Daikin Super Multi Plus E-Series - Malfunction of Transmission between Remote Control and Indoor Unit

Troubleshooting for Outdoor Unit SiEN18-622
394 Troubleshooting
7.30 Malfunction of Transmission between Remote Control
and Indoor Unit
Remote Control
Display
U5
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote control, check the system using microcomputer is signal
transmission between indoor unit and remote control (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
 Malfunction of indoor unit remote control transmission
 Connection of two main remote controls (when using 2 remote controls)
 Defect of indoor unit PCB
 Defect of remote control PCB
 Malfunction of transmission caused by noise
Troubleshooting
Caution
(V2823)
NO
YES
YES
NO
NO
NO
YES
YES
YES
NO
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Using 2-remote
controls control.
All indoor
PC board microcomputer
monitorsblink.
Multi-core
cable isused for the
indoor unit remote
control transmission
wiring.
SS1 of
both remote controls
isset to "MAIN."
Operation
returns to normal when
the power is turned off
momentarily.
Set one remote control to
"SUB"; turn the power supply
off once and then back on.
Replace indoor unit
PC board.
There is possibility of
malfunction caused b
y noise.
Check the surrounding area
and turn on again.
Switch to double-core
independent cable.
replacement
Defect of remote control PC
board or indoor unit PC
board. Replace whichever is
defective.