Thermistor Or Related Abnormality - Daikin RMXS-L Series Service Manual

SiUS181305E
4.4

Thermistor or Related Abnormality

C4, C9
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
 Disconnection of connector
Supposed
 Defective thermistor corresponding to the error code
Causes
 Defective indoor unit PCB
Troubleshooting
Check No.01
Refer to P.165
Check the connection of
connectors.
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
Troubleshooting
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
Troubleshooting for CTXS, FTXS, CDXS, FDXS Series
NO
NO
Correct the connection.
Replace the thermistor.
(Replace the indoor unit PCB.)
Replace the indoor unit PCB.
(R15717)
164