Problem With The RPI

Went to help an old friend with a hoist that will not work today. Bernie was trying to run this 3 phase hoist on single phase power with a converter. Hmmm. After some time I finally figured that the Reverse Phase Inspector (RPI) was preventing it from running... Swapped phases and good to go Almost. Still have to figure out the RPI control circuit contacts... You can not make this up :)