Hi5 controllermaintenanceHi5 Controller Maintenance Manual6. Troubleshooting6.1. Troubleshooting Solution6.1.3. E0011 AMP overvoltage (P-N)6.1.3.1. OutlineOn this page6.1.3.1. Outline6.1.3.1. Outline Direct current voltage (P-N) of Servo Drive Unit that drives the motor exceeded the set value.