Daikin ERQ, Service Manual

Page: 211 / 260

ESIE09-05 Troubleshooting by Indication on the Remote Controller
Troubleshooting 201
3.32 “
L4
” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
Remote
Controller
Display
L4
Applicable
Models
ERQ 125 ~ 200 A7V1
Method of
Malfunction
Detection
Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Decision
Conditions When the temperature of the inverter radiation fin increases above 83°C.
Supposed
Causes
„ Actuation of fin thermal (Actuates above 83°C)
„ Defect of inverter PC board (A2P)
„ Defect of fin thermistor
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Faulty heat radiation of power unit
• Air suction opening blocked
• Dirty radiator fin
• High outdoor temperature
Continue operation.
NO
YES
YES
Replace the inverter PC board
assy (A2P) as well.
YES
The radiator
fin temperature is supposed
to have risen to 84
°
C
or more.
Properly connect.
YES
NO
Is the
connector X111A of
the fin thermistor properly
connected to the outdoor
PC board?
To "P4" troubleshooting
Is the
malfunction code "
P4
"
displayed on the remote
controller?
Does the
malfunction code "
L4
"
recur when the unit starts
operation?
NO
NO
Turn ON the power supply,
and then press the remote
controller check button once.
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