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Troubleshooting for FDMQ, FFQ Series
SiUS092230EA
156
Part 6 Service Diagnosis
Note
6.12 Signal Transmission Error (Between MAIN/SUB Remote
Controllers)
Error Code
U8
Method of Error
Detection
In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer
if signal transmission between MAIN remote controller and SUB remote controller is normal.
Error Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Remote controller is set to SUB when using 1 remote controller
Connection of 2 SUB remote controllers (when using 2 remote controllers)
Defective remote controller PCB
Troubleshooting
For the way to change MAIN/SUB setting of remote controllers, refer to pages 219 and 220.
Turn the power off and then
back on. If a malfunction occurs,
replace the remote controller.
Turn the power off and then
back on. If a malfunction occurs,
replace the remote controller.
Set one remote controller to
MAIN; turn the power supply off
once and then back on.
Set the remote controller to
MAIN; turn the power supply off
and then back on.
YES
NO
YES
NO
NO
YES
(R24058)
Using 2 remote
controllers for 1
indoor unit?
Are both remote
controllers set to
SUB?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Is the
remote controller set to
MAIN?
Summary of Contents for RX-W Series
Page 1: ... Applied Models Inverter Pair Heat Pump Service Manual SiUS092230EA Inverter Pair RX W Series ...
Page 207: ...SiUS092230EA Check Part 6 Service Diagnosis 201 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 209: ...SiUS092230EA Check Part 6 Service Diagnosis 203 15 18 24 class R20704 W V U DC_P1 DC_N1 ...
Page 239: ...SiUS092230EA Piping Diagrams Part 8 Appendix 233 RX24WMVJU9 3D141502 ...