• Code: A0-01
• Description: PCU PWB ROM error
• Causes: The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. PCU PWB trouble.
• Remedy: Use SIM49-1 to perform the firmware version-up procedure again. Replace the PCU PWB.

• Code: A0-02
• Description: SCU PWB ROM error
• Causes: The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. SCU PWB trouble.
• Remedy: Use SIM49-1 to perform the firmware version-up procedure again. Replace the SCU PWB.

• Code: A0-04
• Description: Scanner expansion PWB (ACU) (ACRE) ROM error
• Causes: Scanner expansion PWB (ACU) (ACRE) ROM data error. An error occurs during firmware upgrading for some reasons.
• Remedy: Perform firmware upgrading again.

• Code: A0-05
• Description: Scanner expansion PWB (ACU) (ACRE) firmware error
• Causes: Improper firmware A firmware of a different model is installed. A ROM of a different model is installed.
• Remedy: Replace the ROM with a proper one. Write the proper firmware. (Upgrade to the proper firmware.)

• Code: A0-10
• Description: MFPC PWB ROM error
• Causes: CTL and the image ROM firmware combination error
• Remedy: Check the firmware combination of CTL and the image ROM.

• Code: A0-11
• Description: Firmware version inconsistency (MFP - PCU)
• Causes: Firmware combination error between the MFP and the PCU.
• Remedy: Install the firmware in the all-firmware version-up mode.

• Code: A0-14
• Description: Inconsistency between the MFP and the CPU firmware version
• Causes: Combination error between the MFP and the CPU UI firmware version.
• Remedy: Install the firmware in the all-firmware version-up mode.

• Code: A0-15
• Description: Incompatible DSK BOOT and program firmware
• Causes: Installation of the normal firmware was performed with a security kit enable.
• Remedy: Stop installation of the normal firmware.