Sungrow SC50HV User Manual

User Manual 10 Troubleshooting and Maintenance
65
For Battery Side
Fault
code
Specificati
on
Troubleshooting
39
Low
insulation
resistance
Wait for the PCS to return to normal. If the fault occurs
repeatedly:
1. Check if the ISO impedance protection value of the
PCS is too high, and confirm that it meets the
requirements.
2. Check if the battery box environment is rainy or not,
and measure whether the insulation resistance value of
the positive and negative poles of the battery box is too
low.
3. If the fault is not caused by the foregoing reasons
and still exists, contact Sungrow Service.
71
AC SPD
fault
1. Check if the SPD is loose or damaged. If it is
damaged, replace the lightning arrester.
2. If the fault is not caused by the foregoing reasons
and still exists, contact Sungrow Service.
120
Analog
offset
anomaly
1. Restart the PCS
2. Check if the internal connection is loose.
3. If the fault is not caused by the foregoing reasons
and still exists, contact Sungrow Service.
716
BAT polarity
reversed
1. Check whether polarities of the connected battery
are reversed
2. If the fault still exists, please contact Sungrow
Service.
42
AC current
imbalance
If the fault occurs repeatedly, please contact Sungrow
Service.
72
DC SPD
fault
Check if the SPD is loose or damaged. If it is damaged,
replace the lightning arrester.
121
DC soft start
fault
Restart the PCS. If the fault persists, please contact
Sungrow Service.
11
DC
component
fault
When the fault is stopped, the PCS will restart
automatically. If the fault occurs frequently, please
contact customer service.
123
Parallel
communicati
on fault
1. Try to power down and restart the PCS;
2. Check if the parallel communication line is loose;
3. If the fault is not caused by the foregoing reasons
and still exists, contact Sungrow Service.
112
AC voltage
imbalance
When the grid returns to normal, the machine will
reconnect to the grid. If the fault occurs repeatedly:
1. Measure the actual grid voltage. If the grid voltage
imbalance is indeed higher than the set value, please
contact the power company.
2. Check if setting grid voltage imbalance parameter is
reasonable in the APP.
3. If the fault is not caused by the foregoing reasons
and still exists, contact Sungrow Service.

Sungrow SC50HV Specifications

General

Brand	Sungrow
Model	SC50HV
Category	Inverter
Language	English