Porsche P-80 2005, Руководство пользователя

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Page 5.8
Climate Control Systems Diagnosis & Repair
A/C Refrigerant System Service & Diagnosis
Importance of a Diagnostic Plan
A planned approach to the diagnosis of an A/C system
problem can help you to locate problems faster. These
steps are typical:
• Perform a performance test
• Check the DTC memory
• Check pressure gauge readings
• Note unusual refrigerant line temperatures
• Verify correct quantity of refrigerant
• Test system components
The performance test will determine the nature of the
problem and verify the complaint. Checking for stored
DTCs will identify suspect components or systems, and
whether the problem is likely to be electrical or
mechanical. Pressure gauge readings will help to verify the
mechanical integrity of the A/C circuit.
With A/C ON, high pressure lines and components should
be warm or hot. Low pressure lines and components
should be cool or cold. If a component is frosted or much
warmer or colder than normal, it could be plugged or
defective.
If refrigerant charge quantity could cause the symptoms
noted, verify that the charge quantity is correct. Test any
components that could cause the symptoms noted.
Always follow procedures and use the specifications in the
Workshop Manual.
Notes: