Transmission Error Between Remote Controller And Indoor Unit - Daikin LRYEQ16AY1 Service Manual

Troubleshooting

8.4.52 Transmission Error between Remote Controller and Indoor Unit

U5
Error Code
Applicable All indoor models
Models
Method of Error Check the system using micro-computer is signal transmission between indoor unit and remote
controller is normal.
Detection
Error Decision Normal transmission does not continue for 2 min. or more.
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Using 2-remote
controllers control.
NO
All indoor unit PCB micro-
computer monitors blink.
YES
Multi-core wiring is
used for the indoor
unit-remote controller
transmission line.
NO
241
Defective transmission 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
Defective transmission caused by noise
SS1 of both remote
YES
controllers is set to
Operation returns to
NO
normal when the power is
turned OFF momentarily.
YES
YES
"MAIN."
NO
NO
YES
SiBE811001EB
Set one remote controller to
"SUB"; turn the power supply
OFF once and then restart.
Replace the indoor unit PCB.
There is possibility of error
caused by noise. Check the
surrounding area and turn ON
again.
Change to 2-core wiring.
Caused by either a defective
remote controller PCB or a
defective indoor unit PCB.
Replace the relevant part.
CONVENI-PACK