Daikin VRV EMERION RXYQ-AATJA, Service Manual

Page: 298 / 429

Troubleshooting by Error Code SiUS342303E
291 Part 6 Service Diagnosis
Note(s)
Reference
3.28 Remote Sensor Abnormality
Applicable
Models
FXTQ-TA, CXTQ-TA
Error Code
C9
Method of Error
Detection
The error is detected by remote sensor temperature.
Error Decision
Conditions
When the remote sensor becomes disconnected or shorted while the unit is running.
Supposed
Causes
 Defective indoor unit thermistor (R1T) for room temperature

Defective indoor unit PCB
Troubleshooting

1. Connector and indoor unit control PCB
CHECK 11 Refer to page 381.
Is the
optional remote sensor
is installed?
Field setting
10(20)-2 is set to
03 .
Connector is
connected to the indoor
unit control PCB
( 1).
Resistance
is normal when
measured after
disconnecting the sensor
from the indoor unit
control PCB.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Set to 03 .
Replace the indoor unit control
PCB.
NO NO
YES
YES
Replace the indoor unit control
PCB.
Connect the sensor and turn ON
again.
NO
NO
Replace the sensor (R1T).
YES
YES
CHECK 11
Connector for remote sensor PCB
X4A A1P