Volkswagen Polo Service & Repair Manual: Refrigerant Circuit, Flushing

Volkswagen Polo Service & Repair Manual / Refrrigerant R134a Servicing / Refrigerant Circuit, Removing Contaminants / Refrigerant Circuit, Flushing with Compressed Air and Nitrogen / Refrigerant Circuit, Flushing

Note

For vehicles in which no adapters fit on to the refrigerant pipes, for example, a blower pistol with rubber mouthpiece is to be used to blow through individual components. Special care must be taken not to damage the connections (crushing or scratching).

Evaporator is to be flushed via the connection for low-pressure pipe (large diameter) after removing expansion valve or removing restrictor.

Always flush components in direction opposite of refrigerant flow direction.

Check expansion valve and replace if dirty or corroded.

If there are dark, sticky deposits in the components that cannot be removed with compressed air, replace these components.

Thin, light grey deposits on the insides of refrigerant pipes do not impair the function of the components.

After flushing, always replace receiver/dryer or reservoir and restrictor. Replace dryer cartridge or dryer on condensers with attached dryer.

General Information

In order to be able to force moisture and other contaminants out of refrigerant circuit, compressed air and nitrogen (to force moisture out of refrigerant circuit) ar ...

Refrigerant Circuit, Flushing (Cleaning) with Refrigerant R134a

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Other materials:

Instrument overview
Fig. 10 Instrument cluster in the dash panel: type 1 Fig. 11 Instrument cluster in the dash panel: type 2 First read and observe the introductory information and safety warnings Descriptions of the instruments or : Rev. counter (running engine speed in revolutions x 1,000 per mi ...

An economic driving style
First read and observe the introductory information and safety warnings Changing gear earlier In principle, the highest gear is always the most economical gear. A rule of thumb for most vehicles: at a speed of 30 km/h (19 mph) drive in 3rd gear, at 40 km/h (25 mph) in 4th gear and at 50 km/ ...

Fitting the removable ball coupling
Fig. 91 Overview: removable ball coupling First read and observe the introductory information and safety warnings The removable ball coupling is located under the luggage compartment floor with the vehicle toolkit. Key for : Cap Ball coupling Retaining balls Catch for locking ...