Error code: 00020003

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BOOT program SUM error.

Explanation:
There may be a case where the boot program of firmware is broken. In such a case, this message is displayed and the printer stops operating. Only at power on.

Cause of trouble:
SUM check error for BOOT program area.

Remedy:
1. Firmware Reinstallation.
2. Replace the MAIN Board (C472 MAIN).