As of 2015, EdgeStar's website has manuals for several different ice maker models specific to that brand. Manuals Online is also a good place to search for ice maker user manuals.
EdgeStar lists PDF manuals for several different portable ice maker models. Along with the basic owner's manuals, there is information about troubleshooting and do-it-yourself repair. This website also has instructional videos that deal with setup and repair of EdgeStar ice makers.
Acme Parts hosts another website with a selection of instructions for repairing ice makers. These instructions are generic and may be helpful if the user is somewhat familiar with ice maker parts, or if a brand-specific repair manual cannot be located.