SiBE121135
Service Diagnosis
249
7.4
Unspecified Voltage (between Indoor Unit and Outdoor Unit) /
Anti-icing Function in Other Rooms......................................................301
7.5
Anti-icing Function................................................................................302
7.6
Outdoor Unit PCB Abnormality.............................................................304
7.7
OL Activation (Compressor Overload) .................................................305
7.8
Compressor Lock .................................................................................306
7.9
DC Fan Lock ........................................................................................307
7.10 Input Overcurrent Detection .................................................................308
7.11 Discharge Pipe Temperature Control...................................................309
7.12 High Pressure Control in Cooling .........................................................310
7.13 Compressor Sensor System Abnormality ............................................311
7.14 Position Sensor Abnormality ................................................................313
7.15 CT or Related Abnormality ...................................................................315
7.16 Thermistor or Related Abnormality (Outdoor Unit) ...............................317
7.17 Electrical Box Temperature Rise..........................................................319
7.18 Radiation Fin Temperature Rise ..........................................................321
7.19 Output Overcurrent Detection ..............................................................323
8. Check ..................................................................................................325
8.1
Thermistor Resistance Check ..............................................................325
8.2
Fan Motor Connector Check ................................................................326
8.3
Hall IC Check .......................................................................................327
8.4
Indoor Electronic Expansion Valve Coil Check ....................................327
8.5
Power Supply Waveform Check...........................................................328
8.6
Outdoor Electronic Expansion Valve Check.........................................329
8.7
Four Way Valve Performance Check ...................................................330
8.8
Inverter Unit Refrigerant System Check ...............................................330
8.9
“Inverter Checker” Check .....................................................................331
8.10 Rotation Pulse Check on the Outdoor Unit PCB ..................................332
8.11 Installation Condition Check.................................................................333
8.12 Discharge Pressure Check...................................................................333
8.13 Outdoor Fan System Check .................................................................334
8.14 Capacitor Voltage Check......................................................................334
8.15 Power Module Check ...........................................................................335
