Sorry about the problems with your generator, troubleshooting can be fun...
A little poking around this web thing led me to the Owners Manual for this series of generator http://www.cumminsonan.com/www/pdf/m.../981-0159D.pdf
Looking down to the Troubleshooting Section I found Code 32 section. Check the cleanliness and tightness of the battery terminals and the cable connections on the starter.
It is really amazing how badly a little corrosion can affect 12v systems.
Here is the Factory Service Manual if you like.
Hope this helps,
Chris in Virginia
2006 Sunseeker 3100SS/LTD
2008 Smart Passion Cabriolet TOAD
1986 Honda Helix (Original owner)