Focus ZTS L4-2.0L DOHC VIN 3 (2001)
Refrigerant Pressure Sensor / Switch: Description and Operation
Air Conditioning High Pressure Switch
Installation position
In the line between the condenser and evaporator.
Function
Protection of the air conditioning system against a pressure overload by cutting out the compressor.
Operation
The function of the high-pressure switch is to protect the high-pressure section of the refrigerant circuit. When pressure exceeds the maximum value of
31.4 bar because, for instance, the air flow through the condenser is impeded or the high-pressure line is blocked, the high-pressure switch switches
the compressor off.
The compressor will not be switched on again until the pressure has dropped back to 17.2 bar.
The fan speed increases when the pressure is more than 20.7 bar. The EEC V module will not switch the fan to a lower speed until the pressure has
dropped back to 17.2 bar.