• Code: 134
• Description: LED head fault detected. (134=K)
• Remedy: Is LED head properly set? Does error reoccur?
  Set properly for LED head unit. Turn power ON agein. Replace LED head unit

• Code: 155
• Description: Fuser unit fuse cannot be disconnected.
• Remedy: Is fuser unit set properly? Does error reoccur?
  After cleaning for fuser connector, reset. Turn power ON again. Replace the PU/ CU board.

• Code: 163
• Description: Error detected by toner sensor. (163=K) This error does not occur with the factory default settings.
• Remedy: Is toner cartridge setting? Is toner lock lever setting? Does error reoccur?
  Set toner cartridge. Turn a lock lever of toner to a fixed position. Replace toner sensor or assembly.

• Code: 166
• Description: An abnormality was detected with the power supply temperature thermistor. 01: Short 02: Open 03: High temp. 04: Low temp.
• Remedy: 01, 02: Does error reoccur? Does error reoccur? Does error reoccur? 03: Does error reoccur? Does error reoccur? Does error reoccur? 04: Does error reoccur? Does error reoccur? Does error reoccur?
  Power Off/On. Replace the low voltage power supply unit. Replace the PU/ CU board. Replace the cable between the low voltage power supply unit and the PU/CU board. Remove anything obstructing the ventilation slots if any and restore the power. Replace the low voltage power supply unit. Replace the PU/ CU board. Replace the cable between the low voltage power supply unit and the PU/CU board. Raise the room temperature and restore the power. Replace the low voltage power supply unit. Replace the PU/ CU board. Replace the cable between the low voltage power supply unit and the PU/CU board.

• Code: 167
• Description: ThermistorSlope Error
• Remedy: Is the error message displayed? Does error reoccur?
  Power Off/On. After leaving the printer for 30 minutes, turn on the printer again.

• Code: 168
• Description: Compensation Thermistor Error
  01: Short 02: Open 03: High temp. 04: Low temp.
• Remedy: Is the error message displayed? Does error reoccur?
  Power Off/On. After leaving the printer for 30 minutes, turn on the printer again.

• Code: 169
• Description: Upper Side Thermistor Error 01: Short 02: Open 03: High temp. 04: Low temp.
• Remedy: Is the error message displayed? Does error reoccur?
  Power Off/On. After leaving the printer for 30 minutes, turn on the printer again.

• Code: 170, 171
• Description: Short circuit in fuser thermistor or open detected.
• Remedy: Does error reoccur? Yes Power Off/On. Replace the fuser unit.