| A1 | Uninstalled waste toner conveyer |
| A2 | Fuser overheating |
| A3 | Fuser heater disconnection |
| A4 | Developer unit life-fuse error |
| A5 | Main charger Arc discharge of contact has occurred.
DEV,FTR,STR bias Short circuit of contact voltage has occurred. |
| A6 | Fuser/Toner Cartridge fan is not rotating at normal speed. |
| A7 | Power supply fan error. Fan is not rotating at normal speed. |
| A8 | Ozone fan error. Fan is not rotating at normal speed. |
| A9 | Multi-Purpose Pickup Roller movement error occured. |
| B1-B6 | Feed cassette bottom plate motor error. |
| B7 | Media transfer roller movement error. Transfer roller did not reach to transfer position or home position within 0.7 sec. |
| B8 | Cyan developing unit movement error. Developer unit did not reach contact position or home position within 1 sec. |
| B9 | Magenta developing unit movement error. Developer unit did not reach contact position or home position within 1 sec. |
| C1 | Duplex communication error |
| C2 | Duplex printing registration error |
| C3 | Duplexer feeding motor error |
| C4 | DF-30 IPC communication error |
| C5 | ST-30 backup RAM error |
| D0-D4 | Firmware program downloading errors |
| E0 | Engine communication error. Parity error occurs or no response comes back from engine. |
| E1 | Main motor unlocked. It is not phase-locked and is not rotating at normal speed. |
| E2 | Laser scanner motor error. The polygon motor does not deliver a synchronous output (L) within the predetermined period of time. |
| E3 | Laser beam detection error. The photo detector board does not deliver a synchronous output (L). |
| E4 | Fuser Heater Error. |
| E5 | Eraser error. The eraser current is less than 15 mA (normally 65 mA). |
| E6 | Engine ROM check sum error. |
| E8 | Fuser unit life fuse error |
| E9 | Toner motor error. The toner motor current is 120 mA or more for one second (normally 30 mA). |
| F0 | Controller system lock error. Communication is failed between the front panel and the main controller. |
| F1 | System Checksum Error. An error is detected in the controller. The Ready-symbol and ON LINE indicators go off; and ATTENTION lights. The printer does not operate when this message is displayed. |
| F2 | RAM read/write error. Checksum is failed with the RAM on the main controller board. |
| F3 | Controller system error. |
| F4 | 29000 system ROM checksum error. |
| F5 | 29000 main RAM error. |
| F6 | 29000 system error |
