BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
- Cooling systems, heating
   + Cooling system
   + Heater
   - Air conditioner
      Operation of the conditioner
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics


Air conditioner

General information


1 — the fan
2 — the evaporator
3 — a throttle
4 — service accession of low pressure
5 — service accession of high pressure
6 — a dehumidifier
7 — the condenser
8 — the compressor

and — external air of cooling
b — heated air, arrives in
with — not cooled air, arrives
via the heater fan
d — the cooled air, comes to salon
And — the high pressure (gas)
In — the high pressure (liquid)
With — the low pressure (liquid)
D — the low pressure (gas)

By means of the conditioner air temperature in interior of the car can be lowered to an izha of external temperature. At completely automatic system the established temperature is maintained in salon. At the same time distribution and amount of air is regulated by the electronic device irrespective of car speed. For this purpose electronic sensors transfer to the electronic device information on temperature of external air and air in salon. The control of air gates and fan of supply of external air is carried out by servomotors. Possible malfunctions in the control unit or sensors and executive bodies register in memory of malfunctions. By means of the special device contents of memory can be schitano.