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

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A/C refrigerant system, servicing<br />

Página 16 de 51<br />

87-100<br />

A/C pressure switch -F129-, checking<br />

Notes:<br />

The presence of -F129- is engine dependant.<br />

Where -F129- is not used, high pressure sensor<br />

-G65- is used instead Page 87-85 .<br />

Always confirm system use of either -F129<br />

G65- and applicable wiring circuit using<br />

applicable "Engine" and "Air conditioning"<br />

wiring diagrams.<br />

The pressure switch can be removed without<br />

discharging refrigerant system.<br />

- Visually check that O-ring 10,8 mm x 1,8 mm is<br />

positioned correctly in the groove.<br />

Switch part between terminals 1 and 2 switches off<br />

the A/C clutch -N25- when the system pressure is<br />

too high or when there is not enough refrigerant in<br />

the system .<br />

Switch opens when the pressure is below 1.2<br />

bar and closes again above 2.4 bar (switch<br />

point).<br />

Switch opens above 32 bar and closes again<br />

below 24 bar (switch point).<br />

Switch part between terminals 3 and 4 switches<br />

coolant fan -V7- (via the coolant fan control module<br />

-J293-) to the next higher fan speed when system<br />

pressures increase.<br />

Switch closes above 16 bar and opens again<br />

below 12.5 bar (switch point).<br />

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

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

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