Universal Robots CB3 Error Code C71A12: Phase 3 or multiple phases is unconnected or not working

Universal Robots Robot Minor System

Model: CB3 (UR3/UR5/UR10) | Code: C71A12

Applicable Systems
UR3 UR5 UR10 UR3e UR5e UR10e UR16e UR20 UR30

Symptoms

The wire is (1) damaged or (2) has been disconnected from the PCB (not likely) or (3) defect PCB

Possible Causes

  • The wire is (1) damaged or (2) has been disconnected from the PCB (not likely) or (3) defect PCB

Troubleshooting Steps

  1. Step 1: Check joint for damaged or loose connections,
    Check if the issue is resolved after this step
  2. Step 2: Replace the joint
    Check if the issue is resolved after this step

How to Reset

Power cycle the robot controller and perform a complete reboot sequence. If the error persists, update the software to the latest version.

Source: Universal Robots Official Error Codes Directory (https://www.universal-robots.com/manuals/EN/PDF/Shared/ErrorCodes/ErrorCodes.pdf)

Category: Robot