USB connection of this system is reserved for the RC620 Controller and cannot be used for RC+8.0. (RC800 Series)

Countermeasure	Error Solution
Install RC+8.0 on another computer, then use it.	-

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 10504

Brand	EPSON
Updated	2026-10-27

10504

Countermeasure	Error Solution
Install RC+8.0 on another computer, then use it.	-

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 10504

Brand	EPSON
Updated	2026-10-27