Sungrow SC50HV - Troubleshooting and Maintenance; Troubleshooting

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10 Troubleshooting and
Maintenance
10.1 Troubleshooting
Once a fault occurs in the PCS, the fault information can be displayed on the
APP.
Fault codes and check methods are as follows:
For PCS Side
Fault
code
Specificati
on
Troubleshooting
201
DC under
voltage
1. Check whether the external grid is abnormal during
on-grid operation
2. Check whether the load is excessively heavy during
off-grid operation
3. Check whether the battery runs normally
4. If the fault still exists, please contact Sungrow
Service.
20
DC over
voltage
1. Check whether the external grid is abnormal during
on-grid operation
2. Whether the battery is connected normally
3. Contact the service department
108
AC under
voltage
1. Check whether the grid is abnormal
2. If the fault still exists, please contact Sungrow
Service.
109
AC over
voltage
1. Check whether the grid is abnormal
2. If the fault still exists, please contact Sungrow
Service.
111
AC over
frequency
1. Check whether the grid is abnormal
2. If the fault still exists, please contact Sungrow
Service.
110
AC under
frequency
1. Check whether the grid is abnormal
2. If the fault still exists, please contact Sungrow
Service.
44
AC
contactor
fault
1. Check whether the AC relay is abnormal
2. If the fault still exists, please contact Sungrow
Service.