What type of technician certification is required to service buses using R-22 refrigerant?
The type of required certification depends on the type of compressor, type of refrigerant, and the function of the cooling. Air-conditioners used in buses, trains, planes, construction vehicles, etc. that use HCFC-22 refrigerant (R-22) are not classified as motor vehicle air conditioners (MVACs); therefore, technicians servicing such appliances must be certified as a section 608 type II or universal technician.
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