Daikin Aurora Series Service Manual page 251

SiUS341802E
2.47.3 Inverter Radiation Fin Temperature Rise Abnormality (Diode Bridge)
L4
Error Code
Sub code: 12-14
Applicable RXLQ96/120TATJU, RXLQ96/120TAYDU
Models
Method of Error
Diode bridge radiation fin temperature is detected by the thermistor.
Detection
Error Decision
Detected temperature exceeds a certain level.
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Insulation sheet (blue) improperly fixed on the heat sink
Radiation fin plate not fixed with screws
U0 error
Defective diode bridge
High outdoor air temperature
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Normal?
YES
Disconnect, and then
reconnect the connector
(X8A) for the fin thermistor on
the inverter PCB (A3P).
Turn ON the
power supply, and
check if the error recurs
when operation
starts.
YES
Replace the thermistor (R72T).
Turn ON the
power supply, and
check if the error recurs
when operation
starts.
YES
NO
NO
NO
Troubleshooting by Error Code
Rectify troubles.
Continue operation.
Field factor. Radiation fin temperature
may have risen due to high outdoor
temperature.
Troubleshooting is finished.
Replace the diode bridge (V1R).
If the problem recurs, replace the
inverter PCB (A3P).
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