SW-Stahl und Werkzeugvertriebs GmbH
Tel. +49 (0) 2191 / 46438-0
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RECOMMENDED PROCEDURE
Note:
On Automotive A/C Systems leak test with the engine not in operation.
The air conditioning or refrigeration system should be charged with sufficient refrigerant to have a
gauge pressure of at least 340 kpa (50 psi) when not in operation. t temperatures below 15"C
(59"F), leaks may not be measurable, since this pressure may not be reached.
Take care not to contaminate the detector probe tip if the part being tested is contaminated. If the
part is particularly dirty, or condensate (moisture) is present, it should be wiped off with a dry shop
towel or blown off with shop air. No cleaners, or solvents should be used, since the detector may
be sensitive to their ingredients.
Visually trace the entire refrigerant system, and look for signs of air conditioning lubricant leakage,
damage, and corrosion on all lines, hose, and components. Each questionable area should be
carefully checked with the detector probe, as well as all fittings, hose to line couplings, refrigerant
controls, service ports with caps in place, brazed or welded areas, and areas around attachment
points and hold-downs on lines and components.
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 should be moved around the location, at a rate no more than 25 to 50
mm/second and no more than 5 mm from the surface, completely around the position, which
could reach the best effect and when there's a rapid buzzing noise, it means the leak point is
found.
At this time, the instrument should be moved away and be readjusted to appropriate position so
as to locate the specific leak point.
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.
Note on car air conditioners:
Leak testing of the evaporator must be with switched on fans before. Testing as follows: Start the
engine, air-conditioning and blower fan on and let run at the highest level for 3 min..
Air conditioning and engine off, leave the blower fan for about 15 seconds at the highest level and
then switch off. The leak detector probe tip through the opening of blower resistor and vents introduce
into the blower / evaporator housing. Make sure that the blower / evaporator housing is dry to avoid
false readings. In case of leakage the item will be sounds a alarm.
MAINTENANCE
Appropriate maintenance to the unit is really very critical and please carefully follow.
The instructions below in order to reduce performance problems and enhance the life of the unit.
Warning
: Turn unit off before removing the sensing tip. Failure to do so may result in a mild electrical
shock. Keep the sensing tip clean: Prevent dust, moisture and grease build-up by utilizing the
provided tip protector. Never use the unit without the protector in place.
Before using the unit always inspect the tip and protector to see that they are free of dirt and grease.
To clean
:
1. Remove protector by grasping and pulling off tip.
2. Clean protector with shop towel and/or compressed air.
3. If the tip itself is dirty, it can be cleaned by being immersed in a mild solvent, such as alcohol, for a
few seconds, and then using compressed air and/or a shop towel to clean.
Note:
Never use solvents such as gasoline, turpentine, mineral spirits, etc ... as these will leave a
detectable residue and desensitize your unit.
Hinweis: Verwenden Sie niemals Lösungsmittel wie Benzin, Terpentin, Waschbenzin,
etc., diese können Rückstände hinterlassen, auf die das Gerät anspricht.
DISPOSAL
Never recycle batteries or the product with your domestic waste. Collect worn out
batteries or electrical appliances and recycle them at your local collecting point.