Reactor Surface Thermistor Abnormality - Daikin REYQ-XA Service Manual

Troubleshooting by Error Code

3.58 Reactor Surface Thermistor Abnormality

P3
Error Code
Applicable
REYQ72-120XATJU
Models
Method of Error
Detect according to the value detected with the reactor surface thermistor.
Detection
Error Decision When the system is in operation and the thermistor causes wiring disconnection or short circuit in it.
Conditions
Supposed
Causes
Troubleshooting
335
Defective connection of thermistor
Defective reactor surface thermistor
Defective inverter PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Make measurement of
resistance of the radiation
fin thermistor.
Is the
resistance of the
thermistor normal?
YES
Turn ON the
power supply.
Does the error
recur?
NO
NO
YES
SiUS371901E
Replace the inverter PCB
(A3P).
Replace the inverter PCB
(A3P).
Continue operation.
Service Diagnosis