• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

Relay-Check Fail DCI High EEPROM R/W Fail SPI Fail DC Bus High GFCI Fail

• Disconnect the DC connectors.
• Reconnected the DC connectors
• If the problem still exists please contact your solar power system installer.