Hitachi RCUE40AG2 Service Manual page 73

Control system
Silence priority mode is valid by a no-voltage contactor input in Dip Switch setting of Standard mode or Saving
energy priority mode, therefore, such changeover as saving energy mode in daytime and silence priority mode at
night can be performed from remote controller.
Silence priority mode (night shift)
Silence effect by reduction
of fan revolution number:
about 2dB
(COP: same as at high
ambient temp.)

NOTE:
The above fi gure is an image, and the real effect differs from temperature condition.
pag. 71
SMGB0003 rev.0-01/2007
Silence priority
ON/OFF
Saving energy priority mode
High COP effect by reduction
of high pressure : about 10%
(Noise: same as at high
ambient temp.)
Standard mode
4 4