Daikin VRV S RXQ4/5ARV1 - Radiation Fin Temperature Rise Abnormality

Troubleshooting by Error Code SiAF332111E
268 Part 6 Service Diagnosis
5.43 Radiation Fin Temperature Rise Abnormality
5.43.1 Radiation Fin Temperature Rise Abnormality (4/5 HP Models)
Applicable
Models
RXQ4/5AR
Error Code L4
Method of Error
Detection
The radiation fin temperature is detected by the radiation fin thermistor.
Error Decision
Conditions
The radiation fin temperature exceeds a certain temperature.
Supposed
Causes
 Activation of radiation fin thermistor
 Defective outdoor unit main PCB
 Defective radiation fin thermistor
Troubleshooting
Defective radiation from the power
unit
• Blocked air suction port
• Stained radiation fin
• High outdoor air temperature
Connect the connector correctly.
Eliminate P4 error.
Keep operating.
Replace the outdoor unit
main PCB (A1P).
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
YES
YES
YES
YES
NO
NO
NO
NO
Is the radiation fin
temperature greater than the
designed temperature?
Does the remote
controller display error
code P4?
Does the
connector X111A of fin
thermistor connect to the
outdoor unit main PCB
correctly?
When the unit starts
operating, is the error code L4
displayed again?
Connect to the power and then press
the INSPECTION/TEST button on
remote controller.