• Code: C3-2512
• Display: Yellow imaging unit is not compatible. Check user's guide
• Description: Yellow drum unit is not compatible.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the yellow 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: C3-3110
• Display: Prepare new magenta imaging unit
• Description: Magenta drum unit has almost reached the end of its life.
• Remedy: 1) Order new magenta drum unit because drum unit with level of “Low” will be exhausted soon.

• Code: C3-3130, C3-3140
• Display: End of life, Replace with new magenta imaging unit
• Description: Magenta drum unit is at the end of its life.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the magenta drum unit. 4) Install the new magenta drum unit(CLT-R809). 5) Clean the LSU window. 6) Install the waste toner container. 7) Close the front cover.

• Code: C3-3411
• Display: Magenta imaging unit is not installed. Install it.
• Description: The magenta 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 magenta drum unit 4) Install the waste toner container. 5) Close the front cover.

• Code: C3-3512
• Display: Magenta imaging unit is not compatible. Check user's guide
• Description: Magenta drum unit is not compatible.
• Remedy: 1) Open the front cover. 2) Remove the waste toner container. 3) Remove the magenta 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: C3-4110
• 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: C3-4130, C3-4140
• 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: C3-4411
• Display: Cyan imaging unit is not installed. Install it.
• Description: The cyan 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 magenta drum unit 4) Install the waste toner container. 5) Close the front cover.