Inverter Radiating Fin Temperature Rise Abnormality - Daikin LRYEQ16AY1 Service Manual

SiBE811001EB

8.5.12 Inverter Radiating Fin Temperature Rise Abnormality

L4
Error Code
Applicable LCBKQ3AV1
Models
Method of Error Fin temperature is detected by the thermistor of the radiation fin.
Detection
Error Decision When the temperature of the inverter radiation fin increases 92°C or more
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
The radiation fin of the
inverter PCB concerned
exceeded a temperature
Turn OFF the power supply, and then
make measurement of resistance of
the radiation fin thermistor.
resistance normal?
Does the error recur
when the power supply
turns ON to start the
CONVENI-PACK
Inadequate cooling of radiation fin
High outdoor air temperature (including short circuit)
Clogged air inlet and outlet
Dirty radiation fin
Defective outdoor unit PCB
Defective thermistor for radiation fin
Defective connection of cooling fan motor connector
Defective cooling fan
Broken fuse for cooling fan
YES
of 92˚C.
NO
Is the thermistor
NO
YES
YES
compressor?
NO
Troubleshooting
LED Indications
l h k h l l l
First digit
l k h h l h h
Second digit
Defective radiation from the
power unit
• Blocked air suction port
• Stained radiation fin
• High outdoor air temperature
Replace the PCB.
Replace the inverter PCB.
Continue the operation.
It is supposed that the
radiation fin temperature
became high due to some
field factors. In this
connection, check the
following points:
• Stained radiation fin
• Airflow obstructed with dirt
or foreign matters
• Damage to fan impellers
• Too high outdoor air
temperature
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