Hitachi RCUE40AG2 Service Manual page 79

Control system
Prevention of high pressure excess increase
Discharge pressure

 Discharge pressure
Prevention of high pressure excess decrease
 Discharge pressure
 Discharge pressure
2. Heating operation
Basically unit is operated with Max frequency, but under the following conditions revolution number control is
performed.
Prevention of low pressure excess increase
Fan speed control is activated if "suction pressure
*Released at ambient temperature
pag. 77
SMGB0003 rev.0-01/2007
≥
2.2MPa out put +10Hz
≥
2.5 MPa out put max. frequency
≤
0.9 MPa out put -10Hz
≤
0.8 MPa out put min. frequency
≥
0.6 MPa" and "ambient temperature
≤
20 °C
≥
25ºC"
4 4