Temperature Sensor - Mitsubishi Electric PURY-HP72 Service Handbook

R410a
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[8-9 Troubleshooting Problems with Major Components on BC Controller ]
8-9-2

Temperature Sensor

HWE13080
Troubleshooting instructions for thermistor
START
Pull out the thermistor connector in
trouble from the board.
Measure the temperature of the thermistor
in trouble. (actual measurement value)
Check the thermistor resistor.
Compare the temperature corresponding to the
resistance measured by the thermistor and the
temperature measured by a commercially
available thermometer, and check whether
there is no difference between them.
Temperature difference
NO
Insert the connector of the thermistor
in trouble into the board, check the sensor
inlet temperature on the LED monitor,
and check the temperature difference.
Temperature difference
NO
Normal
- 279 -
Note 1
Note 2
Note 2
YES
Replace the thermistor
Note 3
YES
Check for contact failure.
Replace the control board.
GB

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