Daikin VRV S RXQ4/5ARV1, Service Manual

Page: 267 / 377

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 261
5.38 Thermistor Abnormality
Applicable
Models
All outdoor unit models
Error Code
H9, J3, J5, J6, J7, J8, J9
Method of Error
Detection
Detect according to temperature detected with individual thermistors.
Error Decision
Conditions
When the system is in operation and the thermistor causes wiring disconnection or short circuit
in it.
Supposed
Causes
 Defective connection of thermistor
 Defective thermistor
 Defective outdoor unit main PCB
Troubleshooting
Thermistor is
connected to the
connector.
Replace the outdoor unit main
PCB (A1P).
Connect the connector and turn
ON again.
NO
NO
Replace the thermistor ( 1).
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
CHECK 11
Resistance is
normal when
measured after
disconnecting the
thermistor from the
outdoor unit
main PCB.