Frequently Asked Questions - Goodwe HT Series User Manual

6 Frequently Asked Questions

Normally, the inverter requires no maintenance. If the inverter cannot work normally, refer to the
following instructions:
When something is wrong, the red indicator on the operation panel will light up, and relevant
information will be listed on the APP. Refer to the table below for more details.
Type Error Message
Isolation Failure
Gnd I Fail
Grid voltage
abnormality
System
Errors
Fac Failure
Utility Loss
PV Over Voltage
1. Disconnect the DC switch and remove the DC connector, then
check the impedance of the positive and negative poles of the DC
connector to the earth.
2. If the impedance is lower than 100 kilohm, check the impedance of
the PV string to the earth.
3. If the impedance is higher than 100 kilohms, call the local service
center.
4. Remove the AC connector and check the impedance of the N wire
to the earth wire. If higher than 10 ohms, check the AC connection.
1. Disconnect the DC switch and check the insulation of the PV string
to the earth.
2. Turn on the DC switch after checking.
3. Call the local service center if the fault resists.
1. Disconnect the DC switch and open the AC junction box to measure
the voltage on the live wires and between the live wires in the
connector. To confirm whether the voltage matches with the grid-tied
inverter specifications.
2. If it does not match, check the network cables.
3. If it matches, connect the AC connector and turn on the DC switch.
The inverter will recover automatically. Call the local service center if
the fault resists.
1. If the grid frequency returns to a normal state, the inverter will
automatically recover.
2. Call the local service center if the fault resists.
1. Disconnect the DC switch and open the AC junction box to measure
the voltage on the live wires and between the live wires in the
connector. To confirm whether the voltage matches with the grid-tied
inverter specifications.
2. If not, check whether the distribution switch is turned off and
whether the power supply is operating normally.
3. If it matches, connect the AC connector and turn on the DC switch.
The inverter will recover automatically. Call the local service center if
the fault resists.
1. Disconnect the DC switch and remove the DC connector to measure
the PV string voltage. Confirm whether it exceeds the inverter input
voltage specification.
2. If yes, reconfigure the PV string.
3. If not and the fault persists, call the local service center.
Error Message
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