• Code: 601
• Description: Communication Error between BCU and MCU (D016/D097 only) One or more of the following occurred: • The BCU cannot communicate with the MCU (LCT-MF) within 100 ms after power on after 3 tries. • A BREAK signal was detected after connection between the BCU and MCU. • After a communication error, three tries to communicate with the MCU failed.
• Causes: • Poor connection between BCU and MCU • BCU defective • MCU defective
• Remedy: 1. Check or replace the harness between the BCU and MCU. 2. Replace the BCU. 3. Replace the MCU in the LCT-MF.

• Code: 610
• Description: Mechanical counter error: K. This SC is only for NA models. The machine detects the mechanical counter error.
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy: Check or replace the mechanical counter.

• Code: 611
• Description: Mechanical counter error: FC. This SC is only for NA models. The machine detects the mechanical counter error.
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy:

• Code: 620
• Description: ADF Communication Error (D016/D097 only) No reponse from the ADF to the ACK signal issued by the IPU.
• Causes: • Poor connection between the IPU and ADF • Electrical noise interfering with communication between electrical components • ADF cable or connector loose, broken, defective • ADF defective • IPU defective
• Remedy: 1. Check or replace the cable between IPU and ADF. 2. Replace the ADF. 3. Replace the IPU.

• Code: 621
• Description: Finisher communication error. While the IOB 2 communicates with an optional unit, an SC code is displayed if the IOB 2 receives the break signal which is generated by the peripherals only just after the main switch is turned on.
• Causes: • Ring Binder (D392) or Perfect Binder (D391) is installed in the D097 or M078 model. • Finisher I/F cable problems • PSU-G problems in the machine • IOB 2 problems • BCU problems
• Remedy: 1. Remove the Ring Binder (D392) or Perfect Binder (D391) from the D097 or M078 model. 2. Check if the finisher I/F cables are correctly connected. 3. Replace the PSU-G if no power is supplied to peripherals. 4. Replace the IOB 2. 5. Replace the BCU.

• Code: 623
• Description: 2nd LCT communication error While the IOB 2 communicates with an optional unit, an SC code is displayed if the IOB 2 receives the break signal which is generated by the peripherals only just after the main switch is turned on.
• Causes: • LCT I/F cable problems • LCT power supply harness problems • IOB 2 problems • BCU problems
• Remedy: 1. Check if the LCT I/F cable is correctly connected. 2. Check if the harnesses of the LCT are correctly connected. 3. Replace the IOB 2. 4. Replace the BCU.

• Code: 625
• Description: RCB module version error The RCB module version in the main machine does not match the one in the LCT.
• Causes: • Incorrect registration unit installed
• Remedy: Install the correct registration unit.

• Code: 626
• Description: BCU-RCB communication error The BCU does not receive an OK signal from RCB for a certain time after sending a command to it and the BCU still does not receive an OK signal after sending the command 3 times.
• Causes: • Registration drawer connection defective • RCB software not installed correctly • Defective BCU • Defective RCB
• Remedy: 1. Check the connection between the above devices. 2. Replace the RCB. 3. Replace the BCU.