• Code: 001
• Display: Service call 001: Error
• Description: Machine Check Exception hardware fault detection (board failure or poor power supply)
• Remedy: Replace the CU/ PU board.

• Code: 002 ... 007
• Display: Power Off/On 002: Error to 007: Error PC: nnnnnnnn LR: nnnnnnnn FR: nnnnnnnn
• Description: CPU unexpected exception
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 009
• Display: Power Off/On 009: Error PC: nnnnnnnn LR: nnnnnnnn FR: nnnnnnnn
• Description: CPU unexpected exception
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 010
• Display: Power Off/On 010: Error PC: nnnnnnnn LR: nnnnnnnn FR: nnnnnnnn
• Description: CPU unexpected exception
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 011
• Display: Power Off/On 011: Error PC: nnnnnnnn LR: nnnnnnnn FR: nnnnnnnn
• Description: CPU unexpected exception
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 020
• Display: Service call 020: Error
• Description: CU Program ROM Hash Check Error
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 023
• Display: Service call 023: Error
• Description: CU Font ROM Hash error
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.

• Code: 030
• Display: Service call 030: Error
• Description: CU RAM Check Error
• Remedy: Does this error message reappear? Yes Cycle the power. Replace the CU/ PU board.