Troubleshooting for Outdoor Unit SiBE18-821_C
398 Troubleshooting
7.13 Outdoor Liquid Pipe Thermistor (R7T) Abnormality
Remote
Controller
Display
J7
Method of
Malfunction
Detection
The temperature detected by the outdoor liquid pipe thermistor determines the error.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the outdoor liquid pipe thermistor is detected
Supposed
Causes
Disconnection of thermistor
Defective outdoor liquid pipe thermistor (R7T)
Defective main PCB (A1P)
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table 2 on page 427.
Is the
thermistor ASSY
connected to X13A on the
main PCB (A1P)?
Is the
resistance
normal when
measured after
disconnecting the
thermistor (R7T)?
(3.5 kΩ~ 360 kΩ)
Replace the main PCB
(A1P).
(R13029)
Connect the thermistor and
turn on again.
NO
Replace the outdoor liquid
pipe thermistor (R7T).
NO
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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