SiBE18-821_C Troubleshooting for SA Indoor Unit
Troubleshooting 369
5.6 Indoor Liquid Pipe Thermistor (R2T) Abnormality
Remote
Controller
Display
C4
Method of
Malfunction
Detection
The temperature detected by indoor liquid pipe thermistor (R2T)
Malfunction
Decision
Conditions
When the indoor liquid pipe thermistor becomes disconnected or shorted while the indoor unit is
running.
Supposed
Causes
Defective thermistor
Defective indoor unit PCB
Disconnection of connector
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table 2 on page 427.
Connect it correctly.
Replace the thermistor
(R2T).
Replace the indoor
unit PCB.
NO
NO
YES
YES
(R13004)
Disconnect the thermistor
(R2T) from X18A on the
indoor unit PCB and measure
the resistance.
Is the
thermistor normal?
Is it normal?
Check the connection of
connector.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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