41

Symptom: DXG-18, DXH-18, MGC-18 – ERROR CODE H3

Solution: MULTIPLE SOLUTIONS

Cause: OVERLOAD PROTECTION OF COMPRESSOR

Remarks:

DESCRIPTION:

*AC UNIT IN COOLING/DRY MODE: THE COMPRESSOR STOPS OPERATING WHILE THE INDOOR FAN WILL CONTINUE TO OPERATE.

*AC UNIT IN HEATING MODE: THE COMPLETE UNIT STOPS OPERATION.

REPAIR:

1) THE SYSTEM IS NOT OK:

SOLUTION 1) CHECK IF THERE IS A LEAKAGE OF REFRIGERANT, IF AN EXPANSION VALVE IS BLOCKED, IF A CONDENSER OR EVAPORATOR IS DIRTY OR IF THE WORKING CONDITION IS BAD

2) THE COMPRESSOR HAS A DEFECT:

SOLUTION 2) CHECK IF THE COMPRESSOR HAS A DEFECT. REPLACE THE COMPRESSOR IF NEEDED

3) THE WIRING OF THE OVERLOAD SWITCH IS NOT OK:

SOLUTION 3) CHECK IF THE WIRING OF THE OVERLOAD SWITCH IS LOOSE OR PULLED OFF

4) DEFECT IN THE OVERLOAD PROTECTION CIRCUIT:

SOLUTION 4) CHECK IF THERE IS A DEFECT IN THE OVERLOAD PROTECTION CIRCUIT. UNDER NORMAL CIRCUMSTANCES, THE RESISTANCE BETWEEN BOTH ENDS OF TERMINAL IS LESS THAN 1 OHM

5) THE MALFUNCTION PROTECTOR IS BROKEN

SOLUTION 5) CHECK IS THE MALFUNCTION PROTECTOR IS BROKEN. IF YES, PLEASE REPLACE WITH A NEW CORRESPONDING PART

6) THE VOLTAGE IS TOO LOW:

SOLUTION 6) CHECK IF THE SYSTEM PRESSURE IS TOO LOW. IF YES, PLEASE ADJUST IT