Goodwe NS/DNS Fault Codes and Error Messages

Goodwe NS/DNS Fault Codes and Error messages are found in the Table below.

For further information on troubleshooting the Goodwe NS/DNS range of solar inverters check out the Goodwe NS/DNS solar inverter manual here.

Display		Troubleshooting
System Failure	Isolation Fail	Disconnect DC switch, take off DC connector and check the impedence between PV (+) & PV (-) to earth If impedence is less than 100 k Ohm, please check the insulation of PV string wiring to earth. If impedence is greater than 100 k Ohm, please contact your solar power system installer. Take off AC connector, measure the impedence between neutral and PE. If it is higher than 10 k Ohm, please check AC wiring.
System Failure	Ground I Fail	Disconnect the DC switch and check the insulation of PV sting wiring to earth. Reconnect the DC switch If the problem still exists, please contact your solar power system installer.
System Failure	Vac Fail	Disconnect the DC switch and take off the AC isolator. Measure the voltage between line and neutral in the connector, making sure that it conforms to the grid connected specification of the inverter. If it doesn’t conform, please check grid wiring. If it does conform, please connect AC connector and reconnect DC switch. Inverter will reconnect to the grid automatically. If the problem still exists please contact your solar power system installer.
System Failure	Fac Fail	The PV inverter will automatically restart if the grid frequency returns to normal. If the problem still exists when the grid frequency returns to normal please contact your solar power system installer.
System Failure	Utility Loss	Disconnect the DC switch. Take off the AC connector and measure the voltage between the line and neutral connector. Make sure it conforms to the grid connected specifications of the inverter. If it does not, please check if the Solar Supply Main Switch and Inverter AC isolator (if present) are on and that the grid is normal. If it does, reconnect the AC connector and DC connectors. If the problem still exists please contact your solar power system installer.
System Failure	PV Over Voltage	Disconnect the DC switch and check the PV string voltage. Making sure it does not exceed the input voltage in the inverters specification. If it does exceed the inverters input voltage please reconfigure the PV panel string. If the problem still exists please contact your solar power system installer.
System Failure	Over Temperature	Please check that installation position conforms to the inverter installation guidelines. Try to lower the surrounding temperature. Move the inverter to vents or alter the installation position. If the problem still exists please contact your solar power system installer.
Inverter Failure	Relay-Check Fail	Disconnect the DC connectors. Reconnected the DC connectors If the problem still exists please contact your solar power system installer.
	DCI High
	EEPROM R/W Fail
	SPI Fail
	DC Bus High
	GFCI Fail
System Failure	No Display	Disconnect the DC switch, unplug the DC connectors and measure the voltage of the DC string. Plug in the DC connectors and reconnect the DC switch. If the voltage is less than 70V please check the PV string configuration. If the voltage is higher than 125V and still there is no display please contact your solar power system installer.

Please Note: When sunlight is insufficient the solar inverter may continuously start up and shut down automatically due to insufficient power being generated by the solar panels. This will not lead to inverter damage. If the problem still exists when there is sufficient sunlight please call your solar power system installer.

For more information please check out the Goodwe NS/DNS solar inverter manual’s troubleshooting section. If following the steps above doesn’t fix the issue and your Goodwe NS/DNS inverter is still within the warranty period we recommend you contact your installer or supplier.

If your inverter is outside the warranty period we suggest that you contact a local professional solar power expert. If you’re in the Gold Coast or Brisbane area contact Gold Coast Power Solutions here and we will be in touch to provide you with further assistance.