Daikin FTK24AXVJU - Part 5 Service Diagnosis

DAMA-SM-21-001
Part 5 Service Diagnosis 53
1. General Problem Symptoms and Check Items .....................................54
2. Troubleshooting with LED .....................................................................55
2.1 Indoor Unit..............................................................................................55
2.2 Outdoor Unit ...........................................................................................55
3. Error Diagnosis .....................................................................................56
3.1 To enter error diagnosis .........................................................................56
4. Troubleshooting ....................................................................................57
4.1 Error Codes and Description ..................................................................58
4.2 Indoor Unit PCB Abnormality .................................................................59
4.3 Freeze-up Protection Control .................................................................60
4.4 Indoor Fan Motor (DC Motor) or Related Abnormality ...........................61
4.5 Thermistor or Related Abnormality (Indoor Unit)....................................62
4.6 Thermistor or Related Abnormality (Indoor Unit)....................................63
4.7 Low-voltage Detection or Over-voltage Detection..................................64
4.8 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)......65
4.9 Installation error......................................................................................67
4.10 Outdoor Unit PCB Abnormality...............................................................68
4.11 OL Activation (Compressor Overload) ...................................................69
4.12 Compressor Lock ...................................................................................71
4.13 DC Fan Lock ..........................................................................................72
4.14 Input Overcurrent Detection ...................................................................73
4.15 Discharge Pipe Temperature Control.....................................................74
4.16 High Pressure Control in Cooling ...........................................................75
4.17 Compressor System Sensor Abnormality ..............................................77
4.18 Position Sensor Abnormality ..................................................................78
4.19 Thermistor or Related Abnormality (Outdoor Unit).................................79
4.20 Electrical Box Temperature Rise............................................................81
4.21 Radiation Fin Temperature Rise ............................................................82
4.22 Output Overcurrent Detection ................................................................83
4.23 Four Way Valve Abnormality..................................................................85
5. Actuator Check......................................................................................87
5.1 Thermistor Resistance Check ................................................................87
5.2 Power Supply Waveform Check.............................................................88
5.3 Electronic Expansion Valve Check.........................................................88
5.4 Four Way Valve Performance Check .....................................................89
5.5 Inverter Unit Refrigerant System Check.................................................90
5.6 Rotation Pulse Check on the Outdoor Unit PCB ....................................90
5.7 Installation Condition Check...................................................................91
5.8 Discharge Pressure Check.....................................................................91
5.9 Outdoor Fan System Check ...................................................................92
5.10 Main Circuit Short Check........................................................................92
5.11 Power Module Check .............................................................................94
Part 5
Service Diagnosis