Specifications

SiBE341027 Troubleshooting by Remote Controller
Service Diagnosis 159
2.34 Transmission Error (between Remote Controller and
Indoor Unit)
Remote
Controller
Display
U5
Applicable
Models
All indoor unit models
Method of Error
Detection
Micro-computer checks if transmission between indoor unit and remote controller is normal.
Error Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes

Transmission error between indoor unit and remote controller

Connection of two main remote controllers (when using 2 remote controllers)

Defective indoor unit PCB

Defective remote controller PCB

Transmission error caused by noise
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
NO
NO
YES
NO
Replace the indoor unit
PCB.
Set one remote controller to
"SLAVE"; turn the power
supply off once and then back
on.
There is possibility of error
caused by noise. Check the
surrounding area and turn on
again.
The indoor unit PCB is normal.
There is possibility of error
caused by noise. Check the
surrounding area and turn on
again.
Normal
Normal
NO
NO
Using 2-remote
controllers control.
All indoor unit PCB
micro-computer
monitors blink.
Operation returns
to normal when the
power is turned off
momentarily.
YES
YES
YES
SS1 of both remote
controllers is set to
"MAIN."
Replace the remote controller.
Normal
YES
Replace the indoor unit PCB.
Normal
YES