A crop baler having a bank of knotters employs a cross flow blower to produce a full width stream of air transversely across the line of knotters to keep them free of debris and residue. The electrical outlet socket may have a first group of electro-conductive plates statically affixed to an outer surface thereof. The method further includes notifying, via the vehicle computing system, a driver of the presence of the determined type of potential hazard. Further, a refrigerating system using the above-mentioned scroll compressor, is incorporated therein with a circuit for injecting ammonia group refrigerant into a compression room in the compression mechanism portion.