Other information:
Oil Specification
1.
The HFC-134a system requires synthetic (PAG) compressor oil
whereas the R-12 system requires mineral compressor oil. The two oils
must never be mixed.
2.
Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of compressor.
Inspection
1.
Check the condenser fins for clogging and damage. If clogged,
clean them with water, and blow them with compressed air. If bent,
gently bend them using a screwdriver or pliers.
2.
Check the condenser connections for leakage, and repair or replace it, if required.