SiUS341802E
Troubleshooting by Error Code
Service Diagnosis
250
2.54 Inverter Radiation Fin Temperature Abnormality
2.54.1 Inverter Radiation Fin Temperature Abnormality (Inverter PCB)
Error Code
P4
Sub code: 09-11
Applicable
Models
All outdoor unit models
Method of Error
Detection
Detect the resistance of the following thermistors while the compressor stops running:
Radiation fin thermistor.
Thermistor located in PCB circuit.
Heat sink thermistor.
Error Decision
Conditions
When the resistance of the thermistor comes to a value equivalent to open or short circuit.
Error is not decided while the unit operation is continued.
P4
will be displayed by pressing the inspection button.
Supposed
Causes
Defective radiation fin temperature thermistor
Defective inverter PCB
Defective inverter compressor
Defective fan motor
Troubleshooting
Make measurement of
resistance of the radiation fin
thermistor.
Is the
resistance of the
relevant thermistor
normal?
The
insulation
resistance of the
relevant inverter compressor
is not more than
100 k
Ω
.
The insulation
resistance of the relevant
fan motor is not more
than 1 M
Ω
.
Turn ON
the power supply.
Does the error
recur?
NO
YES
NO
YES
NO
YES
YES
NO
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.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for Aurora Series
Page 317: ...SiUS341802E Wiring Diagrams Appendix 304 RXLQ96 120TATJU 2D112581A ...
Page 318: ...Wiring Diagrams SiUS341802E 305 Appendix RXLQ72TAYDU 2D112582A ...
Page 319: ...SiUS341802E Wiring Diagrams Appendix 306 RXLQ96 120TAYDU 2D112583A ...
Page 331: ...SiUS341802E Wiring Diagrams Appendix 318 VAM1200GVJU 3D073270C ...
Page 332: ...Revision History Month Year Version Revised contents 04 2018 SiUS341802E First edition ...