VW Golf manuals

Volkswagen Golf Service & Repair Manual: Pressures and temperatures in the refrigerant circuit

  WARNING
When working on the refrigerant circuit, observe generally applicable safety rules and the Regulations for Pressure Tanks.
The pressures and temperatures in the refrigerant circuit depend on the momentary operating conditions (e.g. engine speed, speed 1, 2, or 3 of radiator fan, engine temperature, whether air conditioner compressor is on or off) as well as environmental influences (e.g. ambient temperature, humidity, required cooling output).
In vehicles with air conditioner compressor regulating valve -N280-, the pressure on the low-pressure side is varied by activating the valve.
Therefore, the values given in the following tables may only be considered as guidelines. They occur at an engine speed of 1,500 to 2,000 rpm and an ambient temperature of 20°C after about 20 minutes.
The locations of connections provided for pressure measurements can be found in the vehicle-specific coolant circuits.
→ Rep. gr.87
At 20°C and with the engine stopped, the refrigerant circuit will adjust itself to a pressure of 4.7 bar positive pressure → Chapter.
   
Evaporator output temperature sender -G263- or evaporator temperature sensor -G308
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Refrigerant circuit with expansion valve
A- low-pressure side of the refrigerant circuit. B- high-pressure side of the refrigerant circuit.         ...

Other materials:

Checking inner constant velocity joint
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Indicator lamp in the vehicle key
Fig. 24 Indicator lamp in the vehicle key First read and observe the introductory information and safety warnings If a button on the vehicle key is pressed briefly, the indicator lamp   (arrow) flashes once. The lamp will flash several times if the button is pressed and held, e.g. conve ...

Overview of the front passenger side
Fig. 10 Overview of the front passenger side (left-hand drive vehicles). The controls are mirrored for right-hand drive vehicles Fig. 11 Dash panel near open front passenger door (left-hand drive vehicles). The controls are mirrored for right-hand drive vehicles Key for   and  : ...

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