L322 Range Rover System Description and Operation
AIR CONDITIONING
82-42
DESCRIPTION AND OPERATION
Heater Coolant Circuit - Without FBH
1 Coolant valve (low line system)
2 Heater matrix
3 Coolant valves (high line system)
4 Auxiliary coolant pump
5 Engine cooling system
6 ATC ECU
Flap Control – Low Line System
While the ignition is on, the position of the recirculation flaps is manually controlled by selection of the recirculation
switch on the control panel and the steering wheel switch. If the recirculation flaps are in the recirculation position
when the ignition is switched off, the ATC ECU automatically sets them to the fresh air position, to ensure that fresh
air is available if a fault occurs with the recirculation flap drive circuit at the next ignition on.
The positions of the distribution flaps are manually controlled by selection of the distribution rotary switch on the
control panel. The flaps are also automatically positioned by the ATC ECU to open the:
l
Windscreen and footwell outlets, when parked heating is initiated by the FBH
l
Face and footwell outlets, when parked ventilation is initiated
l
Windscreen outlets, when the ignition is switched off and the ambient temperature is less than 0
°
C, or
windscreen and footwell outlets when the ignition is switched off and the ambient temperature is 0
°
C and above.
M82 0819
5
2
4
3
2
1
6
