Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE E5 Solution: CHECK CORRECT USE OF PCB Cause: INDOOR UNIT MISMATCHED WITH OUTDOOR UNIT Remarks: DESCRIPTION:TEST CODE SENT FROM OUTDOOR UNIT PCB DOES NOT MATCH THE TEST JIG.REPAIR:1) CHECK WHETHER THE PCB IS USED CORRECTLY...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P1 Solution: MULTIPLE SOLUTIONS Cause: UNDERVOLTAGE OR OVERVOLTAGE PROTECTION Remarks: DESCRIPTION:1) THERE IS A VOLTAGE TEST CIRCUIT ON THE OUTDOOR UNIT PCB. WHEN THE AC VOLTAGE TESTS Vó145V, THE MCU WILL PREVENT THE UNIT TO START UP. IF THE UNIT ALREADY STARTED...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P2 Solution: MULTIPLE SOLUTIONS Cause: OVERCURRENT PROTECTION Remarks: DESCRIPTION:WHEN THE AC UNIT HAS MORE CURRENT THAN THE MAXIMUM ALLOWABLE CURRENT, THE UNIT WILL STOP OPERATING AND THE P2 ERROR CODE WILL BE DISPLAYED.REPAIR:1) IT IS A NORMAL PROTECTION IF THE CURRENT IS...
Symptom: DXF-19, DXH-19, MGC-19 - ERROR CODE E1 Solution: MULTIPLE SOLUTIONS Cause: INDOOR/OUTDOOR UNIT COMMUNICATION ERROR Remarks: DESCRIPTION:THE INDOOR UNIT HAS NOT RECEIVED FEEDBACK FROM THE OUTDOOR UNIT FOR 110 SECONDS, FOR 4 CONSECUTIVE TIMES.REPAIR:1) TURN POWER OFF, THEN RESTART THE UNIT AFTER 2 MINUTES:DOES A PROBLEM REMAIN? NO...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P4 Solution: MULTIPLE SOLUTIONS Cause: OUTDOOR UNIT DISCHARGE PIPE OVERTEMPERATURE PROTECTION Remarks: DESCRIPTION:WHEN THE DISCHARGE TEMPERATURE IS MORE THAN T DEGREES CELCIUS (110 DEGREES CELCIUS FOR EXAMPLE), THE OUTDOOR PCB WILL SWITCH OFF THE AC UNIT AND DISPLAYS THE P4 ERROR CODE.REPAIR:1)...
Symptom: DXF-19, DXH-19, MGC-19 - ERROR CODE E2 Solution: MULTIPLE SOLUTIONS Cause: ZERO CROSSING SIGNAL DETECTION ERROR Remarks: DESCRIPTION:WHEN PCB DOES NOT RECEIVE ZERO CROSSING SIGNAL FEEDBACK FOR 4 MINUTES OR THE ZERO CROSSING SIGNAL TIME INTERVAL IS ABNORMAL.REPAIR:1) CHECK THE CONNECTIONS AND POWER SUPPLY:IS IT NORMAL?NO = CORRECT...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P5 Solution: MULTIPLE SOLUTIONS Cause: SUBCOOLING PROTECTION ON COOLING MODE Remarks: DESCRIPTION:ON COOLING OR DRY MODE, WHEN THE INDOOR UNIT EVAPORATOR COIL TEMPERATURE IS IPT...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE P7 Solution: PCB REPLACEMENT OF OUTDOOR UNIT Cause: CIRCUIT MALFUNCTION OF MODULE TEMPERATURE SENSOR 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)...
Symptom: DXG-18, DXH-18, MGC-18 - ERROR CODE P8 Solution: MULTIPLE SOLUTIONS Cause: MODULE OVERHEATING 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 WIRE CONNECTION OF THE RADIATOR...
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...