Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F7 Solution: MULTIPLE SOLUTIONS Cause: MODULE TEMPERATURE PROTECTION Remarks: DESCRIPTION:THIS IS A IPM OVERTEMPERATURE PROTECTION.REPAIR:1) CHECK THE CONDITION OF THE IPM AND THE HEAT SINK. IF THERE IS A LOOSE CONNECTION, PLEASE FIX IT2) CHECK IF THE IPM IS ABNORMAL OR NOT...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F8 Solution: MULTIPLE SOLUTIONS Cause: 4-WAY VALVE REVERSING ABNORMAL Remarks: DESCRIPTION:ON HEATING MODE, IF THE INDOOR UNIT COIL TEMPERATURE SENSOR DETECTS A ROOM TEMPERATURE LOWER THAN 5? OR MORE AFTER THE COMPRESSOR WORKS FOR 8 MINUTES, THE AC UNIT WILL DISPLAY THE...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE F9 Solution: REPLACE THE OUTDOOR UNIT PCB Cause: IPM MODULE TEMPERATURE TEST CIRCUIT FAILURE Remarks: DESCRIPTION:THE TEMPERATURE TEST CIRCUIT OF THE IPM MODULE IS ABNORMAL, IT CANNOT TEST THE TEMPERATURE AD VALUE.REPAIR:1) PLEASE REPLACE THE OUTDOOR UNIT PCB...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FA Solution: REPLACE THE OUTDOOR UNIT PCB Cause: COMPRESSOR PHASE CURRENT TEST CIRCUIT FAILURE Remarks: DESCRIPTION:1.65V BIAS VOLTAGE OF THE AMPLIFYING CICUIT FOR THE COMPRESSOR PHASE CURRENT TESTS ABNORMAL.REPAIR:1) PLEASE REPLACE THE OUTDOOR UNIT PCB...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FB Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR OVERLOAD PROTECTION ON COOLING/HEATING MODE Remarks: DESCRIPTION:THE COIL TEMPERATURE IS TOO HIGH:1. COOLING MODE: THE OUTDOOR UNIT COIL TEMPERATURE, OR2. HEATING MODE: THE INDOOR UNIT COIL TEMPERATUREWHEN THE TEMPERATURE REACHES TO THE POINT WHERE...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FC Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR HIGH POWER CONSUMPTION PROTECTION Remarks: DESCRIPTION:WHENEVER THE OUTDOOR UNIT HAS A HIGH POWER CONSUMPTION. WHEN THE POWER CONSUMPTION REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACTIVATE THE FC PROTECTION.REPAIR:1) THIS...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE FE Solution: NORMAL PROTECTION Cause: LIMITING/REDUCING FREQUENCY FOR MODULE CURRENT PROTECTION (PHASE CURRENT OF COMPRESSOR) Remarks: DESCRIPTION:WHENEVER THE COMPRESSOR HAS A HIGH PHASE CURRENT WHEN IN OPERATION.WHEN THE CURRENT REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACTIVATE THE...
Symptom: DXF-19, DXH-19, MGC-19 - ERROR CODE E3/F5 Solution: MULTIPLE SOLUTIONS Cause: FAN SPEED IS OPERATING OUTSIDE OF THE NORMAL RANGE Remarks: DESCRIPTION: WHEN THE INDOOR FAN SPEED IS TOO LOW (300RPM) FOR A CERTAIN TIME, THE UNIT WILL STOP AND THE LED WILL DISPLAY THE FAILURE (E3). WHEN...
Symptom: MGTC-20, DXTC-20, DXTH-20 - ERROR CODE P6 Solution: MULTIPLE SOLUTIONS Cause: OVERHEATING PROTECTION ON COOLING MODE Remarks: DESCRIPTION:ON COOLING OR DRY MODE, WHEN THE OUTDOOR UNIT CONDENSER COIL TEMPERATURE IS OPTò62?, THE MCU WILL SWITCH OFF THE OUTDOOR UNIT AND THE P6 ERROR CODE WILL BE DISPLAYED.REPAIR:1) CHECK...
Symptom: DXF-19, DXH-19, MGC-19 - ERROR CODE E4/E5/F1/F2/F3 Solution: MULTIPLE SOLUTIONS Cause: OPEN CIRCUIT OR SHORT CIRCUIT OF TEMPERATURE SENSOR Remarks: DESCRIPTION:IF THE SAMPLING VOLTAGE IS LOWER THAN 0.06V OR HIGHER THAN 4.94V, THE LED WILL DISPLAY THE FAILURE.REPAIR:1) CHECK THE CONNECTION BETWEEN TEMPERATURE SENSOR AND PCB:IS IT PROPERLY...