ERROR CODE BROTHER HL 2400
| Code | Description |
| C3 | NVRAM Error (MCTL PCB) |
| C4 | Engine Controller MCTL PCB Hardware Error |
| C7 | Process Timing Clock Error (Main Motor Clock Error) |
| D1 | Clutch Error of the Yellow Developing Unit |
| D2 | Clutch Error of the Magenta Developing Unit |
| D3 | Clutch Error of the Cyan Developing Unit |
| D4 | Clutch Error of the Black Developing Unit |
| D5 | HPSI Signal Error (Retract Error of Black and Yellow Toner Cartridge) |
| D6 | HPSI Signal Error (Retract Error of Cyan and Magenta Toner Cartridge) |
| E1 | Developing Motor Error |
| E2 | Main Motor Error |
| E3 | Transfer Drum Rotational Error |
| E4 | Toner Sensor PCB Error |
| E5 | Transfer Roller Solenoid Error |
| E6 | Brush Cleaner Solenoid Error |
| E7 | Brush Cleaner Clutch Error |
| E8 | Fusing Unit Clutch error |
| E9 | Belt Sensor Error |
| EL | Erase Lamp Error |
| Code | Description |
| F0 | Control Fan Error |
| F2 | Ozone Fan (1) Error |
| F4 | Fuser Fan Error |
| F5 | Charging HV (DC High Voltage) Error |
| H0 | Fuser Thermistor Error |
| H2 | Fusing Temperature Error (Warming-up Time Error) |
| H3 | Fusing Temperature (3) Error (Heater Continuous ON Time Error) |
| H4 | Fusing Temperature (4) Error (Heater Continuous ON Time Error) |
| L1 | Beam Sensor Error |
| L2 | Scanner Motor Error |
| LL | Laser Power Error |