Transmission Error (Between Indoor Unit And Remote Control); Transmission Error (Between Indoor Unit And Remote Control) - Daikin E-Series Service Manual

SiENBE18-621
5.12 Transmission Error (between Indoor Unit and Remote
Control)
U5
Remote Control
Display
Applicable
FFQ-B, FHQ-BU
Models
Method of Microcomputer checks if transmission between indoor unit and remote control is normal.
Malfunction
Detection
Malfunction
When transmission is not carried out normally for a certain amount of time
Decision
Conditions
" Failure of remote control
Supposed
" Failure of indoor PCB
Causes
" Outside cause (noise, etc.)
" Connection of 2 master remote controls (When using 2 remote controls)
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
YES
Control by 2
remote controls
NO
All indoor unit
NO
PCB microcomputer
normal monitors
blinking
YES
Using multicore
YES
transmission wiring
between indoor unit and
remote control
NO
Is it good
YES
condition from noise
interference?
NO
Troubleshooting for SkyAir Indoor Unit
SS1 of both
YES
remote control is
set to "main."
Resets
NO
normally when power
supply is turned off
temporarily.
YES
Set one of the remote
control to"sub,"turn off
the power supply
temporarily, then restart
operation.
Indoor unit PCB
replacement
Malfunction could be
produced by noise.
Check the surrounding
area and restart
operation.
Change to double-core
independent cable.
Failure of remote control
PCB or replacement of
defective indoor unit
PCB
Malfunction could be
produced by noise.
Check the surrounding
area and restart
operation.
(Q0420)
295