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 first time to install, please check if the “+” and “-“ of DC terminals connecting inversely.
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 time to install, check if AC wires are well connected and null line , firing line and earth line have one-to-one correspondence.
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.
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.
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.
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.
