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SiBE12-816_D
Service Diagnosis
196
7.11 Thermistor or Related Abnormality (Outdoor Unit)...............................247
7.12 Electrical Box Temperature Rise..........................................................249
7.13 Radiation Fin Temperature Rise ..........................................................250
7.14 Output Overcurrent Detection ..............................................................252
7.15 Refrigerant Shortage ............................................................................254
7.16 Low-voltage Detection or Over-voltage Detection................................256
7.17 Outdoor Unit PCB Abnormality or Signal Transmission Error ..............257
7.18 Unspecified Voltage (between Indoor Unit and Outdoor Unit) /
Anti-icing control in Other Room ..........................................................260
8. Check ..................................................................................................261
8.1
Thermistor Resistance Check ..............................................................261
8.2
Fan Motor Connector Output Check ....................................................262
8.3
Hall IC Check .......................................................................................262
8.4
Power Supply Waveforms Check.........................................................262
8.5
Electronic Expansion Valve Check.......................................................263
8.6
Four Way Valve Performance Check ...................................................264
8.7
Inverter Unit Refrigerant System Check...............................................265
8.8
“Inverter Checker” Check .....................................................................266
8.9
Rotating Pulse Input on the Outdoor Unit PCB Check .........................268
8.10 Installation Condition Check.................................................................269
8.11 Discharge Pressure Check...................................................................269
8.12 Outdoor Unit Fan System Check..........................................................270
8.13 Main Circuit Short Check......................................................................270
8.14 Power Module Check ...........................................................................271