Specifications

Troubleshooting by Indication on the Remote Controller SiBE28-805
168 Troubleshooting
3.23
“
J3
”
Outdoor Unit: Malfunction of Discharge Pipe
Thermistor (R3T)
Remote
Controller
Display
J3
Applicable
Models
CMSQ200A7, 250A7
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by discharge pipe temperature
thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.
Supposed
Causes

Defect of thermistor (R3T) for outdoor unit discharge pipe

Defect of outdoor unit PC board (A1P)

Defect of thermistor connection
Troubleshooting
The alarm indicator is displayed when the fan is being used also.
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.248.
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
disconnecting the thermistor
R3T from the outdoor unit
PC board.
(2.5kΩ to
1.3kΩ)
Replace outdoor unit PC board
(A1P).
Connect the connector and turn on
again.
NO
NO
Replace the thermistor (R3T).
YES
YES
Connector
is connected to X29A
of outdoor unit
PC board
(A1P).
Confirm which discharge
thermistor is abnormal using
outdoor unit "monitor mode".
(Refer to page 134 and 135)