Mazda CT-L1005, Руководство по обучению

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Diagnosis and Repair Basic Climate Control
Draining the A/C System
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Before a component of the A/C system can be removed, the refrigerant needs to be
drained from the system.
NOTE: Failure to drain the refrigerant from the system before removing a component could
cause injury, and also lead to unnecessary environmental pollution.
•
Before draining, make sure there is enough space left in the refrigerant container to
accept the expected refrigerant amount from the vehicle. Also make sure that there is
enough space left in the oil container to capture any compressor oil drawn out during the
draining process.
•
To drain the A/C system, connect the A/C service machine to the low- and high-pressure
ports of the system, and use the vacuum pump to draw the refrigerant out. During this
process the machine will either manually or automatically weigh the amount of
refrigerant taken from the system. This is the only 100% reliable way of verifying how
much refrigerant was in the system. The amount of refrigerant and compressor oil
removed should be noted.
NOTE : The compressor oil removed from the A/C circuit must not be re-used.
Evacuating the A/C System
•
During the evacuation stage the A/C service machine applies a deep vacuum to the
system to remove any unnecessary air or moisture. This should be done before filling the
system with refrigerant.
Filling the A/C System
•
The A/C system has been emptied, the component has been replaced, and now the
refrigerant needs to be refilled.
•
Before filling, make sure that the oil container of the A/C service machine is emptied, and
then filled with the correct compressor oil for the vehicle being serviced.
Curriculum Training 05-6