Daikin RXYQ-TA Series, Руководство по обслуживанию, Страница: 269 / 337

SiUS341615E Troubleshooting by Error Code
Service Diagnosis 256
3.51 Reactor Temperature Abnormality
Error Code
P3
Applicable
Models
All outdoor unit models
Method of Error
Detection
Detect according to the value detected with the reactor surface thermistor.
Error Decision
Conditions
The system is in operation and the thermistor causes wiring disconnection or short circuit in it.
Supposed
Causes
„
Defective connection of thermistor
„
Defective reactor thermistor
„
Defective inverter PCB
Troubleshooting
Check in Monitor Mode
12/14 ton are equipped with 2
compressors.
Check for the compressor 1 or
2 applicable to the error code
P3 while in monitor mode of
the outdoor unit PCB.
Make measurement of
resistance of the radiation
fin thermistor.
Is the
resistance of the
thermistor normal?
Turn ON the
power supply.
Does the error
recur?
NO
YES
YES
NO
Replace the inverter PCB.
(

1)

1
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
Replace the inverter PCB.
(

1)
Continue operation.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.