Troubleshooting - Goodwe ETC Series User Manual

09 Maintenance

9.4 Troubleshooting

Perform troubleshooting according to the following methods. Contact the after-sales service if
these methods do not work.
Collect the information below before contacting the after-sales service, so that the problems can
be solved quickly.
1. Inverter information like serial number, software version, installation date, fault time, fault
frequency, etc.
2. Installation environment, including weather conditions, whether the PV modules are
sheltered or shadowed, etc. It is recommended to provide some photos and videos to assist
in analyzing the problem.
3. Utility grid situation.
Monitoring unit fault
No. Fault
1 Stop Button On
Internal DSP
2 Communication
Fault
MPPT module and DC-DC conversion module fault
No. Fault
1 BusVoltOver
2 Pv Reverse Fault
3 BatRevserseConnect
Cause
The emergency
stop button on the
inverter is pressed.
The communication
between the
monitoring unit
module and one
or more of the
MPPT modules,
DC conversion
modules, or DC-
AC conversion
modules is
abnormal.
Cause
1. The PV voltage is
too high.
2. The sampling of
the inverter BUS
voltage is abnor-
mal.
The PV string is
connected reversely.
The battery is
connected reversely.
User Manual V1.0-2023-05-20
Solutions
Check whether the emergency stop button is
pressed. If the button is pressed, release it.
Contact the dealer or the after-sales service if
the problem persists.
1. Identify the module with abnormal com-
munication via the LCD.
2. Power off the inverter and unscrew the
module to replug it. Make sure that the
module is installed securely. Tighten the
screws of the module.
3. Power on the inverter and check whether
the module can work properly via LCD.
Contact the dealer or the after-sales ser-
vice if the problem persists.
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.
Check whether the PV strings are
connected reversely.
Check whether the battery is connected
reversely.
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