DRIVER-VALVE 4H0447 - Caterpillar

Fan Speed Override Switch (Increase) (9) - In automatic fan mode, the switch signals the control panel. The control panel sends the signal for manual fan operation to the control module. After receiving the setting for the fan speed, the control panel will display the fan speed on the LCD indicator lights (7) . In the manual fan mode, the switch signals the control panel to increase the fan speed. Also, the control panel changes the LCD display. The new code for the fan speed is sent to the control module. Pressing and holding this switch will cause the control panel to function normally, but the fan speed will increase at the rate of scroll. The control panel also sends the new fan speed to the control module after each increment.
Fan Speed Override Switch (Decrease) (8) - In the automatic fan mode, the switch signals the control panel. The control panel sends a code for manual fan operation to the control module. After receiving the setting for the fan speed, the control panel will display the fan speed on the LCD indicator lights (7) . In the manual fan mode, the switch signals the control panel to decrease the fan speed. The control panel changes the LCD display. Next, the control panel sends the new fan speed to the control module. Pressing and holding this switch will cause the control panel to function normally, but the fan speed will decrease at the rate of scroll. The control panel also sends the new fan speed to the control module after each decrement.
Air Inlet Select Switch (Recirculated Air) (11) - When the air inlet select switch (recirculated air) is pressed, the control panel responds by displaying the relative symbol. The panel then sends the code for recirculation to the control module.
Air Inlet Select Switch (Fresh Air) (10) - When the air inlet select switch (fresh air) is pressed, the control panel responds by displaying the relative symbol. The panel then sends the code for fresh air to the control module.
Air Outlet Select Switch (Upper Body) (15) - When the air inlet select switch (upper body) is pressed, the control panel responds by displaying the relative symbol. The control panel then sends the code for air to the upper body to the control module.
Air Outlet Select Switch (Upper Body and Foot) (14) - When the air outlet select switch (upper body and foot) is pressed, the control panel responds by displaying the related symbol. The control panel then sends the code for air to the control module.
Air Outlet Select Switch (Under Seat) (13) - When the air outlet select switch (under seat) is pressed, the control panel responds by displaying the relative symbol. The control panel then sends the code for air to foot to the control module.
Air Outlet Select Switch (Defroster) (12) - When the air outlet selection switch (defroster) is pressed, the control panel responds by displaying the relative symbol. The control panel then sends the code for the