Transmission Error Between Remote Controller And Indoor Unit - Daikin REYQ-TA Series Service Manual

Troubleshooting by Error Code
3.57 Transmission Error between Remote Controller and
Indoor Unit
U5
Error Code
Applicable All indoor unit models
Models
Method of Error Microcomputer checks if transmission between indoor unit and remote controller is normal.
Detection
Error Decision
Transmission is not carried out normally for a certain amount of time.
Conditions
Supposed
Causes
Troubleshooting
255
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
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Using 2
remote controllers
control.
NO
All indoor
unit PCB microcomputer
monitors blink.
YES
Replace the remote controller.
Normal
NO
Replace the indoor unit PCB.
Normal
NO
SS1 of both
YES
remote controllers is set
to "MAIN".
NO
Operation
NO returns to normal when
the power is turned OFF
momentarily.
YES
YES
YES
SiUS371614E
YES
Set 1 remote controller to
"SUB"; turn the power supply
OFF once and then restart.
NO
Replace the indoor unit
PCB.
There is possibility of error
caused by noise. Check the
surrounding area and turn ON
again.
Normal
Normal
There is possibility of error
caused by noise. Check the
surrounding area and turn ON
again.
Service Diagnosis