible
reason
Inverter control cabinet fans fault
Measure
Check and maintain the control cabinet fan when device is voltage-free
Remark
Contact Sungrow
10.4
LCD Display Alarm Information and Troubleshooting
During warn running state, inverter can operate normally and send warn signal. User can check
the warn information through the Work state on the default menu or through the
Function->History-information->His-alarm interface to check the latest 100 history alarm
information. Inverter will recover normal operation once the alarm is removed.
