Refrigerant Circuit, Converting R12 To R134A And Servicing
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NOTE:
For environmental reasons and on account of the corresponding legislation, refrigerant R12 can no longer be manufactured or supplied. Refrigerant R134a has been developed as a replacement for R12.
A/C systems developed and designed for refrigerant R12 cannot however simply be charged with refrigerant R134a. To ensure trouble-free operation of the air conditioning system even after conversion, various components of the refrigerant circuit must be replaced.
A precise description of the conversion procedure and information on the servicing of converted refrigerant circuits can be found in repair information: Air Conditioner with Refrigerant R12 Parts 2 and 3. (This repair information is only available in hard copy).