| Code | Description |
|---|
| A1 | Document is ADF |
| A1-8 | Main board received reset signal |
| A2 | ADF jams |
| A6, A7 | ADF jams |
| A9 | ADF jams |
| C1 - C4 | Feed jam |
| C5-1 to C5-4 | Jams in various areas |
| C5-2 | Jams in various areas |
| C5-3 | Jams in various areas |
| C5-4 | Duplex jam |
| E0 | Machine has reset |
| E1 | Jam |
| E1-E0 | Registration jam |
| E1-E5 | Clamshell interlock |
| E1-E6 | Right side interlock |
| E1-E7 | Two tray interlock |
| E1-E8 | Sorter interlock |
| E1-E9 | Copy cartridge interlock |
| E2 | Reset signal happened |
| E3 | Jam |
| E4 | Exit jam |
| E4-10 | Exit jam |
| E4-5 | Clamshell interlock |
| E4-6 | Right side interlock |
| E4-7 | Two tray interlock. Duplex interlock |
| E4-8 | Sorter interlock |
| E4-9 | Copy cartridge interlock |
| E5 | Clamshell interlock |
| E6 | Right side interlock |
| E7 | Duplex interlock |
| E9 | Copy cartridge interlock |
| F3-1 | Sorter bin home switch |
| F3-2 | Sorter cam switch |
| F3-3 | Sorter cam switch |
| J1-1 | Add toner |
| J1-2 | Temporary low toner signal |
| J2-0 | Replace copy cartridge |
| L2 | 2000 copies left on copy cartridge |
| L3 | ADF to machine communication problem |
| L4 (flashing) | 1000 copies left on fuser web |
| rr | Bad EPROM on main board |
| U0 | Main board |
| U2 | Scan problem |
| U2-1 | Scan home |
| U3-00 | Cam drive problem |
| U3-01 | Cam movement slow |
| U3-04 | Main board to duplex communication |
| U3-09 | Cam problem |
| U3-12 | Jogger problem |
| U3-19 | Cam problem |
| U3-21 | Cam problem |
| U3-23 | Cam problem |
| U3-29 | Cam problem |
| U3-32 | Cam problem |
| U3-34 | Cam problem |
| U3-39 | Cam problem |
| U3-43 | Cam problem |
| U3-45 | Cam problem |
| U3-49 | Cam problem |
| U3-54 | Cam problem |
| U3-56 | Cam problem |
| U3-59 | Cam problem |
| U4-1 | Fuser problem. Long warm up |
| U4-2 | Low fuser temperature after warm up |
| U4-3 | High fuser temperature |
| U4-4 | Open fuser thermistor |
| U4-6 | Replace fuser web |
| U4-7 | Thermistor signal problem |
| U7-1 | Copy cartridge belt drive problem |
| U9-3 | Exposure lamp problem |
| U9-4 | Toner motor |
| U9-5 | Problem in warm up |
