Specifications

SiBE28-805 Troubleshooting by Indication on the Remote Controller
Troubleshooting 175
3.30
“
L4
”
Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise
Remote
Controller
Display
L4
Applicable
Models
CMSQ200A7, 250A7
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 93°C.
Supposed
Causes

Actuation of fin thermal (Actuates above 93°C)

Defect of inverter PC board

Defect of fin thermistor
Troubleshooting
Power OFF
Power ON
Remove and insert the fin
thermistor connector "X111A".
Faulty radiation from the
switch box:
Conduct the checks
shown below.
• Radiation fin for stains
• Airflow for interference
•
Fan propeller for damage
• Whether or not outdoo
r
temperature is too high
NO
YES
Turn ON
the power supply,
and then check whether or
not the malfunction
recurs.
End of measures
• It is supposed that
radiation fin
temperature has risen
due to on-site causes.
Conduct the checks
shown below.
•
Radiation fin for stains
• Airflow for interference
• Fan propeller for
damage
• Whether or not
outdoor temperature
is too high
Replace the inverter
PC board.
YES
NO
Fin temperature
of the compressor
inverter is high.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
If the fin reaches a
temperature of 93˚C, the
malfunction will occur.