Si18-201
Troubleshooting - Split Type Indoor Unit
Service Diagnosis
239
1.5.7
Faulty Power Supply or Indoor Unit PCB
(For FTK(X)25/35J)
Remote
Controller
Display
∗
or
U4
Indoor Unit LED
Display
Method of
Malfunction
Detection
1. The proper program operation of the microcomputer is checked by the program.
2. In indoor-outdoor signal communications, the indoor unit determines whether the outdoor
unit receives signals properly by detecting signals transmitted by the outdoor unit to the
indoor unit.
Malfunction
Decision
Conditions
1. When the microcomputer program does not function properly.
2. When the indoor unit determines that the indoor unit does not properly receive signals
transmitted by the outdoor unit in indoor-outdoor signal communications.
Supposed
Causes
"
Display disabled by fault power supply.
"
Faulty signal transmitting/receiving circuit in indoor printed circuit boards (1) and (2)
"
Microcomputer program is in abnormal condition due to an external factor.
• Noise.
• Momentary voltage drop.
• Momentary power failure, etc.
"
Faulty indoor unit PCBs (1) and (2).
Troubleshooting
Check the varistor of the
indoor unit PCB.
Check voltage of AC power
supply.
220 ~ 240V ±10%
YES
YES
Check the power supply,
and correct it if not proper.
Replace the varistor.
Replace the fuse.
Replace indoor PCB (1).
Does the
power supply have the rated
voltage?
NO
Is it damaged?
NO
Check the fuse of the indoor
unit PCB.
YES
Is there conductivity?
NO
(MF006)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Содержание FTX25JVEA9
Страница 9: ...Si18 201 viii Table of Contents...
Страница 71: ...Specifications Si18 201 58 Specifications...
Страница 206: ...Si18 201 Remote Controller Operations 193 1 1 2 FVX25 35KZ...
Страница 207: ...Remote Controller Si18 201 194 Operations 1 1 3 FTXD25 35KZ...
Страница 208: ...Si18 201 Remote Controller Operations 195 1 1 4 FTK FTX50 60H...
Страница 209: ...Remote Controller Si18 201 196 Operations 1 1 5 FTKD FTXD50 60 71J...
Страница 213: ...Remote Controller Si18 201 200 Operations 1 1 9 FHYC35 50 60 71K Optional Accessory BRC7C612WC...
Страница 214: ...Si18 201 Remote Controller Operations 201...
Страница 216: ...Si18 201 Remote Controller Operations 203...
Страница 217: ...Remote Controller Si18 201 204 Operations...
Страница 234: ...Si18 201 Method of Field Set Operating Test 221 2 3 Interface Adaptor for Room Airconditioner KRP928A1S...
Страница 237: ...Method of Field Set Si18 201 224 Operating Test...
Страница 262: ...Si18 201 Troubleshooting SkyAir Indoor Unit Service Diagnosis 249...
Страница 393: ...Wiring Diagrams Si18 201 380 Appendix FHYC35 50 60 71KVE9 3D005668C...
Страница 394: ...Si18 201 Wiring Diagrams Appendix 381 FHYC35 50 60 71KV1C9...
Страница 395: ...Wiring Diagrams Si18 201 382 Appendix FDYM60 03FAV1 FDYM60 03FAVAL C 3D019816D OPTION...
Страница 396: ...Si18 201 Wiring Diagrams Appendix 383 FDYM60 03FAV1C...