Operation Lamp Blinking - Daikin RXSQ24TAVJU Service Manual

Troubleshooting by Error Code

4.68 Operation Lamp Blinking

-
Error Code
Applicable
ON/OFF controller
Models All indoor units
Method of Error
DIII-NET communication data is used to detect the error.
Detection
-
Error Decision
Conditions
Supposed
Causes
Troubleshooting
251
Defective transmission between the centralized controller and an indoor unit
Loosened setting connector of the master centralized controller
Defective ON/OFF controller PCB
Defective indoor unit PCB
Defective air conditioner
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Are
there any error
codes displayed on the
remote controller?
NO
Are any
connected
indoor units removed or
the control range
setting changed?
NO
Is
the indoor
unit displaying
error connected to the
power supply?
YES
Is the
connection
wiring broken or
wrong?
YES
A
Go to the next page.
YES
YES
NO
NO
SiUS331708EA
Perform troubleshooting
using the Air Conditioner
Troubleshooting Manual.
Concurrently reset the
power supply of all the
centralized controllers.
Connect the power
supply of the indoor unit.
Correct the wiring.
Service Diagnosis