Daikin FXSQ32MVE [307/458] Outdoor unit abnormal discharge pipe temperature

Daikin FXDQ40NAVE [307/458] Outdoor unit abnormal discharge pipe temperature
Troubleshooting by Indication on the Remote Controller Si34-803
296 Troubleshooting
3.24
F3
Outdoor Unit: Abnormal Discharge Pipe
Temperature
Remote
Controller
Display
F3
Applicable
Models
RXYQ5P(A)~54P(A)
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 PC board
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.428.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge
pipetemperature is 115˚C
or higher when the unit stop
by malfunction.
Pull out the discharge pipe
thermistor from the outdoor PC
board, and then make
measurement of resistance
using a multiple meter.
Are
the characteristics
of the discharge pipe
thermistor normal?
(3.5~400K)
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

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