Mitsubishi Eclipse. Technical Information Manual (1994) - part 95

EQUIPMENT   Heater and Air Conditioning

A/C COMPRESSOR CONTROL

If any of the switches and sensors is caused to
be OFF, the compressor clutch relay and compres-

sor magnet clutch are forced to the OFF state.

Blower switch

Manually set to ON and OFF

 switch

Manually set to ON and OFF

Dual pressure switch

Low pressure switch

OFF 

at 200 

 (29 psi) or lower;

ON at 220 

 (32 psi) or higher

High pressure switch

OFF at 3,140 

 (456 psi) or lower;

ON 

at 2,550 

 (370 psi) or higher

Refrigerant temperature switch 

ON at approx. 110°C (230°F) or lower;
OFF at approx. 

 (329°F) or higher

Air inlet sensor

Measure the evaporator inlet air and surface temper-

.=

atures and input the measured data to the auto 

Fin 

 sensor

pressor-ECM. (Refer to the auto compressor-ECM
control characteristic diagram on 

Revolution pick-up 

 <Non-turbo>

OFF when compressor slipping rate(s) is 70% or
more

<Turbo>

Ignition switch (IG2)

Fusible link

Auto

ECM

Air 

 Fin 

sensor

sensor

 

Fuse

1

, compressor

 clutch relay

Compressor

EQUIPMENT

 - Heater and Air Conditioning

<Non-turbo>

Ignition switch (IG2)

Auto compressor-ECM

Ignition coil

Air 
sensor

ed

I

Fin thermo

 

 

sensor

Dual
pressure

switch

Revolution
pick-up sensor

Fusible link

Compressor

EQUIPMENT   Heater and Air Conditioning

Meltable
bolt
(Abolished)

iccan

Section A-A 

2 0 x 0 1 9 7

New refrigerant
system

Conventional
refrigerant
system

Charging hose

C O N D E N S E R   F A N   A N D   R A D I A T O R   F A N   C O N -

T R O L

For information on condenser fan and radiator fan control,
refer to Group 1 Control System of Engine.

RECEIVER

l 

The new refrigerant 

 is highly 

 and

would require much more amount of conventional desiccant

(silica gel) to be kept dry.

The new desiccant (molecular sieve) used for drying the

refrigerant has enough capacity to absorb moisture without
need for change to the receiver capacity.

l

In the conventional design, the meltable bolt on the receiver

fuses to let out the refrigerant gas in its entirety into open
air when the high-pressure side pressure becomes too

high.

The new system has a relief valve in the compressor which

plays the same role as the meltable bolt but closes after
release of only necessary quantity of refrigerant, so that

the amount of released refrigerant is limited to the minimum.

NOTE
For details about the relief valve, see COMPRESSOR,

SERVICE VALVE

A quick-disconnect type joint, instead of conventional screw-in
type joint, is used for the service valve to prevent incorrect
charging and enhance serviceability.