Signal Transmission Error (Between Main Remote Controller And Sub Remote Controller) - Daikin FFQ09Q2VJUFFQ12Q2VJUFFQ15Q2VJUFFQ18Q2VJURX09QMVJURX12QMVJURX15QMVJURX18QMVJU Service Manual

Troubleshooting
4.10 Signal Transmission Error (Between MAIN Remote
Controller and SUB Remote Controller)
U8
Error Code
Method of Error 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.
Detection
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
Causes
Troubleshooting
Note: For the way to change MAIN/SUB setting of remote controllers, refer to pages 122 and 123.
73
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
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Using 2 remote
controllers for 1
indoor unit?
YES
Are both remote
controllers set to
SUB?
YES
Is the
NO
remote controller
set to MAIN?
YES
NO
SiUS091628EA
NO
Set the remote controller to
MAIN; turn the power supply off
and then back on.
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.
(R24058)
Service Diagnosis