jcb JS300 Service Manual page 200

Heater/Air Conditioning Controls
Introduction
A Display
B Fan speed switch
C Temperature control switch
D Defrost/Demist switch
E Recirculation switch
F Auto mode switch
G On/Off switch
The heater/air conditioning control panel is installed on the left console.
Adjust the air vents to direct the hot air flow to the front window (for demisting) and/or the cab floor.
To activate the control panel push the On/Off switch, the switch LED (Light Emitting Diode) and the panel will
illuminate.
Auto Mode
The heater can be set to a selected temperature. The fan speed and the temperature are then automatically
controlled to maintain the set temperature.
1. Push the auto mode switch to start the auto mode. The LED will illuminate and the letter 'A' is shown on
the display.
2. Turn the temperature control switch to set the required temperature. This temperature is shown on the
display and the fan speed is automatically set to reach and then maintain this set temperature.
3. If the fan speed switch is adjusted, then the auto mode will have to be reset. Push the auto mode switch
to reactivate.
4. In hot weather or dusty environments, the recirculation mode should be used. Push the recirculation switch.
Recirculation Mode
To start, push the defrost/demist switch, the LED will illuminate and the switch symbol is shown on the display.
In hot weather to produce comfortable working conditions:
1. Close the door and windows.
2. Push the recirculation switch.
3. Turn the fan speed switch clockwise and direct the air flow into the body of the cab.
4. Turn the temperature control switch fully counterclockwise for maximum defrost. If the temperature in the
cab drops too low turn the switch clockwise.
Defrost/Demist Mode
In cold/damp weather, to minimise misting:
125
Figure 166.
A
D
G F E
9831/1100-2
Heating, Ventilating and Air-Conditioning (HVAC)
C B
Operation
125