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- New Upgraded Circuit Board And Now Pump 2 Wont Work
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04-04-2014, 01:29 AM #1
My old hot tub circuit board was a balboa 51049. The heater would not heat and I determined it to be a relay was not working on the old board. My old board is discontinued and the new upgraded model is a balboa M2/M3 52518. The heater now works but pump 2 will not work. The wiring schematics are here. http://www.spacare.c...a/M3_Wiring.pdf
The hot tub is a Coleman Horizon 400 and the schematic is on the 2nd to last page/pg 25. I got a new topside panel as well so that shouldn't be the problem. Pump 1 works fine and is a 240v 2 speed however pump 2 has only 3 wires (White, Black, Green) so I assume its 120. I hooked the new board up the same way as the old board. The only thing that I can see is that the old circuit board schematic has the pumps white wire goes to the relay bar and the new one has it on a tab by the heater, so essentially it looks like the wires are switched. The white wire is also hot with 120v going through it unattached to the relay bars which I find that strange from what I know about electricity. I do not have a neutral on the hot tub as the old circuit board did not need one. I know the pump works because if I attach it to the white wire of the 240v pump, it will turn on. Anyone have suggestions? Should I add a neutral as the new schematics calls for, switch wires or any other suggestions?
04-04-2014, 06:38 AM #2
Secondary pumps are usually a single speed pump with only the three wires. The two speed main pump will have four wires for the second speed. Using the black wire for low speed and red for high speed and then the white. Your motor will have a label on it stating 120V or 220V. Even 220V motors will have three wires for a single speed application.
04-05-2014, 10:22 PM #3
So I solved the issue. I went back and looked at the schematics. I moved the white wire coming off pump 2 and put it on screw labeled for pump 2 black wire by the relays. I then took the black wire and moved it to the red line on the tabs like schematics show on the m2/m3 board. What I assume was happening was that both black and white wires were hooked up to the same power feed (Black) due to a small difference between the two different boards. Thank you very much for your time and help.
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