Troubleshooting - Goodwe DNS Series User Manual

6 Troubleshooting

In most situations, the inverter requires very little maintenance. However, if the inverter is not
working properly, please try the following troubleshooting solutions:
• When a problem occurs, the red (fault) LED indicator on the front panel will light up and the
LCD screen will display the type of fault. The following table lists error messages and solutions
to the faults.
Fault
Isolation Failure
Ground I Failure
Vac Failure
System
Failure
Fac Failure
Utility Loss
PV Over Voltage
Over
Temperature
Troubleshooting
1. Check the impedance between the ground and PV (+) & PV (-) .
The impedance value must be greater than 100kΩ. Make sure the
inverter is grounded.
2. Contact local service office for help if the problem still persist.
1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the
peripheral AC system.
3. When the problem is solved, reconnect the PV panel and check
the Inverter status.
4. Contact local service office for help if the problem still persist.
1. The PV Inverter will automatically restart within 5 minutes if
the grid returns to normal.
2. Make sure grid voltage conforms with the specification.
3. Make sure neutral (N) wire and PE cable are connected well.
4. Contact local service office for help if the problem still persist.
1. Not connected to the grid.
2. Check if the power grid is connected to cable.
3. Check the availability of power grid.
1. Not connected to the grid.
2. Check if the power grid is connected to cable.
3. Check the availability of power grid.
1. Check if the PV open circuit voltage is higher than or too close
to the maximum input voltage.
2. If the problem still persist when PV voltage is less than the
maximum input voltage, contact local service office for help.
1. The internal temperature is higher than normal.
2. Decrease ambient temperature.
3. Move the inverter to a cool place.
4. If the problem still exists, contact local service office for help.
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