SiBE121021_C
Service Diagnosis 285
7.8 High Pressure Control in Cooling .........................................................341
7.9 Compressor Sensor System Abnormality ............................................343
7.10 Position Sensor Abnormality ................................................................345
7.11 CT or Related Abnormality ...................................................................347
7.12 Thermistor or Related Abnormality (Outdoor Unit)...............................349
7.13 Electrical Box Temperature Rise..........................................................351
7.14 Radiation Fin Temperature Rise ..........................................................353
7.15 Output Overcurrent Detection ..............................................................355
7.16 Refrigerant Shortage ............................................................................357
7.17 Low-voltage Detection or Over-voltage Detection................................359
7.18 Signal Transmission Error (on Outdoor Unit PCB)...............................360
7.19 Anti-icing Function in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units) ....................................................361
8. Check ..................................................................................................362
8.1 Thermistor Resistance Check ..............................................................362
8.2 Fan Motor Connector Check ................................................................363
8.3 Hall IC Check .......................................................................................363
8.4 Power Supply Waveform Check...........................................................363
8.5 Electronic Expansion Valve Check.......................................................364
8.6 Four Way Valve Performance Check ...................................................365
8.7 Inverter Unit Refrigerant System Check...............................................365
8.8 “Inverter Checker” Check .....................................................................366
8.9 Rotation Pulse Check on the Outdoor Unit PCB ..................................367
8.10 Installation Condition Check.................................................................368
8.11 Discharge Pressure Check...................................................................368
8.12 Outdoor Fan System Check .................................................................369
8.13 Capacitor Voltage Check......................................................................369
8.14 Power Module Check ...........................................................................369
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