SiBE121135
248
Service Diagnosis
Part 6
Service Diagnosis
1. Troubleshooting with LED ...................................................................250
1.1
Indoor Unit............................................................................................250
1.2
Outdoor Unit .........................................................................................252
2. Problem Symptoms and Measures .....................................................253
3. Service Check Function ......................................................................254
3.1
RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS, FLXS,
FDXS Series.........................................................................................254
3.2
SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ, FBQ Series .....................263
4. Code Indication on Remote Controller ................................................267
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