Part 6 Service Diagnosis - Daikin 3MKS50E3V1B Service Manual

1. Troubleshooting with LED ...................................................................250
2. Problem Symptoms and Measures .....................................................253
3. Service Check Function ......................................................................254
4. Code Indication on Remote Controller ................................................267
5. Troubleshooting for RA Indoor Unit - FTXG, FTXS, CTXS, FVXG, FVXS,
6. Troubleshooting for SA Indoor Unit - FCQG, FFQ, FHQ, FDBQ,
7. Troubleshooting for Outdoor Unit........................................................296
248
Service Diagnosis
1.1 Indoor Unit............................................................................................250
1.2 Outdoor Unit .........................................................................................252
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
4.1 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
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
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
7.1 Refrigerant Shortage ............................................................................296
7.2 Low-voltage Detection or Over-voltage Detection................................298
7.3 Signal Transmission Error (on Outdoor Unit PCB)...............................300
SiBE121135
Part 6
Service Diagnosis