17 May 43

Symptom: DXG-18, DXH-18, MGC-18 – ERROR CODE H5

Solution: MULTIPLE SOLUTIONS

Cause: IPM PROTECTION

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 WIRING OF THE COMPRESSOR IS NOT OK:

SOLUTION 1) CHECK IF THE WIRING OF THE COMPRESSOR IS CONNECTED PROPERLY, AND CHECK IF THERE IS A MISMATCH BETWEEN THE ELECTRIC BOX AND COMPRESSOR

2) SOMEONE TURNS OFF THE UNIT AND THEN TURNS THE UNIT BACK ON BEFORE THE COMPRESSOR STOPPED FOR 3 MINUTES:
SOLUTION 2) CHECK IF THE STOP DURATION OF THE COMPRESSOR IS LONGER THAN 3 MINUTES

3) LOW VOLTAGE:

SOLUTION 3) CHECK IF THE VOLTAGE IS TOO LOW. IF YES, PLEASE ADJUST IT

4) NORMAL OVERLOAD PROTECTION:

SOLUTION 4) CHECK IF LOADING IS TOO HEAVY. IF YES, IT IS THE NORMAL OVERLOAD PROTECTION

5) SYSTEM IS NOT OK:

SOLUTION 5) CHECK IF THERE IS EXCESSIVE REFRIGERANT, IF THE PIPELINE IS BLOCKED OR IF THE EVAPORATOR OR CONDENSER IS DIRTY

6) DEFECT OF THE OUTDOOR CONTROLLER:

SOLUTION 6) CHECK IF THE OUTDOOR PCB HAS A DEFECT. IF YES, PLEASE REPLACE IT WITH A CORRESPONDING PART

7) DEFECT OF THE COMPRESSOR:

SOLUTION 7) CHECK IF THE COMPRESSOR IS DAMAGED. IF YES, PLEASE REPLACE IT WITH A CORRESPONDING PART

8) INDOOR AND OUTDOOR FANS ARE RUNNING ABNORMALLY:

SOLUTION 8) CHECK IF THE INDOOR AND OUTDOOR FANS ARE RUNNING NORMALLY

9) SYSTEM PRESSURE IS TOO HIGH:

SOLUTION 9) CHECK IF THE SYSTEM PRESSURE IS TOO HIGH. IF YES, PLEASE ADJUST IT