Front loader won't spin

I have a GE frontload washer, model WBVH6240F that will not spin or tumble. (It drains fine.) When I put it in test mode, I got an error code 54 (on the spin test). I know this has to do with the internal motor, but does it mean that I’m gonna have to replace the whole motor?

Use this service manual to see if you can check out the inverter.

http://appliancejunk.com/ge/washer/31-9135.pdf