Safeguard (safety fence) circuit failure detected. Disconnection or other failure was found in one of the redundant inputs. (RC800 Series)

Countermeasure	Error Solution
Check the safeguard (safety door) input signal for a disconnected wire, grounding, or a short circuit, then restart the controller.	Reboot

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 9002

Brand	EPSON
Updated	2026-10-27

9002

Countermeasure	Error Solution
Check the safeguard (safety door) input signal for a disconnected wire, grounding, or a short circuit, then restart the controller.	Reboot

Applicable equipment

Source: Fault JSON · EPSON_RC800_fault_codes_zh_en.json · SHA-256 0be0d785ec2146f8862c8243c81d61bb494845d3df16aeb94473d4601bee25dc · 9002

Brand	EPSON
Updated	2026-10-27