1. Get the basic information:
Model, serial number, error code, how often the error happens, installation & commissioning date,
2. Other steps to be taken:
2.1. Restart and check. If the inverter can back to normally working, case over. If not, please move to the next step.
2.2. Contact after-sales people of Ginlong. Please provide the Model and its serial number to them at the same time.