XJ (X350) V8-4.2L (2005)
Compressor HVAC: Description and Operation
A/C Compressor
NOTE: The A/C compressor internal components are not serviced separately. The A/C compressor is serviced only as an assembly.
The A/C compressor has the following characteristics:
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A variable capacity function controlled by an external solenoid.
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A displacement capacity of 160cc.
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The compressor is clutchless.
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The compressor operates all the time (from 2% to 100% while the engine is running).
A/C Compressor Pressure Relief Valve
An A/C compressor pressure relief valve is incorporated in the compressor to:
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relieve unusually high refrigerant system discharge pressure buildups.
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prevent damage to the A/C compressor and other system components.
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avoid total refrigerant loss by closing after the excessive pressure has been relieved.