| Main Code | Sub Code | Trouble Description |
| L1 | - | The forward scan is not completed within 10 sec. after the mirror starts moving. |
| L2 | 1 | Mirror motor lock |
| 2 | Mirror home position sensor (MHPS) trouble |
| L3 | - | Mirror returning is not completed within 10 sec from the initial start in the case of mirror initialization and from the completion of copying in the case of copying operation. |
| L4 | - | No PT (Pulse Timer) Signal |
| L5 | 0 | Lens move is not completed within 12.5 sec after the lens started to move. |
| 1 | No. 4/5 mirror stepping motor trouble |
| 2 | No. 4/5 mirror home position sense trouble |
| 4 | Lens stepping motor trouble |
| 8 | Lens home position sense trouble |
| L6 | - | Rotary cassette position sense failure |
| L8 | - | Full wave signal abnormality |
| L9 | 11 | Sorter home position is not detected within 10 sec from resetting the sorter home bin. |
| 13 | The standby position is failed to keep after shift operation completed within 1.1 sec after sorter 1-bin shift operation. |
| P1 | - | Open copy lamp thermal fuse |
| H1 | - | Open upper thermal fuse |
| H2 | - | Open upper heater thermistor or the fusing unit is not installed when the door is closed. |
| H3 | - | Heat roller abnormally high temperature |
| H4 | - | The set temperature is not reached within 90 sec after turning on the power (the heater lamp lights up after 1 sec from turning on the power relay). After reaching the specified temperature, abnormal temperature is detected. |
| H5 | - | Open lower thermal fuse |
| H6 | - | Open lower heater thermistor or the fusing unit is not installed when the door is closed. |
| U1 | - | Low battery voltage for backup memory |
| U2 | - | Sum check error in the backup memory counter |
| U3 | - | Auto Exposure sensor trouble |
| U5 | 0 | ADF communication trouble |
| 1 | ADF motor drive failure |
| EE | - | Automatic developer adjustment trouble |
| EL | - | Sensor level input error (Over toned) |
| EU | - | Sensor level input error (Under toned) |
| CC | - | Document sensor trouble. |
| CH | steady | Door switch is not turned on. (The interlock switch is ON.) |
| CH | blink | The DV tank is not installed. |
| PC | - | Personal counter is not installed or is disconnected. |
