User Manual 10 Troubleshooting and Maintenance
65
For Battery Side
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.
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.
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.
1. Check whether polarities of the connected battery
are reversed
2. If the fault still exists, please contact Sungrow
Service.
If the fault occurs repeatedly, please contact Sungrow
Service.
Check if the SPD is loose or damaged. If it is damaged,
replace the lightning arrester.
Restart the PCS. If the fault persists, please contact
Sungrow Service.
When the fault is stopped, the PCS will restart
automatically. If the fault occurs frequently, please
contact customer service.
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.
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.
To Next Page
