Daikin FTXR42EV1B9 Especificaciones Pagina 103

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SiBE04-624_B Troubleshooting
Service Diagnosis 93
2.12 Thermistor or Related Abnormality (Indoor Unit)
Error Code
C4, C9
Method of Error
Detection
The temperatures detected by the thermistors 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
Defective indoor unit PCB (humidity sensor PCB, control PCB)
Troubleshooting
Check No.01
Refer to P.134
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
YES
(R18122)
NO
Check No. 01
Check the thermistor resistance
value.
YES
NO
Caution
Correct the connection.
Replace the thermistor.
(Replace the humidity sensor
PCB.)
Replace the indoor unit PCB.
Normal?
Normal?
Check the connection of
connectors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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