Transmission Error Between Remote Controller And Indoor Unit - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB
3.69 Transmission Error between Remote Controller and
Indoor Unit
Applicable
All indoor unit models
Models
U5
Error Code
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
 Transmission error between indoor unit and remote controller
Causes  Connection of 2 main remote controllers (when using 2 remote controllers)
 Defective indoor unit control PCB
 Defective remote controller PCB
 Transmission error caused by noise
Troubleshooting
Reference
Refer to page 126 for Main/Sub setting.
Part 6 Service Diagnosis
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
control PCB microcomputer
normal monitors
blinking
YES
Replace the remote controller
and restart operation.
Is operation normal?
NO
Replace the indoor unit control
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
Troubleshooting by Error Code
YES
Set one of the remote
controllers to Sub, turn OFF
the power supply temporarily,
then restart operation.
NO
Replace the indoor unit
control 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.
422