Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P8 Solution: MULTIPLE SOLUTIONS Cause: OUTDOOR OVERTEMPERATURE/UNDERTEMPERATURE PROTECTION Remarks: DESCRIPTION:WHEN THE ENVIRONMENT TEMPERATURE IS A CERTAIN CONDITION (DESCRIBED IN 1. AND 2. BELOW), THE COMPRESSOR WILL STOP WORKING. AND AFTER 200 SECONDS OF DELAY, THE INDOOR UNIT WILL DISPLAY THE P8 PROTECTION...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FP Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR ANTI-CONDENSATION PROTECTION Remarks: DESCRIPTION:WHENEVER THE INDOOR UNIT COIL TEMPERATURE IS LOWER THAN THE DEW POINT TEMPERATURE IN THE PROCESS OF ANTI-CONDENSATION WHILE IN COOLING MODE.WHEN THE TEMPERATURE REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P9 Solution: MULTIPLE SOLUTIONS Cause: COMPRESSOR DRIVING PROTECTION Remarks: DESCRIPTION:WHEN THE COMPRESSORE IS STARTING UP OR IT IS IN THE PROCESS OF OPERATION, THE OUTDOOR UNIT WILL SHUT DOWN AND SHOW THE P9 PROTECTION CODE IF:1. THE MCU CANNOT TEST THE FEEDBACK...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FU Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR ANTI-FROST PROTECTION Remarks: DESCRIPTION:WHENEVER THE INDOOR UNIT COIL TEMPERATURE IS TOO LOW (FROST).WHEN THE COIL TEMPERATURE REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACTIVATE THE FU PROTECTION.REPAIR:1) THIS IS A...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F2 Solution: MULTIPLE SOLUTIONS Cause: DISCHARGE TEMPERATURE SENSOR FAILURE PROTECTION Remarks: DESCRIPTION:IN MOST CASES, THE DISCHARGE TEMPERATURE SENSOR IS LOOSE FROM THE FIXED COPPER PIPE. AFTER THE AC UNIT IS SWITCHED ON FOR 10 MINUTES AND THE TEMPERATURE IS (ALMOST) NOT CHANGING,...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FJ Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR DISCHARGE OVERTEMPERATURE PROTECTION Remarks: DESCRIPTION:WHENEVER THE COMPRESSOR DISCHARGE TEMPERATURE IS TOO HIGH.WHEN THE DISCHARGE TEMPERATURE REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACTIVATE THE FJ PROTECTION.REPAIR:1) THIS IS A NORMAL...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F3 Solution: MULTIPLE SOLUTIONS Cause: OUTDOOR UNIT COIL TEMPERATURE FAILURE PROTECTION Remarks: DESCRIPTION:IN MOST CASES, THE OUTDOOR COIL TEMPERATURE SENSOR IS LOOSE FROM THE FIXED COPPER PIPE (ON CONDENSER). AFTER THE AC UNIT IS SWITCHED ON FOR 10 MINUTES AND THE TEMPERATURE...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FN Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR OUTDOOR UNIT AC CURRENT PROTECTION Remarks: DESCRIPTION:WHENEVER THE OUTDOOR UNIT RUNNING CURRENT IS TOO HIGH.WHEN THE RUNNING CURRENT REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACIVATE THE FN PROTECTION.REPAIR:1) THIS...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F4 Solution: MULTIPLE SOLUTIONS Cause: COOLING SYSTEM GAS FLOW ABNORMAL PROTECTION Remarks: DESCRIPTION:WHEN THE COMPRESSOR STARTS UP, THE AC UNIT WILL CHECK THE VARIATION OF THE INDOOR UNIT COIL TEMPERATURE. IF THERE IS A MISTAKE AND IT FORGETS TO OPEN THE 2-WAY...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F5 Solution: MULTIPLE SOLUTIONS Cause: PFC PROTECTION Remarks: DESCRIPTION:THIS IS A PFC OVERCURRENT PROTECTION.REPAIR:1) IF THE F5 PROTECTION CODE RANDOMLY APPEARS, IT IS A NORMAL PROTECTION THAT IS CAUSED BY POWER SUPPLY FLUCTUATIONS OR IF THE POWER SUPPLY IS ABNORMAL2) REPOWER THE...