Thermistor Or Related Abnormality (Ra Indoor Unit) - Daikin Super multi NX E Series Service Manual

SiBE121135_A
5.5

Thermistor or Related Abnormality (RA Indoor Unit)

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