Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
18. Close the high-pressure valve when;
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the readings of low-high-pressure gauges become almost equal, after the charging speed is reduced,
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the HFC-134a source becomes empty, or
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the system is filled with the gas.
19. If the HFC-134a source is empty, close the high-pressure valve, close the valve on the can tap, and replace the HFC-134a source with a new one to
restart the operation.
20. Confirm that both the low/high-pressure valves can be closed Start the engine with the A/C switch OFF.
21. Quickly repeat ON-OFF cycles a few times to prevent initial compressor damage.
22. Set up the vehicle to the following status:
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A/C switch ON
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Engine running at 1,500 rpm Blower speed setting to "HI"
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Temperature setting to "MAX COOL"
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Air inlet setting to "RECIRC"
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Windows open
23. While reading the low-pressure gauge, carefully open the low-pressure valve with the refrigerant source connected and the service hose purged.
CAUTION: Never open the high-pressure valve with the engine is running.
24. Adjust the refrigerant flow to maintain the pressure on the low-pressure side at 276 kPa (2.81 kg/sq.cm, 40 psi) max.
25. After the system is fully charged, close the low-pressure valve.
26. Close the valve on the refrigerant source.
27. Disconnect the hose from the service port, and install the service port cap.
