THIS DEFECT MOSTLY OCCURS WHEN THE AC UNIT IS HEATING. THE COMPLETE UNIT WILL STOP OPERATING.
REPAIR:
1) SUPPLY VOLTAGE IS TOO LOW:
SOLUTION 1) IF THE VOLTAGE IS LOWER THAN 175V, PLEASE ADD A VOLTAGE REGULATOR
2) WIRING TERMINAL OF 4-WAY VALVE IS LOOSE OR BROKEN:
SOLUTION 2) CHECK IF THE WIRING CONNECTION OF THE FOUR-WAY VALVE IS OK OR NOT. IF NOT, PLEASE ADJUST IT
3) THE 4-WAY VALVE IS MALFUNCTIONING:
SOLUTION 3) REPLACE IT WITH A NEW CORRESPONDING 4-WAY VALVE
4) THE PCB IS MALFUNCTIONING:
SOLUTION 4) REPLACE IT WITH A NEW CORRESPONDING PCB