Mitsubishi Electric EHSC-MEC Service Manual page 69

Part Name
Thermistors
Flow sensor
Flow signal V
5 V DC
OCH571D
Disconnect the connector then measure the resistance with a tester.
(At ambient temperatures of 10 to 30°C.)
Thermistor
TH1
TH2
THW1
THW2
THW5
THW6
THW7
THW8
THW9
THWB1
THWB2
1
4
CN1A
69
Check Points
Normal
4.3–9.5 kΩ Open or short
40–100 kΩ Open or short
Flow signal
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.35V
0.0
0 20 40 60
Flow [l/min]
Abnormal
80 100