Frequently Asked Questions - Goodwe HT Series User Manual

6 Frequently Asked Questions

Under normal conditions, the inverter requires no maintenance. If the inverter cannot work
normally, refer to the following instructions:
• When a problem occurs, the red light on the operation panel will light up, and relevant
information will be displayed on the APP. See the table below for details, and the content in
brackets provides the interpretation.
Type Display
1. Disconnect the DC switch, remove the DC connector, and
measure the impedance between the positive and negative
poles of the DC connector and the ground.
2. If the impedance is lower than 100 kilohms, check the
Isolation Failure
insulation of the PV string wiring to the earth.
3. If the impedance is higher than 100 kilohms, call the local
service department.
4. Remove the AC connector and measure the impedance of
the N wire to the ground wire. If higher than 10 ohms, check
the AC wiring.
1. Disconnect the DC switch and check the insulation of the
PV string to the earth.
Ground I Failure
2. After the check is completed, close the DC switch.
3. If the problem persists, call the local service department.
1. Disconnect the AC Breaker, remove the AC connector,
measure the voltage between the live wire and the neutral
System
wire in the connector, and confirm whether it matches the
error grid-tie specifications of the inverter.
Vac Failure
2. If it does not match, check the network cable wiring.
3. If it matches, connect the AC connector and close the AC
Breaker. The inverter will automatically resume grid-tie. If the
problem persists, call the local service department.
1. If the grid frequency returns to normal state, the inverter
Fac Failure
will automatically resume grid-tie.
2. If the problem persists, call the local service department.
1. Disconnect the AC Breaker, remove the AC connector,
measure the voltage between the live wire and the neutral
wire in the connector, and confirm whether it matches the
grid-tie specifications of the inverter.
2. If not, check whether the power distribution switch is closed
Utility Loss
and whether the power supply is operating correctly.
3. If it matches, connect the AC connector and close the AC
Breaker; if the problem persists, call the local service
department.
1. Disconnect the DC switch, remove the DC connector, and
measure the PV string voltage. Confirm whether it exceeds
the inverter input voltage specification.
PV Over Voltage
2. If yes, reconfigure the PV string.
3. If not and the problem persists, call the local service
department.
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Troubleshooting
Type Display
Relay Check Failure
DC Injection High
EEPROM R/W Failure
1. Disconnect the DC switch.
Inverter
2. Close the DC switch again.
failure
3. If the fault occurs again, call the local service department.
Internal Communication
Failure
DC Bus High
GFCI Device Check Failure
No display
Other
(Indicator and
Failures display are not lit)
Note: When the sunlight is insufficient, the photovoltaic inverter may start up frequently. This is
caused by insufficient PV string power and will not cause damage to the inverter.
Troubleshooting
1. Disconnect the DC switch, remove the DC connector, and
measure the PV string voltage.
2. Insert the DC connector, and then close the DC switch.
3. If the voltage is lower than 200V, check the PV string
configuration.
4. If the voltage is higher than 200V and there is still no display,
call the local service department.
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