Part 6 Service Diagnosis - Daikin FTXG25JV1BW Service Manual

SiBE041012_A
1. Troubleshooting with LED .....................................................................74
2. Problem Symptoms and Measures .......................................................75
3. Service Check Function ........................................................................76
4. Troubleshooting ....................................................................................79
5. Check ..................................................................................................123
Service Diagnosis
Service Diagnosis
1.1 Indoor Unit..............................................................................................74
1.2 Outdoor Unit ...........................................................................................74
4.1 Error Codes and Description ..................................................................79
4.2 Indoor Unit PCB Abnormality .................................................................80
4.3 Freeze-up Protection Control or Heating Peak-cut Control....................82
4.4 Fan Motor (DC Motor) or Related Abnormality.......................................84
4.5 Thermistor or Related Abnormality (Indoor Unit)....................................86
4.6 Front Panel Open / Close Fault..............................................................87
4.7 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......88
4.8 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............90
4.9 Outdoor Unit PCB Abnormality...............................................................91
4.10 OL Activation (Compressor Overload) ...................................................93
4.11 Compressor Lock ...................................................................................94
4.12 DC Fan Lock ..........................................................................................95
4.13 Input Overcurrent Detection ...................................................................96
4.14 Four Way Valve Abnormality..................................................................97
4.15 Discharge Pipe Temperature Control.....................................................99
4.16 High Pressure Control in Cooling .........................................................100
4.17 Compressor System Sensor Abnormality ............................................101
4.18 Position Sensor Abnormality ................................................................103
4.19 DC Voltage / Current Sensor Abnormality (25/35 Class) .....................106
4.20 CT or Related Abnormality (50 Class)..................................................107
4.21 Thermistor or Related Abnormality (Outdoor Unit)...............................109
4.22 Electrical Box Temperature Rise..........................................................111
4.23 Radiation Fin Temperature Rise ..........................................................113
4.24 Output Overcurrent Detection ..............................................................115
4.25 Refrigerant Shortage ............................................................................117
4.26 Low-voltage Detection or Over-voltage Detection................................120
4.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) .......122
5.1 Thermistor Resistance Check ..............................................................123
5.2 Fan Motor Connector Check ................................................................124
5.3 Power Supply Waveforms Check.........................................................124
5.4 Electronic Expansion Valve Coil Check ...............................................125
5.5 Four Way Valve Performance Check ...................................................126
5.6 Inverter Unit Refrigerant System Check...............................................126
5.7 "Inverter Checker" Check .....................................................................127
5.8 Rotation Pulse Check on the Outdoor Unit PCB ..................................129
5.9 Installation Condition Check.................................................................130
5.10 Discharge Pressure Check...................................................................130
5.11 Outdoor Fan System Check .................................................................131
Part 6
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