Part 6 Service Diagnosis - Daikin K-Series Service Manual

SiBE061121.book Page 69 Friday, April 22, 2011 4:12 PM
SiBE061121
1. Troubleshooting with LED .....................................................................71
2. Problem Symptoms and Measures .......................................................72
3. Service Check Function ........................................................................73
4. Troubleshooting ....................................................................................76
5. Check ..................................................................................................119
Service Diagnosis
Service Diagnosis
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....................78
4.4 Fan Motor (DC Motor) or Related Abnormality.......................................80
4.5 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve
(Motor Operated Valve) Abnormality, Freeze-up Protection Control......82
4.6 Thermistor or Related Abnormality (Indoor Unit)....................................84
4.7 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......85
4.8 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............86
4.9 Outdoor Unit PCB Abnormality...............................................................87
4.10 OL Activation (Compressor Overload) ...................................................89
4.11 Compressor Lock ...................................................................................90
4.12 DC Fan Lock ..........................................................................................91
4.13 Input Overcurrent Detection ...................................................................92
4.14 Four Way Valve Abnormality..................................................................93
4.15 Discharge Pipe Temperature Control.....................................................95
4.16 High Pressure Control in Cooling ...........................................................96
4.17 Compressor System Sensor Abnormality ..............................................97
4.18 Position Sensor Abnormality ..................................................................99
4.19 DC Voltage / Current Sensor Abnormality (25/35 Class) .....................102
4.20 CT or Related Abnormality (50 Class)..................................................103
4.21 Thermistor or Related Abnormality (Outdoor Unit)...............................105
4.22 Electrical Box Temperature Rise..........................................................107
4.23 Radiation Fin Temperature Rise ..........................................................109
4.24 Output Overcurrent Detection ..............................................................111
4.25 Refrigerant Shortage ............................................................................113
4.26 Low-voltage Detection or Over-voltage Detection................................116
4.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) .......118
5.1 Thermistor Resistance Check ..............................................................119
5.2 Fan Motor Connector Check ................................................................120
5.3 Power Supply Waveforms Check.........................................................120
5.4 Electronic Expansion Valve Coil Check ...............................................121
5.5 Four Way Valve Performance Check ...................................................122
5.6 Inverter Unit Refrigerant System Check...............................................122
5.7 "Inverter Checker" Check .....................................................................123
5.8 Rotation Pulse Check on the Outdoor Unit PCB ..................................124
5.9 Installation Condition Check.................................................................126
5.10 Discharge Pressure Check...................................................................126
Part 6
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