SiE39-404 Troubleshooting by Indication on the Remote Controller
Troubleshooting 185
2.10 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas
Pipes
Remote
Controller
Display
C5
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by gas pipe thermistor.
Malfunction
Decision
Conditions
When the gas pipe thermistor becomes disconnected or shorted while the unit is running.
Supposed
Causes
Defect of indoor unit thermistor (R3T) for gas pipe
Defect of indoor unit PC board
Troubleshooting
∗2: Refer to thermistor resistance / temperature characteristics table on P311.
(V2785)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
Replace the indoor unit PC board.
Connect the thermistor and turn
on again.
Replace the thermistor (R3T).
Connector is
connected to X11A of
the indoor unit PC
board.
Resistance
is normal when
measured after
disconnecting the thermistor
(R3T) from the indoor
unit PC board.
(0.6kΩ~
360kΩ)
NO
NO
YES
YES
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