DRed81

G,day, I am new here and have inherit a 30yo vectra ii in almost immaculate condition besides a few minor teething issues. I am in australia where they were delivered shipped over from the USA without the electrical components (we're 240v), which were sourced locally, fitout and finally sold. I have found all mechanical schematics online but nothing electrical and I am getting no email response from the pump/control manufacturer Finsbury pumps. My questions mostly revolve around the pump operation and how I should expect it to behave as there is a slight inconsistancy in its operation. Blower works fine and the spa heats up quite nicely. Main pump air button first press turns the pump on full and draws 4.5A (rated motor current draw is 5A). 2nd press takes it to a slow speed and draws 8A(????). 3rd press sees no physical change however the current drops to 1.2A (which is the rated current draw for the slow speed). 4th press turns it all off. The inconsistancy is that one cycle through the button sequence will act as above and on the next cycle through it will switch off on the 2nd press and act the same on the 1st, 3rd and 4th. I suspect that different operation on the 2nd press varies based on the temp setpoint being above or below the water temp but I am looking for confirmation or thoughts on what else could cause this. How much should I be running this in order to chemically maintain it correctly? 1.2A current draw is going to add up quite quickly if I leave it on the slow setting when not in use. Should I consider wiring a timer into the slow setting? There is a slight leak from the backside of the pump assembly so I intend to take out and have a look at this shortly, it would be the ideal time to look at installing a timer. Another option in my mind is to install a tiny circulation pump and a check valve in parallel with the main pump and have that on a timer to stir the water up for a few hours per day. This would save $$ on running costs plus the current motor makes quite a loud hum when in slow mode. Thoughts? Issues? Long term my intention is to install a new (read efficient) pump/heater combo and I am looking at wiring up some kind of DIY closed loop temp control. Maybe an arduino controller with a repurposed LCD spa display would be nice, any tips or links on this would be greatly appreciated. TIA Dan