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SiUS091601EA
Troubleshooting for FDMQ Series
Part 6 Service Diagnosis
150
Note
6.10 Signal Transmission Error (Between Indoor Unit and
Remote Controller)
Error Code
U5
Method of Error
Detection
In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer
if signal transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Connection of 2 main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Defective remote controller
Transmission error caused by noise
Troubleshooting
For the way to change MAIN/SUB setting of remote controllers, refer to pages 214.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Are both
remote controllers set to
MAIN?
Do(es) the
indoor unit service
monitor(s) blink?
Does
operation return to
normal when the power is
turned off
momentarily?
NO
NO
YES
YES
NO
Replace the indoor unit
PCB (control PCB).
Set 1 remote controller to
SUB; turn the power supply
off once and then back on.
When using both wired and
wireless remote controllers for
1 indoor unit, make sure to set
the wireless remote controller
to SUB.
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
Normal
NO
NO
Using
2 remote controllers
for 1 indoor unit?
YES
YES
YES
Replace the remote controller.
Return to normal?
Return to normal?
NO
Replace the indoor unit PCB.
YES
(R24590)
Содержание FTX-N Series
Страница 14: ...SiUS091601EA 9 Part 1 General Information 1 Applicable Models 10 2 Functions 11 Part 1 General Information...
Страница 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications...
Страница 132: ...Troubleshooting for FTX FVXS Series SiUS091601EA 127 Part 6 Service Diagnosis Reference Check No 01 Refer to P 181...
Страница 161: ...SiUS091601EA Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 156 Reference Check No 14 Refer to P 185...
Страница 165: ...SiUS091601EA Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 160 Reference Check No 18 Refer to P 190...
Страница 180: ...Troubleshooting for Outdoor Unit SiUS091601EA 175 Part 6 Service Diagnosis Reference Check No 19 Refer to P 191...
Страница 197: ...SiUS091601EA Check Part 6 Service Diagnosis 192 12 class 15 class Multimeter R23024 R25105 1 2 3 4 Multimeter...
Страница 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter...
Страница 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U...
Страница 228: ...Piping Diagrams SiUS091601EA 223 Part 8 Appendix 1 2 Outdoor Unit RXL09QMVJU RXL12QMVJU 9 3D100008 3D100009A...
Страница 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368...
Страница 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A...