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

SiENBE34-703
3.20 "F3 " Outdoor Unit: Abnormal Discharge Pipe
Temperature
F3
remote control
Display
Applicable
RXYSQ4~6P
Models
Method of
Abnormality is detected according to the temperature detected by the discharge pipe
temperature sensor.
Malfunction
Detection
Malfunction
When the discharge pipe temperature rises to an abnormally high level
Decision When the discharge pipe temperature rises suddenly
Conditions
Supposed ! Faulty discharge pipe temperature sensor
! Faulty connection of discharge pipe temperature sensor
Causes
! Faulty outdoor unit PC board
Troubleshooting
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P225.
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Discharge pipe
temperature is 120°C or
higher when the unit stop
by malfunction.
NO
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?
(3.5~400KΩ)∗
YES
Troubleshooting by Indication on the remote control
YES
NO
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
Replace the discharge pipe
thermistor.
Replace outdoor unit PC board
(A1P).
(V3068)
147