Thermistor Or Related Abnormality (Indoor Unit) - Daikin FTXL20G2V1B Service Manual

SiENBE04-925_A
4.5

Thermistor or Related Abnormality (Indoor Unit)

C4, C9
Remote Control
Display
Method of
The temperatures detected by the thermistors determine thermistor errors.
Malfunction
Detection
Malfunction
The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation.
Decision
Conditions
„ Disconnection of connector
Supposed
„ Defective thermistor
Causes
„ Defective indoor unit PCB
Troubleshooting
Check No.06
Refer to P.120
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Check the connection of
connectors.
Is it normal?
YES
Check No. 06
Check the thermistor resistance
value.
Is it normal?
YES
NO
NO
Troubleshooting
Correct the connection.
Replace the thermistor.
Replace the indoor unit PCB.
(R7134)
81