Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the remote control
Troubleshooting 147
3.20 “
F3
” Outdoor Unit: Abnormal Discharge Pipe
Temperature
remote control
Display
F3
Applicable
Models
RXYSQ4~6P
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 P225.
(V3068)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
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.
Are the
characteristics of
the discharge pipe
thermistor normal?
(3.5~400K
Ω
)
∗
Replace outdoor unit PC board
(A1P).
Replace the discharge pipe
thermistor.
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
YES
YES
NO
NO