Volkswagen Polo Service & Repair Manual: Refrigerant Circuit with Expansion Valve and Evaporator

Refrigerant Circuit Design

...

Refrigerant Circuit with Restrictor and Reservoir

1 -  A/C Compressor 2 -  Condenser 3 -  Restrictor 4 -  ...

Other materials:

Run-Flat System PAX, Examining Support Ring
As with the tire, the supporting ring is generally not replaced after driving with flat tire.     Replace the support ring if the following damages have occurred: Blowouts or mis ...

Refrigerant Circuit with A/C Service Station, Draining
  Caution If it is suspected that chemicals were added to the refrigerant circuit to seal leaks, do not connect the A/C service station and do not extract the refrigerant. ...

Connecting Service Station
  Turn off the ignition. –  Connect the A/C service station to the power supply. –  Connect quick-release coupling adapter to charging hoses of service station (handwheels not screwed in/ha ...