Troubleshooting by Indication on the Remote Controller ESIE09-08A
190 Troubleshooting
3.39 “L4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
Remote Control
Display
L4
Applicable Models ER*Q 011~016*
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 connecting or disconnecting connector,
otherwise parts may be damaged.
Faulty heat radiation of power unit
Air suction opening blocked
Dirty radiator fin
High outdoor temperature
Check heat conductive paste
NO
YES
The radiator
fin temperature is
supposed to have risen
to 84C or more.
Properly connect.
YES
NO
Is the
connector X111A of
the fin thermistor properly
connected to the outdoor
PC board?
Continue operation.
Replace the inverter PC board assy
(A2P)
YES
Does the
malfunction code "L4"
recur when the unit starts
operation?
NO
Turn ON the power supply, and then
press the remote control check
button once.
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