Specifications

SiBE28-805 Troubleshooting by Indication on the Remote Controller
Troubleshooting 169
3.24
“
J5
”
Outdoor Unit: Malfunction of Thermistor (R2T, R7T)
for Suction Pipe
Remote
Controller
Display
J5
Applicable
Models
CMSQ200A7, 250A7
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the suction pipe temperature
thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.
Supposed
Causes

Defect of thermistor (R2T), (R7T) for outdoor unit suction pipe

Defect of outdoor unit PC board (A1P)

Defect of thermistor connection
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.247.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after dis-
connecting the thermistor
(R2T), (R7T) from the
outdoor unit PC
board.
(1.8kΩ
to 800kΩ)
Replace outdoor unit PC board
(A1P).
Connect the connector and turn on
again.
NO
NO
Replace the thermistor R2T.
YES
YES
Connector
is connected to
X30A, of outdoor unit
PC board.
(A1P)