Repair Manual

AIR CONDITIONING
62
62 - 5
In order to detect the refrigerant liquid leakage, the detector INFICON type HDL 300 (or
similar) may be used, calibrated to detect leakage of aprox. 9gr./an.
Start the engine and switch on the air conditioning unit. Check through the sight glass of the
dryer filter tank if there are any air bubbles; if through the sight glass air bubbles can not be seen,
the unit is in good operation, but if air bubbles are occurring and they remain during operation,
this shows the lack of refrigerant fluid.
If there are not air bubbles and the air conditioning system is not operating, the refrigerant
fluid must be checked.
The lack of refrigerant fluid can be confirmed by measuring the circuit pressure, at a filling
station.
IMPORTANT :
When starting each time the compressor, air bubbles appearance through the sight
glass, for few seconds, is normal.
DETECTION OF REFRIGERANT F LUID LEAKAGE
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