Temperature Sensor - Mitsubishi Electric CMB-WP1016V-GA1 Service Handbook

[ VIII Troubleshooting ]

2. Temperature sensor

1) Connectors on the circuit board are connected to the sensors as follows. Unplug the corresponding connectors before check-
ing each sensor.
Sensor
TH11~TH12
TH13~TH14
TH15~TH16
TH31a~TH31b
TH31c~TH31d
TH31e~TH31f
TH31g~TH31h
TH32~TH33
TH31i~TH31j, TH34
TH31k~TH31l, TH35
TH31m~TH31n
TH31o
TH31p
2)
Pull out the sensor connector from the I/O board, Do not pull the sensor by holding the lead wire.
Measure the resistance with such as a tester.
Compare the measured value with that of shown in the figure below. When the result is
HWE1410A
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
Connectable connector
CN501
CN502
CN511
CN503
CN504
CN508
CN509
CN510
CN505
CN506
CN507
CN515
CN516
Note 1
Note 2
Note 2
YES
Replace the thermistor
Note 3
YES
Check for contact failure.
Replace the control board.
- 170 -
10%, it is normal.
GB