Daikin SkyAir Super Inverter 70 D Series, Service Manual

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SiE25-110 Troubleshooting by Remote Controller Display / LED Display
Troubleshooting 183
6.38 Malfunction of Transmission (Between Indoor Unit and
Remote Controller)
Remote
Controller
Display
U5
LED Display
A
—
1
—
2
—
3
—
4
—
Applicable
Models
All models of indoor units
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor unit and remote controller is normal.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time
Supposed
Causes
Failure of remote controller
Failure of indoor PC board
Outside cause (noise, etc.)
Connection of 2 master remote controllers (When using 2 remote controllers)
Troubleshooting
Set one of the remote
controllers to"sub,"turn
off the power supply
temporarily, then restart
operation.
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.
All indoor unit
PC board microcomputer
normal monitors
blinking
Control by 2
remote controllers
NO
YES
YES
YES
YES
YES
Resets
normally when power
supply is turned off
temporarily.
NO
(S2041)
SS1 of both
remote controllers is
set to "main."
YES
NO NO
NO
Is it good
condition from noise
interference?
Using multicore
transmission wiring
between indoor unit and
remote controller
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.