Daikin RXYQ5-48MAY1, Service Manual

Page: 217 / 352

Troubleshooting by Indication on the Remote Controller Si39-407
206 Troubleshooting
3.20
“
F3
”
Outdoor Unit: Abnormal Discharge Pipe
Temperature
Remote
Controller
Display
F3
Applicable
Models RXYQ5MA~48MA
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 PCB
Troubleshooting
∗
2: Refer to thermistor resistance / temperature characteristics table on P319.
(V3068)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge pipe
temperature is 115˚C
or higher.
Are
the characteristics
of the discharge pipe
thermistor normal?
(3.5~400K
Ω
)
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