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SiBE04-101
Service Diagnosis
81
Part 6
Service Diagnosis
1. Caution for Diagnosis............................................................................82
1.1 Troubleshooting with the Operation Lamp............................................. 82
1.2 Troubleshooting with the LED Indication ............................................... 83
2. Problem Symptoms and Measures .......................................................84
3. Service Check Function ........................................................................85
3.1 ARC417 Series...................................................................................... 85
3.2 ARC423 Series...................................................................................... 86
4. Troubleshooting ....................................................................................87
4.1 Indoor Units ........................................................................................... 87
4.2 Outdoor Units ........................................................................................ 88
4.3 Faulty PCB ............................................................................................ 89
4.4 Operation Shutdown Due to High-Pressure Control
or Freeze-Up Protection (Thermistor Activation) .................................. 90
4.5 Operation Halt Due to Fan Motor (DC Motor) or Related Abnormality
[Wall Mounted Type].............................................................................. 91
4.6 Operation Halt Due to Fan Motor (AC Motor) or Related Abnormality
(Floor / Ceiling Suspended Dual Type). ................................................ 93
4.7 Operation Halt Due to Detection of Thermistor
or Related Abnormality .......................................................................... 94
4.8 Faulty Indoor Unit PCB.......................................................................... 95
4.9 Faulty Indoor Unit PCB.......................................................................... 96
4.10 Power Supply Abnormalities or Faulty Indoor PCB ............................... 97
4.11 Signal Transmission Error (between Indoor and Outdoor Units)........... 98
4.12 Faulty Indoor / Outdoor Power Supply Specification ............................. 99
4.13 Operation Halt Due to High Pressure Control
for Cooling Operation .......................................................................... 100
4.14 Operation Halt Due to Discharge Pipe Temperature Control .............. 101
4.15 Interrupt Due to OL Action or Thermal Fuse Blow-Out........................ 102
4.16 Compressor Seizing ............................................................................ 104
4.17 DC Fan Seizing ................................................................................... 105
4.18 Operation Halt Due to Detection of Input Over Current....................... 106
4.19 Operation Halt Due to Position Detection Sensor ............................... 108
4.20 Operation Halt Due to Detection of CT Error....................................... 109
4.21 Output Overcurrent.............................................................................. 110
4.22 Operation Halt Due to Thermistor Error or Disconnection Detection... 112
4.23 Operation Halt Due to Detection of Insufficient Gas............................ 113
4.24 Detection of Low Voltage (LVP) .......................................................... 115
4.25 Faulty Outdoor Unit PCB ..................................................................... 116
4.26 Faulty Outdoor Unit PCB and Transmitting/Receiving Circuit ............. 117
5. Checks ................................................................................................119
5.1 How to Check ...................................................................................... 119
SiBE04-101.book Page 81 Monday, October 15, 2001 3:08 PM