What causes KUKA Robot alarm KRC0439?

Teach pendant is powered on and actively connected to the KRC controller. Mobile teach box (KMR) is in use and transmitting control signals. Operator control device has been left powered on after completion of programming or maintenance tasks. Communication link between operator control device and controller is established and functional. System is in teach mode or setup mode requiring operator interaction.

How do I fix KUKA Robot alarm KRC0439?

1. Verify that the operator control device is intentionally in use and being held by an authorized technician 2. Check the teach pendant or mobile teach box display for active status indicators and confirm communication with the KRC controller 3. Review the current robot operating mode (Manual, Automatic, Setup) to ensure the active control device is appropriate for the current task 4. If the alarm is unexpected, power off the teach pendant or mobile teach box using its power button or disconnect its wireless connection 5. Confirm that the robot is not operating autonomously while an operator control device is active to prevent unintended movements 6. If the alarm persists after disconnecting all operator control devices, check the communication cables and wireless modules for proper connection and functionality

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0439

KUKA Robot KRC0439 - <operator control device> IS ACTIVE

This alarm indicates that an operator control device (such as a teach pendant or mobile teach box) is currently active and connected to the KRC controller. The robot system has detected an active input from an operator control unit, which typically means the device is powered on and communicating with the controller. This alarm is informational and reflects the current operational state rather than a fault condition.

KUKA RobotSystemBasic

KRC0439

KUKA Robot KRC0439 - <operator control device> IS ACTIVE

<operator control device> IS ACTIVE

Common Causes

Teach pendant is powered on and actively connected to the KRC controller
Mobile teach box (KMR) is in use and transmitting control signals
Operator control device has been left powered on after completion of programming or maintenance tasks
Communication link between operator control device and controller is established and functional
System is in teach mode or setup mode requiring operator interaction

Troubleshooting Steps

1Verify that the operator control device is intentionally in use and being held by an authorized technician
2Check the teach pendant or mobile teach box display for active status indicators and confirm communication with the KRC controller
3Review the current robot operating mode (Manual, Automatic, Setup) to ensure the active control device is appropriate for the current task
4If the alarm is unexpected, power off the teach pendant or mobile teach box using its power button or disconnect its wireless connection
5Confirm that the robot is not operating autonomously while an operator control device is active to prevent unintended movements
6If the alarm persists after disconnecting all operator control devices, check the communication cables and wireless modules for proper connection and functionality

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