TIF RX-1A Refrigerant Leak Detector - Manual (Page 8)

4. 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.
5. At each area checked, the probe should be moved around the location, at a rate
no more than 25 to 50 mm/second (1-2 in/second), and no more than 5 mm (1/4
in) from the surface, completely around the position. Slower and closer move-
ment of the probe greatly improves the likelihood of finding a leak (see Fig. 3,
below). Any increase in beep rate is indicative of a leak.
6. An apparent leak shall be verified at least once as follows:
a) Blow shop air into the area of the suspected leak, if necessary, and repeat 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.
b) First move the probe to fresh air and reset. Then hold the probe tip as close
as possible to the indicated leak source and slowly move around it until the leak
is confirmed.
Automotive A/C Systems only -
7. 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 for the refrigerant to accumulate in
the case for 10 minutes.
After such time, insert 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 alarms, a leak apparently has been found.
All Systems -
8. Following any service to the refrigerant system and any other service which dis-
turbs the refrigerant system, a leak test of the repair and of the service ports of
the refrigerant system should be done.
6
OPERATING TIPS
Fig. 3