L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin; Temperature Rise; L4" Outdoor Unit: Malfunction Of; Inverter Radiating Fin Temperature Rise - Daikin VRV III RXYQ5-54PY1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.32 "L4" Outdoor Unit:

Temperature Rise

L4
Remote
Controller
Display
Applicable RXYQ5P~54P
Models
Method of Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Detection
Malfunction When the temperature of the inverter radiation fin increases above 93°C.
Decision
Conditions
Supposed
Causes
Troubleshooting
Power OFF
Power ON
260
Malfunction of Inverter Radiating Fin
Actuation of fin thermal (Actuates above 93°C)
Defect of inverter PC board
Defect of fin thermistor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Fin temperature
of the compressor
inverter is high.
Remove and insert the fin
thermistor connector "X111A".
Turn ON
the power supply,
and then check whether or
not the malfunction
recurs.
YES
If the fin reaches a
temperature of 93˚C, the
malfunction will occur.
NO
YES
NO
Si34-601A
Faulty radiation from the
switch box:
Conduct the checks
shown below.
• Radiation fin for stains
• Airflow for interference
• Fan propeller for damage
• Whether or not outdoor
temperature is too high
Replace the inverter
PCB.
End of measures
• It is supposed that
radiation fin
temperature has risen
due to on-site causes.
Conduct the checks
shown below.
• Radiation fin for
stains
• Airflow for interference
• Fan propeller for
damage
• Whether or not
outdoor temperature
is too high
Troubleshooting