Daikin FVXG25K2V1B Service Manual page 4

Part 6 Service Diagnosis............................................................. 69
1. Troubleshooting with LED .....................................................................71
2. Problem Symptoms and Measures .......................................................72
3. Service Check Function ........................................................................73
4. Troubleshooting ....................................................................................76
5. Check ..................................................................................................121
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2.1 Names of Parts.......................................................................................46
2.2 Preparation before Operation.................................................................50
2.3 AUTO · DRY · COOL · HEAT · FAN Operation ......................................52
2.4 RADIANT Operation...............................................................................53
2.5 Temperature Setting...............................................................................54
2.6 Adjusting the Airflow Direction and Rate ................................................55
2.7 POWERFUL Operation ..........................................................................57
2.8 OUTDOOR UNIT QUIET Operation.......................................................58
2.9 ECONO Operation .................................................................................59
2.10 OFF TIMER Operation ...........................................................................60
2.11 ON TIMER Operation .............................................................................61
2.12 WEEKLY TIMER Operation ...................................................................62
2.13 Quick Reference.....................................................................................68
1.1 Indoor Unit..............................................................................................71
1.2 Outdoor Unit ...........................................................................................71
4.1 Error Codes and Description ..................................................................76
4.2 Indoor Unit PCB Abnormality .................................................................77
4.3 Freeze-up Protection Control or Heating Peak-cut Control....................79
4.4 Fan Motor (DC Motor) or Related Abnormality.......................................81
4.5 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve
(Motor Operated Valve) Abnormality, Freeze-up Protection Control......83
4.6 Thermistor or Related Abnormality (Indoor Unit)....................................85
4.7 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......86
4.8 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............88
4.9 Outdoor Unit PCB Abnormality...............................................................89
4.10 OL Activation (Compressor Overload) ...................................................91
4.11 Compressor Lock ...................................................................................92
4.12 DC Fan Lock ..........................................................................................93
4.13 Input Overcurrent Detection ...................................................................94
4.14 Four Way Valve Abnormality..................................................................95
4.15 Discharge Pipe Temperature Control.....................................................97
4.16 High Pressure Control in Cooling ...........................................................98
4.17 Compressor System Sensor Abnormality ..............................................99
4.18 Position Sensor Abnormality ................................................................101
4.19 DC Voltage / Current Sensor Abnormality (25/35 Class) .....................104
4.20 CT or Related Abnormality (50 Class)..................................................105
4.21 Thermistor or Related Abnormality (Outdoor Unit)...............................107
4.22 Electrical Box Temperature Rise..........................................................109
4.23 Radiation Fin Temperature Rise ..........................................................111
4.24 Output Overcurrent Detection ..............................................................113
4.25 Refrigerant Shortage ............................................................................115
4.26 Low-voltage Detection or Over-voltage Detection................................118
4.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) .......120
5.1 Thermistor Resistance Check ..............................................................121
SiBE061121
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