Si18-201
Troubleshooting - Split Type Indoor Unit
Service Diagnosis
243
1.5.9
Signal Transmission Error (Between Indoor and Outdoor Units)
Remote
Controller
Display
U4
Indoor Unit LED
Display
A
5
B
3
Note:
No LED Display on FTK(X)25/35J Series.
Method of
Malfunction
Detection
The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is
checked whether it is normal.
Malfunction
Decision
Conditions
When the data sent from the outdoor unit cannot be received normally, or when the content of
the data is abnormal.
Supposed
Causes
"
Faulty outdoor unit PCB.
"
Faulty indoor unit PCB.
"
Indoor unit-outdoor unit signal transmission error due to wiring error.
"
Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.
"
Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection
wires between the indoor and outdoor units (wire No. 2).
Troubleshooting
Check No.13
Refer to P.308
Check the outdoor unit's
LED A.
Check the indoor unit-outdoor
unit connection wires.
YES
YES
Correct the indoor unit-
outdoor unit connection
wires.
Diagnose the outdoor unit.
Replace the connection
wires between the indoor
and outdoor units.
Replace indoor unit PCBs
(1) and (2).
(PCB (1) for FTK(X)25/35J)
Locate the cause of the
disturbance of the power
supply waveform, and
correct it.
Is there any wiring error?
NO
(MF009)
Is LED A flashing?
Is the voltage 0 V?
NO
Check No. 13
Check power supply
waveform.
Check the voltage of the indoor
unit-outdoor unit connection
wires between No. 1 and No. 2,
and between No 2 and No. 3.
YES
YES
NO
Is there any disturbance?
NO
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...