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

Troubleshooting by Error Codes
4.51 Transmission Error between Remote Controller and
Indoor Unit
U5
Error Code
Applicable All indoor units
Models
Method of Error In case of controlling with 2 remote controllers, check the system using microcomputer if signal
Detection transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
 Transmission error between indoor unit and remote controller
Causes  Connection of 2 main remote controllers (when using 2 remote controllers)
 Defective indoor unit PCB
 Defective remote controller PCB
 Defective transmission caused by noise
Troubleshooting
Reference
Refer to page 90 for Main/Sub setting.
282
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Control by 2
remote controllers
NO
All indoor unit
PCB microcomputer
normal monitors
blinking
YES
Replace the remote controller
and restart operation.
Is operation normal?
NO
Replace the indoor unit PCB
and restart operation.
Is operation normal?
NO
Main/Sub
YES setting of both
remote controllers is set
to Main.
NO
Resets
normally when
NO
power supply is turned OFF
temporarily.
YES
YES
YES
SiUS281811EA
YES
Set one of the remote
controllers to Sub, turn OFF
the power supply temporarily,
then restart operation.
NO
Replace the indoor unit
PCB.
The error could be produced by
noise. Check the surrounding
area and restart operation. (Ex.:
Heavy-duty wireless equipment,
etc.)
Normal.
Normal.
The error could be produced by
noise. Check the surrounding
area and restart operation.
Part 6 Service Diagnosis