| Error Code | Description |
| E-0 | Incomplete signal frame |
| E-1 | Cannot recognize signal |
| E-2 | Line disconnected due to poor quality connection |
| E-3 | Line disconnected due to poor quality connection |
| E-4 | Line disconnected during multi-page communication |
| E-5 | The line was hung up without a reply |
| E-6 | Cannot recognize communication signal |
| E-7 | No response on remote side |
| E-8 | Error occurred but after all pages were sent or received |
| E-9 | Error occurred as switch from transmission to reception was occurring |
| E-10 | Error- partial page |
| E-11 | Cannot connect due to poor quality connection |
| E-12 | Error occurred just after fallback, disconnected |
| E-13 | Error occurred after the retransmission end command was received |
| C-1 | Heater error |
| C-2 | Laser failure |
| C-3 | Polygon motor failure |
| C-4 | Cooling fan error |
| C-5 | PCU communication failure |
