Goodwe ETC Series User Manual page 48

09 Maintenance
DC-AC conversion module fault
No. Fault
1 GFCICheckFault
2 HCTCheckFault
3 DcPreChgRlyFault
4 GFCIFailure
5 RelayFailure
6 HCTCheckFault
7 NoUtility
Cause
The leakage
current sensor is
abnormal.
The sampling
of the AC HCT is
abnormal.
The input
precharge relay is
abnormal.
The input
insulation
resistance
becomes low
when the inverter
is working.
1. The relay is
abnormal or
short-circuited.
2. The control
circuit is
abnormal.
3. The AC cable
connection
is abnormal,
like a virtual
connection or
short circuit.
The sampling
of the AC HCT is
abnormal.
1. Utility grid
power fails.
2. The AC cable is
disconnected,
or the AC
breaker is
disconnected.
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User Manual V1.0-2023-04-30
Solutions
Disconnect the AC output switch and DC
input switch, then connect them 5 minutes
later. Contact the dealer or the after-sales
service if the problem persists.
Disconnect the AC output switch and DC
input switch, then connect them 5 minutes
later. Contact the dealer or the after-sales
service if the problem persists.
Disconnect the AC output switch and DC
input switch, then connect them 5 minutes
later. Contact the dealer or the after-sales
service if the problem persists.
1. If the problem occurs occasionally, it
may be caused by a cable exception.
The inverter will recover automatically
after the problem is solved.
2. Check whether the resistance between
the PV string and PE is too low if the
problem occurs frequently or persists.
Disconnect the AC output switch and DC
input switch, then connect them 5 minutes
later. Contact the dealer or the after-sales
service if the problem persists.
Disconnect the AC output switch and DC
input switch, then connect them 5 minutes
later. Contact the dealer or the after-sales
service if the problem persists.
1. The alarm is automatically cleared after
the grid power supply is restored.
2. Check whether the AC cable is
connected and the AC breaker is on.