Mitsubishi Eclipse. Technical Information Manual (1994) - part 94

EQUIPMENT   Heater and Air Conditioning

<VENTILATION>

Air guide duct

EQUIPMENT 

 Heater and Air Conditioning

A/C FUNCTIONAL COMPONENTS LIST

The following table relates the A/C system’s functions to its components.

Heater/A/C control

Ducts

Refrigerant circuit

Fin

 sensor

EQUIPMENT   Heater and Air Conditioning

 

110

 Temperature

   (“F)

2050142 

REFRIGERANT TEMPERATURE SWITCH

<TURBO>

The refrigerant temperature switch detects the temperature
of the refrigerant at the delivery port of the A/C compressor
to provide the ON/OFF control of the A/C compressor.

For the location of the refrigerant temperature switch, refer

to the Construction Diagram on 

AUTO COMPRESSOR-ECM

The auto compressor-ECM uses the signals sent from the

 switch, fin 

 sensor and air inlet sensor to provide

the ON/OFF control of the magnetic clutch.

AUTO COMPRESSOR-ECM CONTROL CHARACTERISTICS DIAGRAM

15 (59)

   (50)

8

0

 

 mode ON

A/C mode OFF

ECONO mode ON

A/C and ECONO modes ON

4°C (39°F)

Differential

3°C 

A/C and ECONO modes OFF

Low 

Inlet air temperature

 High

EQUIPMENT   Heater and Air Conditioning

 

COMPRESSOR

l

The A/C system on the non-turbo models incor-
porates a belt locking control function which

prevents the belts from being broken due to
a slip that would occur when the compressor
is locked. This function is achieved by the belt
lock controller located below the blower motor.

The controller compares the compressor speed
obtained from the compressor revolution pick-up
sensor with the engine speed and stops the

 

 

Blinking A/C switch

Compressor
side

 

1 0 0

Fully open

A/C if the result of the calculation exceeds the
predetermined value.
When the compressor is locked, the compressor
operation indicator light in the 

 switch blinks

to warn the driver of the abnormal condition.
A high pressure relief valve is provided to limit
the release of the refrigerant into air to a mini-

mum when the high-pressure side pressure be-

comes too high.

High pressure
relief valve

High pressure

relief valve

HIGH PRESSURE RELIEF VALVE

The valve, which is normally closed by the spring force, is
forced open to release the refrigerant into open air when the

high-pressure side pressure becomes so high that it overcomes

the spring force. When the pressure is lowered back to the

normal level, the valve is closed by the spring force not to
let out any more refrigerant.