• Code: C3-4512
• Display: Cyan imaging unit is not compatible. Check user's guide
• Description: Cyan drum unit is not compatible.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the cyan drum unit. Check if the drum unit is compatible with the machine. 4) If the drum unit is not a samsung genuine, replace it with a new one.

• Code: C3-5110
• Display: Prepare new cyan imaging unit
• Description: Cyan drum unit has almost reached the end of its life.
• Remedy: 1) Order new cyan drum unit because drum unit with level of “Low” will be exhausted soon.

• Code: C3-5130, C3-5140
• Display: End of life, Replace with new magenta imaging unit
• Description: Cyan drum unit is at the end of its life.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the cyan drum unit. 4) Install the new cyan drum unit(CLT-R809). 5) Clean the LSU window. 6) Install the waste toner container. 7) Close the front cover.

• Code: C3-5411
• Display: Black imaging unit is not installed. Install it.
• Description: The black drum unit is not installed. / The CRUM data is not detected.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove and reinstall the black drum unit 4) Install the waste toner container. 5) Close the front cover.

• Code: C3-5512
• Display: Black imaging unit is not compatible. Check user's guide
• Description: Black drum unit is not compatible.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the black drum unit. Check if the drum unit is compatible with the machine. 4) If the drum unit is not a samsung genuine, replace it with a new one.

• Code: C5-1110, C5-1120
• Display: Prepare new transfer belt unit. Replace new transfer belt unit.
• Description: The life of the ITB Unit expires soon or has expired.
• Remedy: 1) Turn the machine off. 2) Replace the ITB Unit (JC96-06660A). 3) Turn the machine on. 4) Enter SVC mode. • To enter SVC mode, press 1,2,3 number keys simultaneously. When the password dialog box appears, enter “1934” and press the “OK” button. 5) Select “TRANSFER” (INFORMATION > Supply Status > Field Replacement Unit > TRANSFER) 6) Select “ITB Roller”. The “RESET” button will be activated. Click “RESET” to clear the ITB count. 7) Exit SVC mode by pushing the home button.

• Code: C6-1310
• Display: Fuser unit is not installed. Install it.
• Description: The fuser unit is not installed or fuser unit connector is not connected properly.
• Remedy: 1) Turn the machine off then on. 2) If the problem persists, turn the machine off again. 3) Open the side cover. Check if the fuser unit is installed. If not, install the fuser unit. 4) If the fuser unit is installed, remove it. 5) Check if the fuser draw connector (JC39-01677A) is broken or defective. 6) Install the fuser unit. 7) If the problem persists, replace the fuser unit(JC91-01063A(220V) / JC91-01064A(110V).

• Code: C7-1110, C7-1130
• Display: Waste toner container is almost full. Order new one. Waste toner container is full. Replace it.
• Description: The life of the waste toner container expires soon or has expired.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container(CLT-W809). Install a new waste toner container. 3) Close the front cover.