Daikin VRV II RXYQ8MY1K, Service Manual

Page: 196 / 310

Si39-502A Troubleshooting by Indication on the Remote Controller
Troubleshooting 185
3.29
“
J9
”
Outdoor Unit: Malfunction of Subcooling Heat
Exchanger Gas Pipe Thermistor (R5T)
Remote
Controller
Display
J9
Applicable
Models RXYQ8~30MY1K (E), YLK (E)
Method of
Malfunction
Detection Malfunction is detected according to the temperature detected by subcooling heat exchanger
gas pipe thermistor.
Malfunction
Decision
Conditions When the subcooling heat exchanger gas pipe thermistor is short circuited or open.
Supposed
Causes
„
Faulty subcooling heat exchanger gas pipe thermistor (R5T)
„
Faulty outdoor unit PC board
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P277.
(V3075)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the
resistance
measured after
removing the thermistor
(R5T) from outdoor unit PC
board normal?
(3.5 k
Ω
to
360 k
Ω
)
Replace outdoor unit PC board
(A1P).
Connect connector and operate
unit again.
NO
NO
Replace thermistor (R5T).
YES
YES
Is
the connector
for subcooling heat
exchanger gas pipe
thermistor connected to
X37A on outdoor
unit PC board
(A1P)?