L4" Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
L4
3.29 " " Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
L4
Remote
Controller
Display
Applicable RZQ18~30PVJU
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 180°F.
Decision
Conditions
 Actuation of fin thermal (Actuates above 180°F)
Supposed
 Defect of inverter P.C.B.
Causes
 Defect of fin thermistor
Troubleshooting
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
The radiator
fin temperature is supposed
to have risen to 180°F
or more.
NO
Is the
connector X111A of
the fin thermistor properly
connected to the
outdoor P.C.B.?
YES
Turn ON the power supply,
and then press the remote
controller check button once.
Is the
P4
malfunction code " "
displayed on the remote
controller?
NO
Does the
L4
malfunction code " "
recur when the unit starts
operation?
NO
Troubleshooting by Indication on the Remote Controller
YES
NO
YES
YES
Faulty heat radiation of power unit
• Air suction opening blocked
• Dirty radiator fin
• High outdoor temperature
Connect properly.
P4
To " " troubleshooting
Replace the outdoor P.C.B. (A1P)
as well.
Continue operation.
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