Q: The power generation of the inverter is low.
A: Check the following items:
If AC wire diameter is suitable;
Is there any error message displayed on the inverter;
If the option of inverter’s safety country is right;
If it is shielded or there is dust on the PV panels.
Q: The yellow POWER LED on inverter is blinking ceaselessly.
A: When GoodWe Wi-Fi inverter has not been configured, the yellow POWER LED should be blinking. When the Wi-Fi has been configured successfully, the yellow POWER LED should be solid. When the yellow POWER LED blinks, it means Wi-Fi configuration was not successful. Please reconfigure Wi-Fi.
Q: The red LED indicator lights are on
A: Please check the error message displayed on the inverter’s screen and then refer to the frequently ask questions and answers on the user manual to find out the relevant troubleshooting method to resolve the problem. If the problem persists, please contact your dealer or GoodWe local technical service center.
Q: The inverter doesn’t work or the screen has no display.
A: Please check if there is DC power from PV panels, and make sure the inverter itself or external DC switch is on. If it is the first installation, please check if the "+” and "-" of DC terminals are connected inversely.
Q: Does the inverter need to be earth ground?
A: The AC side of the inverter is force to earth. After the inverter is powered on, the external protection earth conductor should be kept connected.
Q: The inverter displays off power grid or utility loss.
A: If there is no voltage on the AC side of the inverter, please check below items:
Whether the grid is off
Check if AC breaker or other protection switch is off;
If it is the first installation, check if AC wires are well connected and null line , firing line and earth line have one-to-one correspondence.
Q: The inverter displays power grid voltage over limit or Vac Failure.
A: The inverter detected AC voltage beyond safety country setting range. When the inverter displays error message, please use multi-meter to measure AC voltage to check if it is too high or too low . Please refer to the power grid actual voltage to choose a suitable safety country. If it is the first time to install, check if AC wires are well connected and null line, firing line and earth line have one-to-one correspondence.
Q: The inverter displays power grid frequency over limit or Fac Failure.
A: The inverter detected AC frequency beyond safety country setting range. When the inverter displays error message, check the current power grid frequency on the inverter’s screen . Please refer to the power grid actual voltage to choose a suitable safety country.
Q: The inverter displays the insulation resistance value of PV panel to earth is too low or ISO Failure.
A: The inverter detected the insulation resistance value of PV panel to earth is too low. Please reconnect the PV panels one by one to check if the failure was caused by a single PV panel. If so, please check the PV panel’s earth and wire if it is broken.
Q: The inverter displays leakage current is too high or Ground I Failure.
A: The inverter detected the leakage current is too high. Please reconnect the PV panels one by one to make sure if the failure was caused by a single PV panel. If so , check the PV panel’s earth and wire if it is broken.
Q: The inverter displays PV panels’ voltage are too high or PV over voltage.
A: The inverter detected PV panel input voltage is too high. Please use multi-meter to measure PV panels’ voltage and then compare the value with the DC input voltage range which is on the inverter’s right side label. If the measurement voltage is beyond that range then decrease the PV panels quantity.
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