• Code: 1802
• Description: A communication error occurred between the ASIC and T3LT control PCB ASSY in the engine. (LT only)
• Remedy: 1 Malfunction of the LT control PCB Install the latest main firmware. 2 An LT/TT connector failure (machine side or LT side) Replace the appropriate LT/TT connector of the machine side or LT side. 3 An LT control PCB failure Replace the appropriate LT control PCB. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 1808
• Description: A communication error occurred between the ASIC and TT control PCB in the engine.
• Remedy: 1 Malfunction of the TT control PCB Install the latest main firmware. 2 LT/TT connector failure (machine or TT side) Replace the LT/TT connector on the machine side or TT side. 3 TT control PCB failure Replace the TT control PCB. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 1901
• Description: Detected a TT motor failure.
• Remedy: 1 Malfunction of the TT control PCB Install the latest main firmware. 2 Connection failure of the TT motor harness Reconnect the TT motor harness. 3 LT/TT connector failure (machine side or TT side) Replace the LT/TT connector of the machine side or TT side. 4 TT motor failure Replace the TT motor. 5 TT control PCB failure Replace the TT control PCB. 6 Main PCB failure Replace the main PCB ASSY.

• Code: 1F00
• Description: When the TT was connected, TT balance sensor L/R wasn't connected properly.
• Remedy: 1 Connection failure of the TT balance sensor L/R harness. Reconnect the TT balance sensor L/R harness or relay connector harness. 2 TT balance sensor L/R attachment failure Reattach the TT balance sensor L/R. 3 LT/TT connector failure (machine side or TT side) Replace the LT/TT connector of the machine side or TT side. 4 TT balance sensor L/R failure Replace the TT balance sensor L/R. 5 TT control PCB failure Replace the TT control PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY.

• Code: 3801
• Description: A temperature error occurred in the external temperature/humidity sensor.
• Remedy: 1 Connection failure of the external temperature/humidity sensor harness Reconnect the external temperature/humidity sensor harness. 2 External temperature/humidity sensor failure Replace the main frame L ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 4000
• Description: The number of rotations of the drum unit is reaching the upper limit.
• Remedy: 1 Replace the drum unit with a new one and reset the drum counter. If the error display is not cleared, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 4200
• Description: The number of rotations of the drum unit has reached the upper limit. (Printing does not stop.)
• Remedy: 1 Replace the drum unit with a new one and reset the drum counter. If the error display is not cleared, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 4500
• Description: The number of printable pages of the fuser unit has reached the upper limit.
• Remedy: 1 End of life of the fuser unit Replace the fuser unit. Reset counters for consumable parts (function code: 88) to reset the fuser unit counter after the replacement. 2 Replace the fuser unit with a new one and reset the fuser unit counter. If the error display is not cleared, the main PCB is faulty. Replace the main PCB ASSY.