Leakage detection, A/C system
| Leakage detection, A/C system |
There is a leakage detection substance in the refrigerant in the form of a tracing agent. The colour of the tracing agent exists in the form of a tablet in the receiver. The tracing agent is then dissolved in the compressor oil and reaches the entire refrigerant system. The self-illuminating yellow signal colour also facilitates the detection of the smallest leakage in the refrigerant system.
When the refrigerant is drained the compressor oil is also drawn off. When the compressor oil is filled a quantity of tracing agent must be added to facilitate leakage detection. This does not apply in the cases when a new receiver is fitted as it already contains tracing agent.
A UV lamp and special glasses are required to identify the tracing agent, as described in the current service manual "1:4 workshop equipment". The refrigerant system is illuminated with the UV lamp. The leaking refrigerant is then visible with the special glasses due to the self-illuminating yellow signal colour.
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When the UV lamp and special glasses are used, pure engine oil in the form of a drop has a similar fluorescent effect as the signal colour. |
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