Clearing Kollmorgen AKD Fault Messages – Part 1

Dealing with Kollmorgen AKD servo drives can be hard, especially when fault messages keep stopping production. It's very important to know these common issues and how to fix them; this way, you can keep things running well. We, at Wake Industrial, not only have many Kollmorgen products, but also good repair help to solve any problem you might face. Our team is focused on ensuring your work runs without a stop and decreasing wasted time while increasing the work output.

In this article, we will look at common AKD fault messages, what they mean, and outline effective ways to fix them.

Common AKD Fault Messages (With Solutions!)

Here are a few common Kollmorgen AKD errors and how to solve them:

1. Motor Parameter Read Fault (F534)

This error occurs when the AKD drive cannot read the motor parameters from the feedback device. This may happen because of lacking available feedback memory or because of a misprogrammed device.

Solution: Have the ADK reread the parameters via the "Disable and Clear Faults" button or try using the “DRV.CLRFAULTS” command. If this step fails, set “MOTOR.AUTOSET” to 0 and reset the AKD settings via reinstallation. For motors with memory (like Biss Analog, Endat, SFD), you may need to send the motor back for proper memory programming by the manufacturer, because that's where the issue is!

2. Power-Board Over-Temperature Fault (F535)

This error happens when the power-board temperature sensor says temperatures are more than 85°C, which causes the drive to shut down due to high temperature.

Solution: you should reduce the drive's load or improve the cooling methods to maintain temperature. You should also regularly check ventilation systems because good airflow helps.

3. Standby Power Supply Fault (F536)

This error means the standby voltage circuit is overloaded, often because there is too much 24V of power load in AKD-N strings, which makes the voltage too high.

Solution: Check the total 24V power load of AKD-N in the strings. This includes both the drive and motor brake supply. To fix this, you must power cycle the AKD-C because the errors are due to the main power supply.

4. Precharge Fault (F537)

This error happens when the precharge process isn't completed in a reasonable time frame. It may be due to the short circuit in the power supply.

Solution: Check for short circuits in the string cables and replace the faulty parts, as they are the reasons for the issue.

5. AC Input Phase Missing (F541, F542, F543)

These errors indicate that there is a missing phase in the main supply; they are L1, L2, or L3 and this issue causes the motors to not start.

Solution: Make sure the power connectors and the power source are supplying power to all phases, as all phases are important for motors to run.

6. String Current Over Peak/Continuous Limit (F545, F546)

These errors occur when the current in the string exceeds the AKD-C's rated highest amount or rated continuous current limits because the current drawn by the motor is too high.

Solution: Lower the AKD-N current limits to prevent the drive from drawing too much current from the AKD-C because the continuous flow should be within the rated range.

7. Safe Torque Off (STO) Fault (F602)

The STO fault is a safety feature that stops the system from restarting just by disabling the drive's power stage. It is controlled via the X1 connector and it requires 24V to function. Otherwise, the drive will not be enabled, and this will cause an error.

Solution: Make sure that 24V is given to the STO digital input. If the STO input does not have the required voltage, it will cause an F602 error because the safety feature will not allow the drive to operate! So, proper wiring of the STO input is a must.

Get Professional Help with Wake Industrial

If AKD servo drive problems are too much or it takes too long to fix, then getting help from an expert can save a lot of time and effort. At Wake Industrial, we specialize in diagnosing and repairing AKD drives, ensuring your equipment operates at peak performance. Our team has the skills to fix any error—from difficult hardware problems to updating the firmware. Don't let continuous faults slow operation; you can trust Wake Industrial for good, quick, and cheap solutions. Contact us today to know how we can help—keep your systems running smoothly and don't waste money on haulted production! Didn't find what you were looking for here? Check out our second page for additional errors. 
 

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