Troubleshooting by Indication on the Remote Controller SiBE37-701_B
281 Troubleshooting
3.12
“
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 PCB
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P450.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
Normal (The malfunction is caused
by faulty contact.)
YES
YES
NO
Remove the thermistor from
the indoor unit PCB, and then
insert it again.
Replace the thermistor (R3T).
Replace the indoor unit PCB.
Remove the thermistor from the
indoor unit PCB, and then make
resistance measurement of the
thermistor using a multiple
meter.
Is the thermistor
normal?
∗
5 k
Ω
to 90 k
Ω
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