Paxman;

Welcome to ECN!

With a little back-and-forth posting, I believe we may get this issue resolved.

First off, you will need to be able to access the Motor, so as to trace its Circuitry correctly.
If the Motor is remotely located, you will need to access it directly.

This Motor should be a Capacitor-Start type, as it is 2.0 Horsepower.
There will be a Single "Pop-Up" enclosure on top of the Motor, which is the housing for the Start Capacitor.
If the Motor is a "Dual-Capacitor" type (Capacitor-Start / Capacitor-Run), there will be Two of the pre mentioned "Pop-Ups" on top of the Motor Frame.
If there are no "Pop-Ups", please indicate this in your reply.

In addition, if you could post the Motor's Nameplate Data, this would be helpful.
Looking for any hints!

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1:

First test to perform is to identify the Start Circuit.
This is done by disconnecting the Capacitor's leads, and tracing the Start Winding's Circuitry.

With the Capacitor leads disconnected, trace continuity between one of the Cap leads, and one of the wires in the Cord (the cord with Six lead wires).
When you find any continuity, mark down the lead colors.
Do the same with the remaining Cap lead.

Now you have the Start Circuit identified. The Start Circuit is what determines the Rotor's direction, and is what will be connected "opposite" to reverse direction.

BTW, the colors for the Start Circuit should be Black & Red (most NEMA Motors apply, however some Definite Purpose Motors are different.)

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2:

Determine the Run Winding leads.

Check for continuity between these following lead combinations:

  • Blue and White,
  • Blue and Orange,
  • White and Orange.


There _Should_ be continuity between all three combos above.
If so, the Orange lead _Should_ be the Center Tap lead from the Main (Run) Winding, which feeds the Start Circuit; and the Blue + White leads _Should_ be the Main Winding's L1 & L2 leads.

This is where things get tricky!
If the Center Tap is NOT the Orange lead, connecting the Motor's Blue & White leads to a 230V Circuit will eventually fry the Main Winding, while Impeding the Start Circuit.
This is due to 1/2 of the Main Winding being connected to 230V.

Please keep this in mind when determining the connections of the Main Winding!!!

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3:

Here are a few Schematics of the Motor connections.

Attached Images
SMPMTR_FORWARD.gif SMPMTR_REVERSE.gif

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!