LR3/Disco 3
GENERAL
The Air Conditioning (A/C) system transfers heat from the vehicle interior to the outside atmosphere to provide the heater
assembly with dehumidified cool air. The system consists of:
A compressor.
A condenser.
A receiver drier.
A thermostatic expansion valve.
An evaporator.
Low and high pressure refrigerant lines.
The system is a sealed, closed loop, filled with a charge weight of R134a refrigerant as the heat transfer medium. Oil is
added to the refrigerant to lubricate the internal components of the compressor.
Operation of the air conditioning system is controlled by the Automatic Temperature Control Module (ATCM). For
additional information, refer to
Control Components
(412-04 Control Components)
A/C COMPRESSOR
The A/C compressor circulates the refrigerant around the system by compressing low pressure, low temperature vapor
from the evaporator and discharging the resultant high pressure, high temperature vapor to the condenser. The A/C
compressors for the different engine types differ due to their individual installation requirements, but are otherwise the
same.
Item Part Number
Description
1
-
Pressure relief valve
2
-
Outlet port
3
-
Inlet port
4
-
Solenoid valve
5
-
Electrical connector
6
-
Pulley
