• Code: F21-01
• Description: Wire cleaning abnormality
  The lock signal for M14 (charger cleaning) is not detected when more than 25 seconds have passed since the return motion (back to front) of M14 has started.
• Causes: M14 (charger cleaning) PRCB (printer control board)

• Code: F21-02
• Description: Wire cleaning abnormality
  The lock signal for M14 (charger cleaning) is detected within 2 seconds since the return motion (back to front) of M14 has started.
• Causes: M14 (charger cleaning) PRCB (printer control board)

• Code: F21-03
• Description: Wire cleaning abnormality
  The lock signal for M14 (charger cleaning) is not detected when more than 25 seconds have passed since the return motion (back to front) of M14 has started while re-try process is in motion after lock detection.
• Causes: M14 (charger cleaning) PRCB (printer control board)

• Code: F21-05
• Description: Wire cleaning abnormality
  The lock signal for M10(transfer/separation cleaning) is not detected when more than 25 seconds have passed since the return motion (back to front) of M10 has started.
• Causes: M10 (transfer/separation cleaning) ADUDB (ADU drive board) PRCB (printer control board)

• Code: F21-06
• Description: Wire cleaning abnormality
  The lock signal for M10 (transfer/separation cleaning) is detected within 2 seconds since the return motion (back to front) of M10 has started.
• Causes: M10 (transfer/separation cleaning) ADUDB (ADU drive board) PRCB (printer control board)

• Code: F21-07
• Description: Wire cleaning abnormality
  The lock signal for M10 (transfer/separation cleaning) is not detected when more than 25 seconds have passed since the return motion (back to front) of M10 has started while re-try process is in motion after lock detection.
• Causes: M10 (transfer/separation cleaning) ADUDB (ADU drive board) PRCB (printer control board)

• Code: F22-01
• Description: Fan abnormality
  An error for SFAN_EM signal is detected when 2 seconds have passed since FM4 (developing suction) has turned ON. The error does not clear after 2 seconds from the OFF/ON operation.
• Causes: FM4 (developing suction) PRCB (printer control board)

• Code: F22-02
• Description: Fan abnormality
  An error for CLEAN_EM signal is detected when 2 seconds have passed since FM5 (cleaner cooling) has turned ON. The error does not clear after 2 seconds from the OFF/ON operation.
• Causes: FM5 (cleaner cooling) ADUDB (ADU drive board) PRCB (printer control board)