Thermistor Abnormality - Daikin Aurora Series Service Manual

Troubleshooting by Error Code

2.41 Thermistor Abnormality

H9, J3, J5, J6, J7, J8, J9
Error Code
Applicable
All outdoor unit models
Models
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
Causes
Troubleshooting
227
Defective connection of thermistor
Defective thermistor
Defective outdoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Thermistor is
connected to the
connector.
YES
Resistance
is normal when
measured after
disconnecting the
thermistor from the
outdoor unit PCB.
CHECK 11
YES
NO
NO
SiUS341802E
Connect the connector and turn
ON again.
Replace the thermistor (∗1).
Replace the outdoor unit main
PCB (A1P).
Service Diagnosis