Hitachi RAS-4-HNCE - Defrost Operation Control

5. Control System
135
SMGB0079 rev.0 - 01/2013
5
5.4.5 Defrost operation control
Power to
YH2:ON
After 30
seconds
After 90
seconds *
* DSW2-1 ON (and DSW2-2ON for RAS-2.5HVNP)
RAS-(2-2.5)HVNP / RAS-3HVNC
Other than above
IU
demand
frequency
90Hz
<90Hz
Power to
YH2:OFF
Power to
YH2:ON
N