9 Troubleshooting and Maintenance User Manual
70
Grid power outage,
AC switch or circuit
is disconnected.
Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:
1. Check whether the grid supplies power
reliably.
2. Check whether the AC cable is firmly in
place.
3. Check whether the AC cable is connected
to the correct terminal (whether the live wire
and the N wire are correctly in place).
4. Check whether the AC circuit breaker is
connected.
5. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Wait for the inverter to return to normal.
Disconnect the AC and DC switches, and
reconnect the AC and DC switches 15
minutes later to restart the inverter.
If the fault still exists, contact Sungrow
Service.
Excessive leakage
current
1. The fault can be caused by poor sunlight or
damp environment, and the inverter will be
reconnected to the grid after the environment
is improved.
2. If the environment is normal, check
whether the AC and DC cables are well
insulated.
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Grid abnormal, the
grid voltage or
frequency is out of
the permissible
range, and the
inverter cannot be
connected to the
grid normally.
Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:
1. Measure the actual grid frequency, and
contact the local electric power company for
solutions if the grid parameter exceeds the
set value.
2. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
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