Mitsubishi Electric PQRY-P200YEM-A Service Handbook page 91

2) Temperature sensor
Thermistor troubleshooting flow
Start
Disconnect applicable thermistor
connector from the board.
Measure temperature of applicable
thermistor (actual measured value).
Check thermistor resistance value.
Compare temperature for thermistor
resistance value with actual mea-
sured valued.
No
No
difference?
Yes
Insert applicable thermistor connector
into board, and check sensor input
temperature on LED monitor for differ-
ence.
No
No
difference?
Yes
No abnormality.
Note 1
Note 2
Note 3
Note 5
Change thermistor.
Note 4
Check for connection
problem.
Change the controller
board.
–90–