• Code: 231
• Display: Service call 231: error
• Description: RFID reader I/F error
  Interface error with the RFID reader is detected.
  01: Communication error between the RFID reader and the engine circuit boards.
  02: Error in the wireless circuit of the RFID reader
  03: Communication error between the RFID reader and the toner cartridge.
  04: Error is detected in the RFID toner cartridge. (In more than 4)
• Remedy: 01: Same as the error no. 230 02: Replace the RFID R/W board. 03: Check for normal connection of the antenna cable. 04: Check if quantity of the toner cartridge is correct or not.

• Code: 901 ... 904
• Display: Re-start the printer. 901: error~ 904: error Note)
• Description: Abnormal temperature of belt
  901: Shortcircuit
  902: Open circuit
  903: High temperature
  904: Low temperature
• Remedy: Is the cable from belt thermistor to the high voltage board connected normally? Does this error recur?
  Re-connect the cables normally. Turn on the power again. Replace the belt thermistsor.

• Code: 918
• Display: Re-start the printer. 918: error
• Description: Duplex FAN Alarm Caution
• Remedy: Fan error inside the duplex unit. Does the error recur when the power is turned off once and back on? Does the error recur when the power is turned off once and back on?
  Check if the Duplex unit is installed normally or not. Check if the fans are installed normally or not. Replace the fan.

• Code: 923
• Display: Re-start the printer. 923: error
• Description: Black image drum lock error
• Remedy: The K ID does not rotate normally. Does the error display recur when the power is turned off once and back on?
  Check if the K ID is installed normally or not. Replace the K ID unit. Replace the K ID motor.

• Code: 928
• Display: Service call 928: error
• Description: Fuser motor lock error
• Remedy: Fuser does not rotate normally. Does this error recur?
  Check if the fuser is installed normally or not. Replace the fuser. Replace the fuser motor.

• Code: 980
• Display: Service call 980: error
• Description: Media wrapped around the fuser error
• Remedy: Media has wrapped around the fuser. Turn off the power. Replace the fuser.

• Code: 982
• Display: Service call 982: error
• Description: 4th tray detection error
• Remedy: The 4th tray is installed. Remove the 4th tray.

• Code: 983
• Display: Service call 983: error
• Description: Error due to detection of the toner cartridges of the same color
• Remedy: Two or more toner cartridges of the same color are detected. Install the cartridge of the specified in the specified position.