Fujitsu iScanner fi-6010N Operator's Manual page 636

Code
13901
13902
13903
13904
598
Message
Scheduler could not be started. (XXXX)
Schedule notification failed. (XXXX)
Schedule (XXXX) expired and was
deleted. [XXXX] events
Error has occurred. (XXXX)
Action
Restart the iScanner Central
Admin service.
Check the operating status of the
Web site using IIS Manager.
If the operating system of the
Central Admin Server is either
Windows Server 2003 or Windows
Server 2008, check the operating
status of the Web site
"AmService" and the application
pool "AmService".
If the operation system of the
Central Admin Server is Windows
2000 Server, check the operating
status of the Web site
"AmService".
The release schedules for seven or
more days ago were deleted.
Check the status of updates to the
scanner, and issue any necessary
update calls to scanners with
"Pending" status.
Restart the iScanner Central
Admin service.