The Informant™ 2
12
0019-9211 Rev 9
• Always follow the refrigerant system around in a continuous path so
that no areas of potential leaks are missed. If a leak is found, always
continue to test the remainder of the system.
• At each area checked, the probe shall be moved around the location,
at a rate no more than 25 to 50 mm/sec (1 to 2 in./sec), and no more
than 5 mm (0.2 inch) from the surface completely around the position.
Slower and closer movement of the probe greatly improves the
likelihood of finding a leak.
• An apparent leak shall be verified at least once by blowing shop air into
the area of the suspected leak, if necessary, and repeating the check
of the area. In cases of very large leaks, blowing out the area with
shop air often helps locate the exact position of the leak.
• Leak testing of the evaporator core while in the air conditioning module
shall be accomplished by turning the air conditioning blower on high for
a period of 15 seconds minimum, shutting it off, then waiting an
additional 15 seconds minimum for the refrigerant to accumulate in the
case, then inserting the leak detector probe into the blower resistor
block or condensate drain hole if no water is present, or into the
closest opening in the heating/ventilation/air conditioning case to the
evaporator, such as the heater duct or a vent duct. If the detector
activates, a leak apparently has been found.
• Following any service to the refrigerant system of the vehicle, and any
other service which disturbs the refrigerant system, a leak test of the
repair and of the service ports of the refrigerant system shall be done.
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