Invalid USB option key license. (RC800 Series)

Countermeasure	Error Solution
Enable the option by USB key for option license.	Stop task

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 7719

Brand	EPSON
Updated	2026-10-27

7719

Countermeasure	Error Solution
Enable the option by USB key for option license.	Stop task

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 7719

Brand	EPSON
Updated	2026-10-27