Hitachi ZAXIS 135US-5B Operator's Manual page 171

 Blower Switch (6)
 When the AUTO indicator (8) is ON, the blower speed is
automatically controlled.
 When AUTO indicator (8) is OFF,
the blower speed is controlled in 6 steps.
Rotate blower switch (6) clockwise to increase blower
speed. Rotate blower switch (6) counterclockwise to
decrease blower speed.
The monitor (7) indicates the corresponding blower fan
speed.
 AUTO/OFF Switch (6)
Push AUTO/OFF Switch (6) while the air conditioner is OFF,
it turns into AUTO mode. Press AUTO/OFF switch (6) while
operating the air conditioner, it stops operating.
OPERATOR'S STATION
1-107
5
6
8
7
MDCD-01-026
MDAA-01-001EN