Heater/Air Conditioner Compartment And Controls - Komatsu 530M Operation & Maintenance Manual

Operation - Section 3
Page 3-14
HEATER / AIR CONDITIONER
COMPARTMENT AND CONTROLS
The heater/air conditioner compartment contains the
heater/air conditioner controls (6, Figure 3-1) and
some of the heater/air conditioner components, such
as the blower motor assembly and the heater coils.
Optimum cab air climate can be selected by using the
following controls in various combinations.
DEFROSTER VENT CONTROL SWITCH
The defroster control switch (1, Fig-
ure 3-3) directs heated air for wind-
shield defrosting. ''Down'' position
of the toggle switch is OFF. ''Up''
position of the toggle switch is On.
HEAT VENT CONTROL SWITCH
The heater control (2, Figure 3-3)
directs heated air to the cab floor for
heating of the cab.
''Down'' position of the toggle
switch is OFF. ''Up'' position of the
toggle switch is On.
FAN CONTROL KNOB
The fan control knob (3, Figure 3-3)
is provided to control the cab air fan
motor. The fan motor is a 3-speed
motor (low, medium and high).
Speeds are selected by rotating the
control knob clockwise to the de-
sired position. ''Off'' is full counter-
clockwise position.
AIR CONDITIONER CONTROL KNOB
The Air Conditioner control knob (4,
Figure 3-3) controls the air condi-
tioner to cool the cab air. Cooler
temperatures are selected by rotat-
ing the control knob clockwise to
the desired temperature. Full clock-
wise position is coldest setting.
''Off'' is full counter-clockwise posi-
tion.
OUTSIDE/INSIDE AIR CONTROL SWITCH
The outside/inside air control switch (5, Figure
3-3) allows either outside or inside air to be circu-
lated through the cab heater assembly.
Moving the switch ''Up'' directs out-
side air to be circulated through the
heater assembly and through the
cab.
Moving the switch ''Down'' directs
inside air to be recirculated through
the heater assembly.
SELECTION CONTROL SWITCH
The Selection Control Switch (6, Figure 3-3) is provided
for the operator to select a comfortable temperature.
Rotating the knob counter-clockwise (blue arrow)
will select cooler temperatures.
Full counter-clockwise position is the coldest air
setting.
Rotating the knob clockwise (red arrow) will select
warmer temperatures.
Full clockwise position is the warmest heater set-
ting.
FIGURE 3-3. A/C & HEATER CONTROLS
OM3006.2 04/98
Operator Cab and Controls