Page 1127 - Workshop Manual - Aumark (BJ1051)
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Heater and AC-Refrigerant oil
Reading of pressure meter (reference value)
Pressure of low pressure side
High speed area of fan
High speed area of fan
Low speed area of fan
Pressure of
high pressur
e side
2. Leak detection by soap lye
For the bigger leak on the connection position of refrigerant pipe, it can be checked by spraying
soap lye by sprayer to observe if there is air bubble generated on its surface. This method is simple
and convenient but it can not find the tiny leak.
3. Leak detection by non-specific detector
This kind of detector can check all kinds of liquid or gas leak and take no account of the chemical 51
element of the detected object. It has the advantages of convenient, stable and low cost. But it can
not be used for area detection.
4. Leak detection by halogen leak detector
It is equipped with special sensor so it can detect the trace compound of fluorine, chlorine, bromine and
iodine in the air but without disturbance. Its biggest advantage is high sensitivity which can decrease the
misinformation efficiently. The lowest detection limit is lower than 5g/year for area detection; and lower
than 1.5g/year for spot detection (the leakage of one leak point every year is 1.5g).
5. Leak detection by special electronic leak detector
This kind of detector is complicated and expensive, and it can detect some special compound
sensitively without disturbance by other objects. For example: R-134a special leak detector which is
with high sensitivity and high selectivity, it can find the leak point accurately and it can recognize if
the refrigerant is R-134a; pay attention to the contamination around during application because it is
so sensitive, otherwise there may be misinformation reported.
6. Leak detection by fluorescent dye
Fluorescent dye can produce fluorescence under the irradiation of ultraviolet rays; put this kind of
dye into refrigerant oil or refrigerant, and the leak point will be found clearly under irradiation of
ultraviolet lamp when there is leak inside of the system.
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