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

Troubleshooting by Indication on the remote control
3.31 "L4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
L4
remote control
Display
Applicable
RXYSQ4~6P
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 ! Actuation of fin thermal (Actuates above 83°C)
! Defect of inverter PC board (A2P)
Causes
! Defect of fin thermistor
Troubleshooting
158
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 84°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
control check button once.
Is the malfunction
code "P4" displayed
on the remote
control?
NO
Does the malfunction code
"L4" recur when the unit
starts operation?
NO
YES
NO
YES
YES
SiENBE34-703
Faulty heat radiation of power unit
• Air suction opening blocked
• Dirty radiator fin
• High outdoor temperature
Properly connect.
To "P4" troubleshooting
Replace the inverter PC board
assy (A2P) as well.
Continue operation.
Troubleshooting