I recently had an A.O. Smith (aka Magnatek) 2 speed pump motor (B984) on my Challenger main pump go bad and replaced it with the same, but newer model (A.O. Smith B2984). I had 4 wires connected to the old motor: 1 green, 1 red, 2 black. The green goes to ground, and based on how it was wired on the old motor, the red went to the L2 terminal (common?) and the blacks went to the L1 (high) and A (low) terminals.
The motor works well, but when I switch from high speed to low speed (using a Compool Cp3600 pool-spa control system), the motor still runs, but it looks & sounds like it is still on high speed. So basically, whether I push the high or low speed button on the control pad, it operates on high speed.
How can I determine if I have the wiring correct? How do I know if the red wire is common, and which of the 2 black wires go to either the L1 or A terminal? I have a meter than I can test voltage with if needed.
Here is a tech drawing of the motor: http://drawings.aosmithmotors.com/De...emNumber=B2984