Daikin REYQ72, Serveice Manual

Page: 162 / 273

SiUS39-602 Troubleshooting by Indication on the Remote Controller
Troubleshooting 151
2.20
“
F3
”
Outdoor Unit: Abnormal Discharge Pipe
Temperature
Remote
Controller
Display
F3
Applicable
Models REYQ72M, 96M
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
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(V3068)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge pipe
temperature is 239˚F
or higher.
Are
the characteristics
of the discharge pipe
thermistor normal?
(3.5~400K
Ω
)
∗
1
Replace outdoor unit PC board
(A2P).
Replace the discharge pipe
thermistor.
NO
NO
Out of gas, compression defect,
etc. Defect of the refrigerant
system.
YES
YES