Remote Sensor Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.28 Remote Sensor Abnormality

Applicable
FXTQ-TA, FXTQ-TB, CXTQ-TA
Models
C9
Error Code
Method of Error
The error is detected by remote sensor temperature.
Detection
Error Decision
When the remote sensor becomes disconnected or shorted while the unit is running.
Conditions
Supposed
 Defective indoor unit thermistor (R1T) for room temperature
Causes  Defective indoor unit PCB
Troubleshooting
Note(s)
1. Connector and indoor unit control PCB
Reference
CHECK 11 Refer to page 366.
Part 6 Service Diagnosis
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 control PCB
( 1).
YES
Resistance
is normal when
measured after
disconnecting the sensor
from the indoor unit
control PCB.
CHECK 11
YES
Connector for remote sensor
X4A
NO Field setting
10(20)-2 is set to
03.
YES
NO
NO
PCB
A1P
Troubleshooting by Error Code
NO
Set to 03.
Replace the indoor unit control
PCB.
Connect the sensor and turn ON
again.
Replace the sensor (R1T).
Replace the indoor unit control
PCB.
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