| Code | Description |
|---|
| A1 | Document in ADF |
| A1-8 | Main board received reset signal |
| A2 | ADF jams |
| A6 | ADF registration jam |
| A7 | ADF interlock |
| A9 | Tray 1 jam |
| C1 | Tray 2 jam |
| C2 | Tray 3 jam |
| C3 | Bypass feed jams |
| C4 | Machine has reset |
| E1 | Jam |
| E1-5 | Clamshell interlock |
| E1-6 | Right side interlock |
| E1-7 | Two tray interlock, or duplex interlock |
| E1-8 | Sorter interlock |
| E1-9 | Copy cartridge interlock |
| E1 or E1-0 | Registration jam |
| E2 | Reset signal happened |
| E3 | Jam in transfer area |
| E4 | Exit jam |
| E4-0 | Exit jam |
| E4-5 | Clamshell interlock |
| E4-6 | Right side interlock |
| E4-7 | Two tray interlock |
| E4-8 | Sorter interlock |
| E4-9 | Copy cartridge interlock |
| E5 | Clamshell interlock |
| E6 | Right side interlock |
| E9 | Copy cartridge interlock |
| F3-1 | Sorter bin home switch |
| F3-2 | Sorter cam switch |
| F3-3 | Sorter cam switch |
| F5 | Sorter interlock |
| J1-1 | Add toner |
| J1-2 | Temporary low toner signal |
| J2-1, J2-2 | Replace copy cartridge |
| J5, J6 | ADF to machine communications problem |
| L2 | 2000 copies left on cartridge |
| L3 | ADF to machine communications problem |
| L4 | (flashing) 1000 copier left on fuser web |
| L6 | Auditron or other counter problem |
| LL | Main board. Try simulation 1.1 to initialize |
| rc | Wrong operation panel installed |
| rr | Bad EPROM on main board. Try 1.1 |
| U0 | Main board |
| U2 | Scan problem |
| U2-1 | Scan home |
| U2-2 | Scan home or scan encoder |
| U2-4 | Scan home or scan dual page sensor |
| U2-7 | Scan home |
| 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 |
