Upgraded circuit board kit for Spa Power SP 500 / 54500 / 500A / SP500 Spa Controllers. This converts the system to the newer 500A MK II system. It uses the original touchpad, etc. Original circuit boards are no longer available and must be converted. Original touchpad still used. This kit can be used in the following models: 54500-15 54500-20 SP500A15 SP500A20
Ensure you identify your circuit board correctly:
- 54500 circuit boards have the pump and blower sockets mounted to the circuit board itself and have a manual reset hi-limit red rod.
- 500A circuit boards have pmp and blower sockets on a separate wiring loom and have a manual reset hi limit. They do not have the incoming power terminals mounted on the PCB. They use a different wiring loom to the 500mk2
- 500A mk2 circuit boards have pump and blower sockets on a separate wiring loom and have an AUTO reset hi-limit without the red reset rod. They have the incoming power terminals mounted on the PCB