• Code: 180 ... 186
• Display: Service Call 180: Error ~ 186: Error
• Description: Communication disability with option unit detected by engine.
• Remedy: 1) Is error message displayed? 2) Does error reoccur?
  Turn ON power again. Replace option unit.

• Code: 187
• Display: Service Call 187: Error
• Description: Communication with control panel disabled.
• Remedy: Is cable properly connected to control panel? Connect properly. Replace control panel and cable.

• Code: 310
• Display: Close cover 310: Top cover open
• Description: Printer engine cover open.
• Remedy: 1) Check if top cover is open. 2) Check if cover switch is proper.
  Close top cover. Close side cover. Replace cover switch.

• Code: 320
• Display: Reset fuser 320: Fuser error
• Description: Same unit not detected upon power ON or opening cover.
• Remedy: 1) Is error message displayed? 2) Is fuser unit set properly? 3) Does error reoccur?
  Check if fuser is set properly. Reset fuser and turn ON power again. Replace fuser unit assembly.

• Code: 321
• Display: Turn power OFF and wait 321: MOTOR OVERHEAT
• Description: Printer cannot be used temporarily due to motor overheat.
• Remedy: Turn ON power after a while.

• Code: 323
• Display: Open/close cover 323: Paper thickness error
• Description: Sensor output out of range with no media. (Only for Factory Mode)
• Remedy: 1) Are foreign objects mixed in sensor? 2) Does printer recover when detecting paper thickness by opening/closing tray? 3) Does printer recover by power OFF/ON.
  Remove foreign objects. Normal.

• Code: 324
• Display: Open/close cover 324: Paper thickness error
• Description: Sensor output gap out of range with no media. (Only for Factory Mode)
• Remedy: 1) Are foreign objects mixed in sensor? 2) Does printer recover when detecting paper thickness by opening/closing tray? 3) Does printer recover by power OFF/ON.
  Remove foreign objects. Normal.

• Code: 325
• Display: Open/close cover 325: Paper thickness error
• Description: Media detect value out of range.
• Remedy: 1) Is different media type mixed in? 2) Is media being double fed?
  Remove foreign objects.