jcb JS300 Service Manual page 377

Heater/Air Conditioning Controls (ATC)
The heater/air conditioning can be set for automatic
temperature control (ATC).
Located on the right console, the heater system is
controlled by the following switches:
7
1 2 3 4
Fig 3.
1 On/Off switch.
2 Auto mode switch.
3 Re-circulation switch.
4 Defrost/Demist switch.
5 Temperature control switch.
6 Fan speed switch.
7 Display.
Heater Controls
Hot air can be directed to the front window (for demisting)
and/or the cab floor by adjusting the air vents.
To activate controls press switch 1, the switch LED and
panel 7 will illuminate.
Auto Mode
The heater can be set to a selected temperature. The fan
speed and temperature control will then be automatically
controlled to maintain the set temperature.
B-8
5 6
T006520
9813/5100-1
Section B - Body and Framework
Heater/Air Conditioning SYSTEM
1 Auto mode is activated by switch 2, the LED will
illuminate and an `A' will appear on the display 7.
2 Rotate control 5 to set the desired temperature.
3 The set temperature will be displayed on panel 7.
4 The fan speed will be automatically set to reach and
then maintain the set temperature.
Note: If control 6 is moved, Auto mode will have to be
reset. Press switch 2 to reactivate.
5 In hot weather or dusty environments, re-circulation
mode should be used. Select switch 3.
Defrost/Demist Mode
To activate press switch 4, the LED will illuminate and
switch symbol will be displayed on 7.
1 In hot weather to produce comfortable working
conditions.
a Close the door and windows.
b Select re-circulation switch 3.
c Rotate control 6 clockwise and direct air into the
body of the cab.
d Rotate control 5 fully counter-clockwise for
maximum defrost. If the in cab temperature drops
to low turn control clockwise.
2 In cold/damp weather, to minimise misting.
a Close the door and windows.
b Select re-circulation switch 3.
c Set control 6 fully clockwise and direct air onto the
front window.
d Set control 5 fully clockwise to heat the de-
humidified conditioned air, de-mist the screen and
generally de-humidify the cab air.
Operation Overview
B-8