3.31 " L4 " Outdoor Unit; Temperature Rise; L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise - Daikin RXMQ4·5·6PVE Service Manual

Troubleshooting by Indication on the Remote Controller

3.31 " L4 " Outdoor Unit:

Temperature Rise

L4
Remote
Controller
Display
Applicable RX(Y)MQ4~6P
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 83°C.
Decision
Conditions
Supposed
Causes
Troubleshooting
166
Malfunction of Inverter Radiating Fin
Actuation of fin thermal (Actuates above 83°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.
The radiator
fin temperature is supposed
to have risen to 83°C
or more.
NO
Is the
connector X111A of
the fin thermistor properly
connected to the
outdoor PCB?
YES
Turn ON the power supply,
and then press the remote
controller check button once.
Is the
malfunction code "P4"
displayed on the remote
controller?
NO
Does the
malfunction code "L4"
recur when the unit starts
operation?
NO
YES
NO
YES
YES
Si34-603
Faulty heat radiation of power unit
• Air suction opening blocked
• Dirty radiator fin
• High outdoor temperature
Properly connect.
To "P4" troubleshooting
Replace the outdoor PCB (A1P)
as well.
Continue operation.
Troubleshooting