What is The Joint Commission standard for performing weekly maintenance on generators?

Any examples are for illustrative purposes only. 

NFPA 110 (2010 edition) Emergency and Standby Power Systems contains an EPSS Maintenance Schedule in Annex A that outlines the procedure and frequency for testing, inspection, and maintenance of the various components of an Emergency Power Supply System.

The requirements for the weekly emergency generator inspection required by EC.02.05.07 EP4 include an inspection of the prime mover, fuel system, lubrication system, cooling system, exhaust system, battery system, and electrical distribution system up to the automatic transfer switches. Running unloaded is not required and is discouraged because it can result in long-term problems such as wet stacking.