technician conditioning repairman using measuring equipment checking electrical at circuit breaker on outdoorr compressor

air box breaker check checking circuit clean cleaner cleaning cold compressor condenser conditioner conditioning control cool cooler cooling dirty distribution electric electrical electricity equipment evacuates filling filter fixing fuse gauge heat heater install installation installer installing maintenance manifold manometer measure measurement measuring mechanic outdoor pressure pump refrigerant repair repairman service switchboard system technician technology temperature tools unit voltage work