Daikin RXYQ-TA Series, Руководство по обслуживанию, Страница: 282 / 337

Troubleshooting by Error Code SiUS341615E
269 Service Diagnosis
3.59 Transmission Error between Remote Controller and
Indoor Unit
Error Code
U5
Applicable
Models
All indoor unit models
Method of Error
Detection
Microcomputer checks if transmission between indoor unit and remote controller is normal.
Error Decision
Conditions
Transmission is not carried out normally for a certain amount of time.
Supposed
Causes
„
Transmission error between indoor unit and remote controller
„
Connection of 2 main remote controllers (when using 2 remote controllers)
„
Defective indoor unit PCB
„
Defective remote controller PCB
„
Transmission error caused by noise
Troubleshooting
Using 2
remote controllers
control.
SS1 of both
remote controllers is set
to "MAIN".
All indoor
unit PCB microcomputer
monitors blink.
Operation
returns to normal when
the power is turned OFF
momentarily.
NO
NO
NO
YES
NO
Replace the indoor unit
PCB.
Set 1 remote controller to
"SUB"; turn the power supply
OFF once and then restart.
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 NO
YES
YES
YES
Replace the remote controller.
Normal
YES
Replace the indoor unit PCB.
Normal
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.