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Symptom: DXG-18, DXH-18, MGC-18 – ERROR CODE E4

Solution: MULTIPLE SOLUTIONS

Cause: HIGH DISCHARGE TEMPERATURE PROTECTION OF COMPRESSOR

Remarks:

DESCRIPTION:

*AC UNIT IN COOLING/DRY MODE: THE COMPRESSOR AND OUTDOOR FAN STOP WHILE THE INDOOR FAN CONTINUES TO OPERATE.

*AC UNIT IN HEATING MODE: ALL LOADS STOP OPERATION.

REPAIR:

1) THE AIRFLOW OF OUTDOOR UNIT IS POOR (OUTDOOR AIR INLET):

SOLUTION 1) CHECK IF AIRFLOW OF OUTDOOR UNIT IS POOR

2) FAN SPEED OF OUTDOOR UNIT IS TOO LOW:

SOLUTION 2) CHECK IF THE FAN SPEED OF OUTDOOR UNIT IS TOO LOW

3) THE REFRIGERANT HAS A LEAKAGE:

SOLUTION 3) CHECK IF THERE IS A LEAKAGE IN THE SYSTEM. IF YES, PLEASE REPAIR THE LEAKAGE AND REFILL REFRIGERANT

4) THE SYSTEM IS BLOCKED:

SOLUTION 4) CHECK IF THE SYSTEM IS BLOCKED. IF YES, PLEASE REMOVE BLOCKAGE

5) THE RESISTANCE OF THE DISCHARGE TEMPERATURE SENSOR IS ABNORMAL:

SOLUTION 5) CHECK IF THE RESISTANCE OF THE DISCHARGE TEMPERATURE IS ABNORMAL

6) THE OUTDOOR ELECTRIC BOX IS MALFUNCTIONING:

SOLUTION 6) CHECK IF THE ELECTRIC BOX OF OUTDOOR UNIT IS BROKEN

7) SOME AIR IS IN THE SYSTEM:

SOLUTION 7) CHECK IF THERE IS SOME AIR IN THE SYSTEM