... short circuit protectionMains modeFuse melts, and alarm is activated. (Fault indicator is on, and buzzer keep alarming), no outputBattery modeFault ... -loadMains modeKeep alarming when load is more than 110%. (Fault indicator is on, and buzzer keep alarming), no outputprotectionBattery ... modeKeep alarming when load ranges from 110% to 130%. (Fault indicator is on, and buzzer keep alarming), then switch ...