Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE U3 Solution: MULTIPLE SOLUTIONS Cause: DC BUS VOLTAGE DROP MALFUNCTION 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) SUPPLY VOLTAGE IS UNSTABLE:SOLUTION...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE PL Solution: MULTIPLE SOLUTIONS Cause: DC BUS VOLTAGE IS TOO LOW 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 INPUT SUPPLY...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE EU Solution: MULTIPLE SOLUTIONS Cause: LIMITED/DECREASED FREQUENCY DUE TO HIGH TEMPERATURE OF MODULE Remarks: DESCRIPTION:ALL SYSTEMS OPERATE NORMALLY, WHILE THE OPERATION FREQUENCY FOR THE COMPRESSOR IS DECREASED.REPAIR:1) THE WIRE CONNECTION OF THE RADIOTOR IS NOT OK (LOOSE):SOLUTION 1) CHECK IF THE RADIATOR...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE U7 Solution: MULTIPLE SOLUTIONS Cause: THE 4-WAY VALVE IS ABNORMAL Remarks: DESCRIPTION: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...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE U9 Solution: MULTIPLE SOLUTIONS Cause: ZERO-CROSSING MALFUNCTION OF OUTDOOR UNIT 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 SUPPLY VOLTAGE IS...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE FH Solution: MULTIPLE SOLUTIONS Cause: LIMITED/DECREASED FREQUENCY DUE TO ANTIFREEZING Remarks: DESCRIPTION:ALL SYSTEMS OPERATE NORMALLY, WHILE THE OPERATION FREQUENCY FOR THE COMPRESSOR IS DECREASED.REPAIR:1) POOR AIR RETURN IN INDOOR UNIT:SOLUTION 1) IF THE AIR RETURN OF INDOOR UNIT IS POOR, PLEASE MAKE...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE L3 Solution: MULTIPLE SOLUTIONS Cause: MALFUNCTION OF OUTDOOR FAN/MALFUNCTION OF DC MOTOR Remarks: DESCRIPTION:*AC UNIT IN COOLING/DRY MODE: ALL LOADS STOP OPERATING WHILE THE INDOOR FAN WILL CONTINUE TO OPERATE. *AC UNIT IN HEATING MODE: THE COMPLETE UNIT STOPS OPERATION.REPAIR:1) WIRING IS...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE L9 Solution: MULTIPLE SOLUTIONS Cause: OVERPOWER PROTECTION Remarks: DESCRIPTION:*AC UNIT IN COOLING MODE: THE COMPRESSOR AND OUTDOOR FAN STOP OPERATING WHILE THE INDOOR FAN WILL CONTINUE TO OPERATE. REPAIR:1) OVERPOWER DUE TO OVERLOADING:SOLUTION 1) THIS IS A NORMAL PROTECTION. CHECK IF THE...
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...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE LP Solution: MULTIPLE SOLUTIONS Cause: MISMATCH PROTECTION OF INDOOR AND OUTDOOR UNITS Remarks: DESCRIPTION:*AC UNIT IN HEATING MODE: THE COMPRESSOR, OUTDOOR UNIT AND INDOOR UNIT STOP OPERATION.REPAIR:1) MODELS OF INDOOR AND OUTDOOR UNIT DO NOT MATCH:SOLUTION 1) CHANGE TO A NEW CORRECT...