Daikin REYQ72, Serveice Manual

Page: 172 / 273

SiUS39-602 Troubleshooting by Indication on the Remote Controller
Troubleshooting 161
2.30
“
J8
”
Malfunction of Oil Equalizing Pipe Thermistor (R7T)
Remote
Controller
Display
J8
Applicable
Models REYQ72M, 96M
Method of
Malfunction
Detection Malfunction is detected according to the temperature detected by oil equalizing pipe thermistor.
Malfunction
Decision
Conditions When the oil equalizing pipe thermistor is short circuited or open.
Supposed
Causes
„
Faulty oil equalizing pipe thermistor (R7T)
„
Faulty outdoor unit PC board
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(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
(R7T) from outdoor unit PC
board normal?
(3.5 k
Ω
to
360 k
Ω
)
∗
1
Replace outdoor unit PC board
(A1P).
Connect thermistor and operate
unit again.
NO
NO
Replace thermistor (R7T).
YES
YES
Is
the connector
for oil equalizing
pipe thermistor
connected to X37A on
outdoor unit PC
board (A1P)?