Reactor Temperature Abnormality - Daikin RXYQ-TA Series Service Manual

SiUS341615E

3.51 Reactor Temperature Abnormality

P3
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect according to the value detected with the reactor surface thermistor.
Detection
Error Decision The system is in operation and the thermistor causes wiring disconnection or short circuit in it.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Defective connection of thermistor
Defective reactor thermistor
Defective inverter PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
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?
YES
Turn ON the
power supply.
Does the error
recur?
NO
NO
YES
Troubleshooting by Error Code
Replace the inverter PCB.
( 1)
1
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
Replace the inverter PCB.
( 1)
Continue operation.
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