What causes KUKA Robot alarm KRC0135?

Program contains a tight loop with continuous rapid acceleration and deceleration cycles without dwell time. Power module fan is obstructed or not functioning properly, reducing cooling capacity. Ambient temperature in the control cabinet exceeds acceptable operating range for the power module. Heavy dynamic load on the robot arm combined with aggressive motion profiles generates excessive resistor heating. Feedback resistor is aged or degraded and has reduced thermal dissipation capability.

How do I fix KUKA Robot alarm KRC0135?

1. Inspect the power module fan for dust accumulation or mechanical obstruction and clean the ventilation paths 2. Measure ambient temperature inside the control cabinet and verify it is within the specified range for power module operation 3. Review the motion program and insert deliberate dwell time or reduced acceleration rates between cyclic movements 4. Reduce the acceleration and deceleration ramp rates in the motion instruction parameters to decrease current demand on the resistor 5. Allow the power module to cool for at least 30 minutes with the controller powered on but no motion active 6. If alarm persists after these measures, schedule replacement of the feedback resistor or power module with KUKA service personnel

KUKA Robot codes

axismd.ai

KUKA Robot Controller

Overheat/Thermal · Intermediate

Alarm KRC0135

KUKA Robot KRC0135 - OVERTEMPERATURE FEEDBACK RESISTOR <power module no.> OR FAN

The feedback resistor (ballast resistor) in the specified power module has reached excessive temperature due to continuous duty cycle without adequate cooling time. This typically occurs when the robot executes repetitive acceleration and deceleration movements at high frequency without rest periods.

KUKA RobotOverheat/ThermalIntermediate

KRC0135

KUKA Robot KRC0135 - OVERTEMPERATURE FEEDBACK RESISTOR <power module no.> OR FAN

OVERTEMPERATURE FEEDBACK RESISTOR <power module no.> OR FAN

Common Causes

Program contains a tight loop with continuous rapid acceleration and deceleration cycles without dwell time
Power module fan is obstructed or not functioning properly, reducing cooling capacity
Ambient temperature in the control cabinet exceeds acceptable operating range for the power module
Heavy dynamic load on the robot arm combined with aggressive motion profiles generates excessive resistor heating
Feedback resistor is aged or degraded and has reduced thermal dissipation capability

Troubleshooting Steps

1Inspect the power module fan for dust accumulation or mechanical obstruction and clean the ventilation paths
2Measure ambient temperature inside the control cabinet and verify it is within the specified range for power module operation
3Review the motion program and insert deliberate dwell time or reduced acceleration rates between cyclic movements
4Reduce the acceleration and deceleration ramp rates in the motion instruction parameters to decrease current demand on the resistor
5Allow the power module to cool for at least 30 minutes with the controller powered on but no motion active
6If alarm persists after these measures, schedule replacement of the feedback resistor or power module with KUKA service personnel

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.