Daikin R42NUY2S - C4, C5, C9 Thermistor Abnormality

Troubleshooting by Remote Controller Si20-701_B
121
3.17
C4
,
C5
,
C9
Thermistor
Abnormality
Remote Controller Display
C4
,
C5
,
C9
Applicable Models
FH(Y)C, FH(Y)K, FH(Y)B, FH(Y), FAY, FV(Y), FUY, FHC,
FH, FDBG, FDBT, FDMG, FCQ(H), FMCQ, FFQ, FHQ,
FAQ, FBQ,FDQ, FMDQ, FUQ, FVQ, FCQG, FHQG
Method of Error Detection
The error is detected by temperature detected by
thermistor.
Error Decision Conditions
When the thermistor becomes disconnected or shorted
while the unit is running.
Supposed Causes
 Defective connector connection
 Defective thermistor
 Defective indoor unit PCB
 Broken or disconnected wire