SiUS281117
Troubleshooting by Remote Controller
168
Service Diagnosis
2.46 Transmission Error (between Remote Controller and
Indoor Unit)
Remote
Controller
Display
U5
Applicable
Models
All indoor models
Method of Error
Detection
Micro-computer checks if transmission between indoor unit and remote controller is normal.
Error Decision
Conditions
The error is generated when the micro-processor detects that the transmission between the
indoor unit and the remote controller is not normal over a certain amount of time.
Supposed
Causes
Connection of 2 main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Defective remote controller PCB
External factor (Noise, etc.)
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
YES
Replace the indoor unit
PCB.
Set one remote controller to
"SUB"; 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.
There is possibility of error
caused by noise. Check the
surrounding area and turn ON
again.
Normal
Normal
NO
Replace the remote controller
Normal
Replace the indoor unit PCB.
Normal
Using 2-remote
controllers control.
All indoor
unit PCB micro-computer
monitors blink.
SS1 of both remote
controllers is set to
"MAIN."
Operation
returns to normal when
the power is turned OFF
momentarily.
YES
NO
YES
NO
NO
YES
YES
NO
YES
NO
