F3" Outdoor Unit: Abnormal Discharge Pipe Temperature - Daikin FCQ18PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
F3
3.20 " " Outdoor Unit: Abnormal Discharge Pipe
Temperature
F3
Remote
Controller
Display
Applicable RZQ18~30PVJU
Models
Method of
Abnormality is detected according to the temperature detected by the discharge pipe
Malfunction temperature sensor.
Detection
Malfunction
When the discharge pipe temperature rises to an abnormally high level
Decision When the discharge pipe temperature rises suddenly
Conditions
 Faulty discharge pipe temperature sensor
Supposed
 Faulty connection of discharge pipe temperature sensor
Causes
 Faulty outdoor unit P.C.B.
Troubleshooting
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.166.
111
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Discharge
YES
pipe temperature is
248°F or higher when the
unit stops by
malfunction.
NO
Pull out the discharge pipe
thermistor from the outdoor
P.C.B., and then make
measurement of resistance
using a multiple meter.
Are
the characteristics
NO
of the discharge pipe
thermistor normal?
(3.5~400kΩ)
*
YES
SiUS28-902_a
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
Replace the discharge pipe
thermistor.
Replace the outdoor unit P.C.B.
(A1P).
Troubleshooting