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Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

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Pressures, checking on vehicles<br />

Página 17 de 33<br />

- B- Pressure in refrigerant circuit<br />

in line with table or higher:<br />

- Start engine.<br />

- Set air conditioning system to<br />

maximum cooling output.<br />

- Open doors.<br />

- Open air vents in instrument<br />

panel.<br />

Engine drives A/C compressor by<br />

ribbed belt via A/C Clutch.<br />

Note:<br />

- If A/C compressor is not being<br />

driven, check voltage supply for<br />

A/C Clutch N25 according to<br />

wiring diagram.<br />

- If voltage supply is OK, repair<br />

A/C clutch.<br />

If A/C compressor is driven, check<br />

refrigerant circuit:<br />

- Set engine speed to 2000 RPM.<br />

- Observe pressure gauge set:<br />

Specified values<br />

High pressure side:<br />

Increasing from pressure with<br />

engine switched off up to<br />

maximum 20 bar positive<br />

pressure.<br />

Low pressure side:<br />

Decreasing from pressure with<br />

engine switched off up to 1.3 bar<br />

positive pressure.<br />

Restrictor, reservoir and<br />

A/C Compressor<br />

Regulator Valve N280<br />

(externally regulated<br />

compressor), checking<br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...<br />

13/2/<strong>2005</strong>

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