Thermistor Abnormality - Daikin RZQG71L9V1 Service Manual

ESIE15-13C
4.9

Thermistor Abnormality

C4, C5, C9
Remote
Controller
Display
All models of indoor unit
Applicable
Models
The error is detected by temperature detected by thermistor.
Method of Error
Detection
When the thermistor becomes disconnected or shorted while the unit is running.
Error Decision
Conditions
 Defective connector connection
Supposed
 Defective thermistor
Causes
 Defective indoor unit PCB
 Broken or disconnected wire
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the connector connection.
Is it connected properly?
YES
Check the thermistor resistance.
CHECK 1
Is it normal?
YES
Error Code
C4
Heat exchanger thermistor
C5
Intermediate heat exchanger thermistor
C9
Suction air thermistor
Refer to P.185.
CHECK 1
Service Diagnosis
NO
NO
Defective Thermistor
Troubleshooting by Remote Controller
Correct the connection.
Replace the thermistor.
Replace the outdoor unit PCB.
Symbol
R2T
R3T
R1T
131