Daikin Super multi NX E Series

SiBE121135_A Troubleshooting for RA Indoor Unit
Service Diagnosis 180
5.5 Thermistor or Related Abnormality (RA Indoor Unit)
Error Code C4, C9, CE
Method of Error
Detection
The temperatures detected by the thermistors are used to determine thermistor errors.
Error Decision
Conditions
The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation.
Supposed
Causes
 Disconnection of connector
 Defective thermistor corresponding to the error code
 Defective indoor unit PCB
Troubleshooting
Check No.01
Refer to P.230
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
CE : Radiant panel thermistor (FVXG series only)
YES
(R15717)
NO
YES
NO
Caution
Correct the connection.
Replace the thermistor.
(Replace the indoor unit PCB.)
Replace the indoor unit PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the connection of
connectors.
Normal?
Check No. 01
Check the thermistor resistance
value.
Normal?