Power On Failure In Initializing - Universal Robots UR3 Service Manual

7. Troubleshooting

7.4.4. Power on failure in Initializing

If power turns off a few seconds after Robot Power is turned On in the Initializing window, there
are many possible causes for this phenomenon.
Most likely it is a control box failure or a communication failure with a joint or the tool.
UR3 204 Service Manual