Gem error code -51

What does this code indicate?

51 - motor controller voltage low electrical fault check voltage, see
manual

See my complete list of error codes here:

http://www.electricforum.com/cars/neighborhood-electric-vehicles-hev/2486-complete-list-gem-error-codes.html

Daniel

Hello members. I just bought a new controller from fsip and still get an error code 51 and 57. The contactor engages…Wheels turn about 1 revolution and the wrench and code comes on. Any ideas my friends ?