Signal Transmission Error; (Between Indoor Unit And Remote Controller); Signal Transmission Error (Between Indoor Unit And Remote Controller) - Daikin Super Multi NX FFQ25B8V1B Service Manual

SiBE121021_C
6.8 Signal Transmission Error (between Indoor Unit and
Remote Controller)
U5
Remote
Controller
Display
Method of Microcomputer checks if transmission between indoor unit and remote controller is normal.
Malfunction
Detection
Malfunction The error is generated when the micro-processor detects that the transmission between the
Decision indoor unit and the remote controller is not normal over a certain amount of time.
Conditions
Supposed
Causes
Troubleshooting
Replace the remote controller.
Replace the indoor unit PCB.
Service Diagnosis
Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series
Defective remote controller
Defective indoor unit PCB
External cause (noise...)
Connection of 2 master remote controllers (when using 2 remote controllers)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
YES
Using 2 remote
controllers?
NO
All indoor PCB
NO
microcomputer monitors
blink?
YES
YES
Return to normal?
NO
YES
Return to normal?
NO
Is SS1 of
YES
both remote controllers
set to "MAIN"?
NO
Operation
NO
returns to normal when
the power is turned off
momentarily.
YES
Set one remote controller to
"SUB"; turn the power supply off
once and then back on.
Replace the indoor unit PCB.
There is possibility of
malfunction caused by noise.
Check the surrounding area and
turn on again.
Normal
Normal
There is possibility of
malfunction caused by noise.
Check the surrounding area and
turn on again.
(R13008)
329