Thermistor Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.45 Thermistor Abnormality

Applicable
All outdoor unit models
Models
H9, J3, J5, J6, J7, J8, J9
Error Code
Method of Error
Detect according to temperature detected with individual thermistors.
Detection
Error Decision
The system is in operation and the thermistor causes wiring disconnection or short circuit in it.
Conditions
Supposed
 Defective connection of thermistor
Causes  Defective thermistor
 Defective outdoor unit main PCB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Thermistor is
NO
connected to the
connector.
YES
Resistance
is normal when
measured after
NO
disconnecting the
thermistor from the
outdoor unit
main PCB.
CHECK 11
YES
Troubleshooting by Error Code
Connect the connector and turn
ON again.
Replace the thermistor ( 1).
Replace the outdoor unit main
PCB (A1P).
302