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

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A/C refrigerant system, troubleshooting<br />

Página 6 de 10<br />

87-136<br />

Test 3: A/C system low pressure, checking<br />

- Connect high- and low-pressure hoses of<br />

refrigerant recovery/recycling/recharging unit<br />

Kent-Moore ACR 4 , or equivalent, to high- and<br />

low-pressure service valves.<br />

- Start engine.<br />

- Set temperature control to maximum "cold" (if<br />

manual A/C) or "LO" (if Climatronic).<br />

- Manual A/C: Press "A/C" button and select first<br />

blower speed.<br />

- Climatronic: Select minimum blower speed<br />

(manual override)) by pressing "decrease blower<br />

speed" button (observe blower speed display in<br />

control head).<br />

- Adjust air distribution to instrument panel<br />

outlets.<br />

- Raise engine speed to 1500 RPM.<br />

Specified result<br />

System low pressure is normal if low-pressure<br />

gauge reads 22-36 psi (1.5-2.5 bar) within 30<br />

seconds.<br />

If specified reading is not obtained, compare<br />

results of all three tests table, Page 87-<br />

137 .<br />

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

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

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