Inverter Radiation Fin Temperature Abnormality - Daikin Aurora Series Service Manual

SiUS341802E

2.54 Inverter Radiation Fin Temperature Abnormality

2.54.1 Inverter Radiation Fin Temperature Abnormality (Inverter PCB)
P4
Error Code
Sub code: 09-11
Applicable All outdoor unit models
Models
Method of Error
Detect the resistance of the following thermistors while the compressor stops running:
Detection
Error Decision
When the resistance of the thermistor comes to a value equivalent to open or short circuit.
Conditions
Error is not decided while the unit operation is continued.
P4 will be displayed by pressing the inspection button.
Supposed
Causes
Troubleshooting
Service Diagnosis
Radiation fin thermistor.
Thermistor located in PCB circuit.
Heat sink thermistor.
Defective radiation fin temperature thermistor
Defective inverter PCB
Defective inverter compressor
Defective fan motor
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
relevant thermistor
normal?
YES
The
insulation
resistance of the
relevant inverter compressor
is not more than
100 kΩ.
NO
The insulation
resistance of the relevant
fan motor is not more
than 1 MΩ.
NO
Turn ON
the power supply.
Does the error
recur?
NO
NO
YES
YES
YES
Troubleshooting by Error Code
Replace the inverter PCB.
RXLQ-TATJU,
RXLQ-TAYDU: A3P
RXLQ-TAYCU,
RXYQ-TAYCU: A4P
Replace the compressor.
Replace the fan motor.
Replace the inverter PCB.
Continue operation.
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