Fuji Xerox ApeosPort-VI C7771 Administrator's Manual page 607

Error Code
021-520 [Cause] An error occurred while connecting to the EP system via the
Internet.
021-521
021-522
[Remedy] Check the followings:
Check the following for BB-Direct configuration:
If the error still is not resolved after checking the above settings,
there may be a network failure or the DNS server failure. Consult
your system administrator. If the network works normally but
the error still is not resolved, contact our Customer Support
Center.
021-523 [Cause] An error occurred while communicating with the EP server.
[Remedy] Enable the SOAP port, switch off the machine power, make sure
that the touch screen is blank, and then switch on the machine
power. If the error still is not resolved, contact our Customer
Support Center.
021-524 [Cause] An error occurred while communicating with the EP server.
021-525
[Remedy] Switch off the machine power, make sure that the touch screen
021-526
is blank, and then switch on the machine power. If the same
021-527
message is displayed again, contact our Customer Support
Center.
021-528
021-529 [Cause] The machine attempted to upgrade the software of EP system
via the Internet, but the latest software version is already
installed.
[Remedy] Contact our Customer Support Center.
021-530 [Cause] An error occurred while connecting to EP system via the
Internet.
021-531
[Remedy] Wait for a while, and then execute the operation again. If the
error still is not resolved, contact our Customer Support Center.
021-532
[Cause] The machine attempted to upgrade the software of EP system
via the Internet, but the software upgrade failed.
021-533
021-534
[Remedy] Contact our Customer Support Center.
021-535
021-536
[Cause] The latest software version is not installed.
[Remedy] Reboot the machine and update the software to the latest
version. (The machine automatically reboots again.) Then,
execute the operation again.
021-538 [Cause] The software upgrade was canceled since the machine was in
use at the reserved time.
[Remedy] Check with your system administrators. If the system
administrators have not reserved the update, contact our
Customer Support Center.
Cause and Remedy
LAN cable connection
DNS server address setting
The default gateway setting
The subnet mask setting
EP proxy server setting
Error Code
15
607