Hitachi RAC-VJ18PHAE Service Manual page 33

5
ODU Heat Exchange
thermistor
Ooutdoor
5-1
The ODU heat exchanger thermistor circuit measure the heat exchanger intermediate temperature of the outdoor unit,
and micro computer estimate the pressure of compressor according to the temperature data.
When the pressure reach the internal set value of the micro computer, the micro computer will adjust the speed of the
compressor to protect the pressure of compressor.
CN30
47
40
41
42
Fig. 5-1
78
78
HIC P.W.B
R267
C226
R311
- 33 -
ODU Heat Exchange
70
thermistor
78
83
Ooutdoor
77
8 3
70 77 78 83