• Code: C001
• Description: Memory copy PCB 1 communication problem • Problems with data from memory copy PCB 1.
• Causes: Defective memory copy PCB 1.
• Remedy: Replace memory copy PCB 1 and check for correct operation.

• Code: C003
• Description: Memory copy PCB 2 problem* 1 • Problems with data from memory copy PCB 2.
• Causes: Defective memory copy PCB 2.
• Remedy: Replace memory copy PCB 2 and check for correct operation.

• Code: C010
• Description: RAM/ROM problem • Read and write data does not match.
• Causes: Defective main PCB.
• Remedy: Replace the main PCB and check for correct operation.

• Code: C011
• Description: Backup memory data problem • Data in the specified area of the backup memory does not match the specified values.
• Causes: Problem with the backup memory data. Defective backup RAM.
• Remedy: Turn safety switch 1 off and back on and run maintenance item U020 to set the contents of the backup memory data again. If the C011 is displayed after re-setting the backup memory contents, replace the backup RAM.

• Code: C021
• Description: Operation unit main PCB communication problem • There is no reply after 20 retries at communication.
• Causes: Poor contact of the connector terminals. Defective main PCB or operation unit main PCB.
• Remedy: Check the connection of connectors CN6 on the main PCB and CN6 on the operation unit main PCB, and the continuity across the connector terminals. Repair or replace if necessary. Replace the main PCB or operation unit main PCB and check for correct operation.

• Code: C022
• Description: Communication problem between the engine PCB and main PCB
  • There is no reply after 20 retries at communication.
• Causes: Defective engine ROM IC. Defective main PCB.
• Remedy: Replace the engine ROM IC on the main PCB and check for correct operation. Replace the main PCB and check for correct operation.

• Code: C023
• Description: Scanner communication problem • There is no reply after 5 retries at communication.
• Causes: Defective main PCB.
• Remedy: Replace the main PCB and check for correct operation.

• Code: C024
• Description: Printer board communication problem*2 •There is no reply after 20 retries at communication.
• Causes: Poor contact of the connector terminals. Defective main PCB or printer board.
• Remedy: Check the connection of connector CN4 on the main PCB and the connector on the printer board. Repair or replace if necessary. Replace the main PCB or printer board and check for correct operation.