Robinair A/C machine Model 17800B

Robinair Cooltech Model 17800B A/C machine was retrofitted to operate with R-22.  Item was removed from service when last vehicle equipped with R-22 was retired.  Machine will need serviced and repaired to function with R-12 and R-134a.  Tank on unit is empty and should be serviced or replaced as well according to the date.  Machine did function with R-22 when removed from service.  Item is being sold as is, where is.  No warranty or guarantee.  Cash payment only.