Troubleshooting for Outdoor Unit SiBE18-821_C
396 Troubleshooting
7.11 Suction Pipe Thermistor (R3T, R5T) Abnormality
Remote
Controller
Display
J5
Method of
Malfunction
Detection
The temperature detected by the suction pipe thermistor determines the error.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the suction pipe thermistor is detected
Supposed
Causes
Disconnection of thermistor
Defective suction pipe thermistor (R3T, R5T)
Defective main PCB (A1P)
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table 2 on page 427.
Note: Refer to page 326 for detail about monitor mode.
Is the thermistor
ASSY connected to
X12A on the main PCB
(A1P)?
Is the
resistance
normal when
measured after
disconnecting the
thermistor (R3T,
R5T)? (3.5 kΩ ~
360 kΩ)
Replace the main PCB
(A1P).
(R13027)
Connect the thermistor and
turn on again.
NO
Replace the defective
thermistor (R3T, R5T).
NO
YES
YES
Identify the defective
thermistor (R3T or R5T) in
monitor mode. (See note.)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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