Can an Air Conditioner compressor be repair?
In such cases, the filling level of the refrigerant circuit is usually checked first.
It is often found that the refrigerant amount in the system is insufficient. Depending on the system type, up to 10 % of refrigerant can diffuse from the air conditioning system within one year.
However, before the system can be newly filled with refrigerant, it must be determined, whether the lack of refrigerant is caused by "natural loss" or a leak. If a leak is suspected, the system may not simply be filled with refrigerant again. First, a search for leaks must be performed, where the air conditioning system is e.g. filled with forming gas and tested using an electronic leak indicator. Depending on the result, either the leaking component (figure 1) of the refrigerant circuit is replaced, or the filter dryer element only. Next, the system is properly evacuated and filled with refrigerant and oil according to manufacturer's specifications.
When the air conditioning system is started up again, it may occur that the compressor output is gone. If the pressure values are compared at the service station it can be observed that the values on the high pressure and low pressure side are almost identical (figure 2). It can be suspected that either the flow in the refrigerant circuit is insufficient (e.g. at the expansion valve) or that the compressor is defective.