Hi guys.
I am having a hard time figuring out which relay controls the heater and which relay is the thermostat.
Measuring for AC volt I have 0 volt out from the board to the heater. I have set the controller in a way that heating should start. Controller temp sat to 38’C, water temp is 15’C.
Flow through heater is ok.
I think it must be one of the small relays, but Im not sure. I think its K6 and K7 but cant find any references on internet.
When the spa is on, I measure 12Vdc for the coil on both relays. So in my opinion both relays should be energised and close the contact. Only K7 is closed while K6 is open. When I turn the power of and measure across the contacts, both are open.
Anybody know which relay is which?
regards
Bjørn😊