How to troubleshoot Air-conditioning open phase | Mitsubishi VRF | error 4102

Brand : Mitsubishi VRF model : PUCY-P400 Error code : 4102 Error code definition : Open Phase Error code definition and error detection method : An open phase of the power supply (L1 phase and L2 phase)was detected at power on. The L3 phase current is outside of the specified range. Note, The open phase of the power supply may not always be detected if a power voltage from another circuit is applied. #bonmj #airconditioner #Mitsubishi