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Old 11-01-2021, 01:26 PM   #13
cyclones
Member
 
Join Date: Feb 2010
City & State: Ames Iowa USA
Line Voltage: 120VAC 60Hz
Posts: 69
Default Re: Motor control board

I'm going to check the linear input transformer by disconnecting it from the board and applying 120VAC to the primary windings and see what all the outputs are. If everything looks good there, I'll connect up the board to 120VAC through an isolation transformer and see what happens. Got to get the supply voltages worked out first before checking anything else.

I've gotten more information about the problem. The outputs for one motor work, but not for the other motor. The maintenance guy switched the non-working motor to the contacts for the working motor and the motor worked, so it's probably something in the output, although it might be a problem on the input side too.
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