Thermistor Or Related Abnormality (Indoor Unit) - Daikin FTXG-J Service Manual

SiBE041012_B
4.5

Thermistor or Related Abnormality (Indoor Unit)

C4 , C9
Error Code
Method of Error The temperatures detected by the thermistors 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.110
Check the connection of
connectors.
C4
C9
Service Diagnosis
Disconnection of connector
Defective thermistor
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
: Indoor heat exchanger thermistor
: Room temperature thermistor
NO
NO
Troubleshooting
Correct the connection.
Replace the thermistor.
Replace the indoor unit PCB.
(R15717)
73