Panasonic DP-C321 Service Handbook page 181

Turn the power On/Off and perform the following if
the problem persists.
Replace the ESS PWB (PL13.1).
103-338 Same Font ROMs Found
[Detection Conditions]
[Detection Conditions] The system detected that the
same FONT ROM was installed.
[Actions]
Check the FONT ROM. If the trouble persists, execute
the following:
Replace the ESS PWB (PL13.1).
103-339 ROM DIMM of Another Product Found
[Detection Conditions] The system detected that the ROM
DIMM for another machine was installed.
[Actions]
[How to detect] Check the ROM DIMM and install
the appropriate ROM DIMM.
If the trouble persists, execute the following:
Replace the ESS PWB (PL13.1).
103-372 IOT sc Soft Failure
[Detection Conditions]
IOT Controller software failure
Due to an error during the software processing, the
subsequent processes cannot be performed.
[Actions]
Turn the power On/Off and perform the following if
the problem persists.
(1) Perform the re-installation of the ESS software.
(2) Replace the ESS PWB (PL13.1).
103-701 Changed Output Bin: Side to Center
[Detection Conditions] The output tray was changed
(Side Tray to Center Output Tray).
[Actions] No actions.
103-702 Changed Output Bin: Finisher to Center
3-107
[Detection Conditions] The output tray was changed
(Finisher Tray to Center Output Tray).
[Actions] No actions.
Chapter 3 Troubleshooting