... is power-on, DI1 closed, and the indicator blinking. Simultaneously, the time of power-on ... faultWhen it errors, DI2 closed and the indicator blinkingDI3Tripping for air-switchingWhen it tripping, DI3 closed ... , and the indicator blinking1DO outputPhase-sequence fault: When the phase ... DO in the closed state, the indicator lights. multi-loops power analyzer