Thermistor Abnormality - Daikin VRV S RXQ4/5ARV1 Service Manual

SiAF332111E

5.38 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
When the system is in operation and the thermistor causes wiring disconnection or short circuit
Conditions in it.
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
CHECK 11
Resistance is
normal when
measured after
NO
disconnecting the
thermistor from the
outdoor unit
main PCB.
YES
Troubleshooting by Error Code
Connect the connector and turn
ON again.
Replace the thermistor ( 1).
Replace the outdoor unit main
PCB (A1P).
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