Circuit boards for Davey Spa-Quip Spa Power 500 spa controllers. There is a difference in wiring looms and incoming power connection between the 2 versions. Also the 500A has a manual reset hi-limit that this new mk2 version pcb does not.
Old Style suits: Spa Power 500, 500A, Spa Power 54500, 54500a. These are no longer available. You will need to purchase the upgrade kit here.
This includes: 54500-15, 54500-20, 500A15, 500A20
New Style Suits: Spa Power 500A Mk II pcb for all Spa Power 500A Mk 2 SP500 controllers. Does NOT suit first release 500A circuit board replacement above.
This Includes: SP500A15MK2 and SP500A20MK2