SiBE121021_C
v Table of Contents
5.3 Fan Motor or Related Abnormality .......................................................311
5.4 Thermistor or Related Abnormality (Indoor Unit)..................................314
5.5 Front Panel Open / Close Fault (FTXG and CTXG Series)..................315
5.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ....316
5.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit) .............318
6. Troubleshooting for SA Indoor Unit - FFQ, FCQ,
FDBQ, FBQ, FHQ Series ....................................................................319
6.1 Indoor Unit PCB Abnormality ...............................................................319
6.2 Drain Water Level System Abnormality................................................320
6.3 Fan Motor or Related Abnormality .......................................................322
6.4 Swing Motor Lock (FHQ Series)...........................................................324
6.5 Drain System Abnormality....................................................................325
6.6 Thermistor or Related Abnormality.......................................................326
6.7 Remote Controller Thermistor Abnormality ..........................................328
6.8 Signal Transmission Error
(between Indoor Unit and Remote Controller)......................................329
6.9 Signal Transmission Error
(between MAIN Remote Controller and SUB Remote Controller)........330
6.10 Field Setting Abnormality .....................................................................331
7. Troubleshooting for Outdoor Unit........................................................333
7.1 Anti-icing Function................................................................................333
7.2 Outdoor Unit PCB Abnormality.............................................................335
7.3 OL Activation (Compressor Overload) .................................................336
7.4 Compressor Lock .................................................................................337
7.5 DC Fan Lock ........................................................................................338
7.6 Input Overcurrent Detection .................................................................339
7.7 Discharge Pipe Temperature Control...................................................340
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
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