Daikin FFQ50B9V1B - Not a Malfunction of the Air Conditioner; The system does not operate; The system operates but it does not sufficiently cool or heat; Noise of air conditioners

SiBE121135
Table of Contents iv
4.1 RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS,
FDXS Series.........................................................................................267
4.2 SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series .....................267
4.3 Sub Codes for SA Indoor Unit..............................................................268
4.4 Outdoor Unit .........................................................................................269
5. Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS,
FLXS, FDXS Series ............................................................................270
5.1 Indoor Unit PCB Abnormality ...............................................................270
5.2 Freeze-up Protection Control or Heating Peak-cut Control..................272
5.3 Fan Motor or Related Abnormality .......................................................274
5.4 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve
(Motor Operated Valve) Abnormality, Freeze-up Protection Control
(FVXG Series Only)..............................................................................278
5.5 Thermistor or Related Abnormality (RA Indoor Unit)............................280
5.6 Front Panel Open / Close Fault (FTXG Series Only) ...........................281
5.7 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ....282
5.8 Unspecified Voltage (between Indoor Unit and Outdoor Unit) .............283
6. Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ,
FBQ Series..........................................................................................284
6.1 Indoor Unit PCB Abnormality ...............................................................284
6.2 Drain Water Level System Abnormality................................................285
6.3 Fan Motor or Related Abnormality .......................................................287
6.4 Swing Motor Lock (FHQ Series Only) ..................................................289
6.5 Drain System Abnormality....................................................................290
6.6 Thermistor or Related Abnormality (SA Indoor Unit)............................291
6.7 Remote Controller Thermistor Abnormality ..........................................292
6.8 Signal Transmission Error
(between Indoor Unit and Remote Controller)......................................293
6.9 Signal Transmission Error
(between MAIN Remote Controller and SUB Remote Controller)........294
6.10 Field Setting Abnormality .....................................................................295
7. Troubleshooting for Outdoor Unit........................................................296
7.1 Refrigerant Shortage ............................................................................296
7.2 Low-voltage Detection or Over-voltage Detection................................298
7.3 Signal Transmission Error (on Outdoor Unit PCB)...............................300
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