46

Symptom: DXG-18, DXH-18, MGC-18 – ERROR CODE H7

Solution: MULTIPLE SOLUTIONS

Cause: DESYNCHRONIZING 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) IMPROPER INPUT VOLTAGE:

SOLUTION 1) CHECK IF THE VOLTAGE IS TOO LOW. IF YES, PLEASE ADJUST IT

2) THE SYSTEM PRESSURE IS NOT OK:

SOLUTION 2) CHECK IF THE SYSTEM PRESSURE IS NORMAL OR NOT. ALSO, CHECK THE REFRIGERANT LEVEL, IT COULD BE EXCESSIVE

3) DEFECT OF OUTDOOR UNIT CONTROLLER:

SOLUTION 3) REPLACE WITH A NEW CORRESPONDING PCB

4) DEFECT OF THE COMPRESSOR:

SOLUTION 4) REPLACE WITH A NEW CORRESPONDING COMPRESSOR

5) THE FAN MOTOR IS MALFUNCTIONING:

SOLUTION 5) REPLACE WITH A NEW CORRESPONDING FAN MOTOR

6) THE RADIATOR IS MALFUNCTIONING:

SOLUTION 6) REPLACE WITH A NEW CORRESPONDING RADIATOR