Malfunction Of Transmission (Between Indoor Unit And Remote Controller); Between Indoor Unit And Remote Controller - Daikin SkyAir Super Inverter 70 D Series Service Manual

SiE25-110
6.38 Malfunction of Transmission (Between Indoor Unit and
Remote Controller)
U5
Remote
Controller
Display
LED Display A
Applicable
All models of indoor units
Models
Method of
Microcomputer checks if transmission between indoor unit and remote controller is normal.
Malfunction
Detection
Malfunction When transmission is not carried out normally for a certain amount of time
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
1 2 3 4
— — — — —
Failure of remote controller
Failure of indoor PC board
Outside cause (noise, etc.)
Connection of 2 master remote controllers (When using 2 remote controllers)
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Control by 2
remote controllers
NO
All indoor unit
PC board microcomputer
normal monitors
blinking
YES
Using multicore
transmission wiring
between indoor unit and
remote controller
NO
Is it good
condition from noise
interference?
NO
Troubleshooting by Remote Controller Display / LED Display
SS1 of both
YES
remote controllers is
set to "main."
Resets
NO
normally when power
supply is turned off
temporarily.
YES
YES
YES
YES
Set one of the remote
controllers to"sub,"turn
off the power supply
temporarily, then restart
operation.
NO
Indoor unit PC board
replacement
Malfunction could be
produced by noise.
Check the surrounding
area and restart
operation.
Change to double-core
independent cable.
Failure of remote
controller PC board or
replacement of
defective indoor unit PC
board
Malfunction could be
produced by noise.
Check the surrounding
area and restart
operation.
(S2041)
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