Daikin FTKS50BVMB, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
368 Troubleshooting
7.7 Abnormal Discharge Pipe Temperature
Remote Control
Display
F3
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection Abnormality is detected according to the temperature detected by the discharge pipe
temperature sensor.
Malfunction
Decision
Conditions When the discharge pipe temperature rises to an abnormally high level
When the discharge pipe temperature rises suddenly
Supposed
Causes „ Faulty discharge pipe temperature sensor
„ Faulty connection of discharge pipe temperature sensor
„
Faulty outdoor unit PCB
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P407.
(V3068)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge
pipe temperature is
120˚C or higher when the
unit stop by
malfunction.
Pull out the discharge pipe
thermistor from the outdoor
PCB, and then make
measurement of resistance
using a multiple meter.
Replace outdoor unit PC board
(A1P).
Replace the discharge pipe
thermistor.
NO
NO
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
YES
YES