Daikin FTXS20G2V1B - Thermistor or Related Abnormality (Indoor Unit)

Troubleshooting SiENBE04-808_A
109 Service Diagnosis
4.5 Thermistor or Related Abnormality (Indoor Unit)
Remote Control
Display
C4C9
Method of
Malfunction
Detection
The temperatures detected by the thermistors determine thermistor errors.
Malfunction
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
Troubleshooting
Check No.06
Refer to P.148
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
YES
(R7134)
NO
Check No. 06
Check the thermistor resistance
value.
YES
NO
Caution
Correct the connection.
Replace the thermistor.
Replace the indoor unit PCB.
Is it normal?
Is it normal?
Check the connection of
connectors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
SiENBE04-808_A.pdf 121 21/02/2011 13:20:02