Remote Sensor Abnormality - Daikin RXSQ24TAVJU Service Manual

Troubleshooting by Error Code

4.26 Remote Sensor Abnormality

C9
Error Code
Applicable
FXTQ-TA, CXTQ-TA
Models
Method of Error
The error is detected by remote sensor temperature.
Detection
Error Decision The remote sensor becomes disconnected or shorted while the unit is running.
Conditions
Supposed
Causes
Troubleshooting
∗1. Connector and indoor unit PCB
Note:
CHECK 11
191
Defective indoor unit thermistor (R1T) for room temperature
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the
optional remote
sensor is installed?
YES
Connector is
connected to the indoor
unit PCB (∗1).
YES
Resistance
is normal when
measured after
disconnecting the sensor
from the indoor unit
PCB.
CHECK 11
YES
Connector for remote sensor
X4A
Refer to page 266.
Field
NO
setting 10(20)-2 is set to
03.
YES
NO
NO
PCB
A1P
SiUS331708EA
NO
Set to 03.
Replace the indoor unit PCB.
Connect the sensor and turn ON
again.
Replace the sensor (R1T).
Replace the indoor unit PCB.
Service Diagnosis