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

Troubleshooting by Indication on the Remote Controller
3.39 "L4 " Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
L4
Remote Control
Display
ER*Q 011~016*
Applicable
Models
Fin temperature is detected by the thermistor of the radiation fin.
Method of
Malfunction
Detection
When the temperature of the inverter radiation fin increases above 83°C.
Malfunction
Decision
Conditions
 Actuation of fin thermal (Actuates above 83°C)
Supposed
 Defect of inverter PC board (A2P)
Causes
 Defect of fin thermistor
Troubleshooting
180
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
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
PC board?
YES
Turn ON the power supply, and then
press the remote control check
button once.
Does the
malfunction code "L4"
recur when the unit starts
operation?
NO
YES
NO
YES
ESIE09-08B
Faulty heat radiation of power unit
Air suction opening blocked
Dirty radiator fin
High outdoor temperature
Check heat conductive paste
Properly connect.
Replace the inverter PC board assy
(A2P)
Continue operation.
Troubleshooting