Goodwe ETC Series User Manual page 52

09 Maintenance
No. Fault
4 PhaseOrderFault
5 IntFanLockFault
6 GridVoltFault
Cause
The cables are
connected in a
wrong phase.
1. The power
supply to
internal fan is
abnormal.
2. Mechanical
failure
3. Aged or
damaged fans
The grid voltage
exceeds the
permissible range,
or the duration
of high voltage
exceeds the
requirement of
HVRT.
User Manual V1.0-2023-05-20
Solutions
Disconnect the AC output switch and DC input
switch and wait for 5 minutes. Then connect
the phase cables in the right way.
1. Check whether the fan is blocked.
2. 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, the
utility grid may be abnormal temporarily.
The inverter will recover automatically
after detecting that the utility grid is
normal.
2. If the problem occurs frequently, check
whether the grid voltage is within the
permissible range.
• Contact the local power company if the
grid voltage exceeds the permissible
range.
• Modify the overvoltage protection
threshold, HVRT or disable the
overvoltage protection function after
obtaining the consent of the local
power company if the grid frequency is
within the permissible range.
3. Check whether the AC breaker and the
output cables are connected securely and
correctly if the problem persists.
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