Hitachi RAS-(4-6)HVRNS2E - Page 165

5 Control System
155
SMGB0064 rev.0 - 08/2011
5
Outdoor fan control during cooling operation
Pressure switch for
control: ON
Yes
Operation
10 sec.
*1) Fan step at start
Step up
Is fan operated more
than 3 min?.
No
No
Yes
Pipe surface temp. of
outdoor unit heat exchanger
< 30 ºC.
No
Pipe surface temp. of
outdoor unit heat exchanger
> 40 ºC.
No
Same step Step up Step down
Yes
Yes
Pressure switch for
control: ON
Step up
Yes
Is it continuous for
more than 1 min.?
No
Yes
Is it continuous for
more than 3 min.?
Yes
No
Activation for protection device control