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Kaeser air compressors are a worldwide operating company, that provides a broad range of air compressor technology to users around the globe. One thing with Kaeser air compressors, like any compressor, they will require troubleshooting in order to diagnose & fix a problem.

This article will provide examples of troubleshooting tips, including the problems, possible causes, and solutions, for a Kaeser air compressor taken from an operator’s manual.

Table of Contents

Kaeser Air Compressor Troubleshooting

I have picked out this manual for a Kaeser air compressor which provides tips on various troubleshooting problems and their possible causes. Though these troubleshooting tips are specifically provided by Kaeser for one of their models of compressors, it is likely that you will be able to transfer this information and apply it to your Kaeser air compressor.

However, I recommend reviewing your specific Kaeser air compressor’s owner’s manual to find the troubleshooting guide provided by them.

We will take a look at the possible causes, and the correct action to take for the following symptoms with tables to follow:

  • Pressure relief valve blowing off
  • Overheating
  • Too high operating pressure
  • Too low operating pressure

Kaeser Air Compressor Pressure Relief Valve Blowing Off

Possible CausesCorrect Actions
Inlet valve not closingCheck the airline and the inlet valve, replace it if necessary
PRV valve leakingReplace PRV
Kaeser Air Compressor Pressure Relief Valve Blowing Off Possible Causes and Correct Actions Table

Kaeser Air Compressor Overheating

Possible CausesCorrect Actions
Oil pipes leakingSeal leaks or change pipes
Defective cooling fanReplace blades or complete fan wheel
Working pressure too highReplace if resetting to permissible value doesn’t work
Defective valveReplace worn parts and reassemble them with new seals
Kaeser Air Compressor Overheating Possible Causes and Correct Actions Table

Kaeser Air Compressor Too High Operating Pressure

Possible CausesCorrect Actions
Inlet valve not closingCheck airline and inlet valve, replace if necessary
The pressure gauge gives a false readingRepair or replace
The unloader valve doesn’t blow offCheck the connections, repair or replace if necessary
Kaeser Air Compressor Too High Operating Pressure Possible Causes and Correct Actions Table

Kaeser Air Compressor Too Low Operating Pressure

Possible CausesCorrect Actions
Pressure relief valve leakingReplace if necessary
The pressure gauge gives a false readingRepair or replace
Inlet valve not opening properlyCheck airline and inlet valve, replace if necessary
Unloader valve doesn’t closeCheck the connections, repair or replace if necessary
Kaeser Air Compressor Too Low Operating Pressure Possible Causes and Correct Actions Table

For further troubleshooting information, visit our Air Compressor Troubleshooting, Solutions, Common Problems & Causes. Other troubleshooting pages that may be of interest to you:

Kaeser troubleshooting related pages:

FAQs (Frequently Asked Questions)

How do I reset my Kaeser air compressor?

To reset your Kaeser air compressor you should either cycle power again or press the button next to the red LED on the controller that has the 2 half moons on it. This should reset the fault and clear the red LED. After this press the green 1 button. If the display goes to ready everything is now reset and ready to go. This may not, however, be the same for every Kaeser compressor model.

Additional Troubleshooting Pages

Kaeser Air Compressor Troubleshooting

Reader Questions and Responses

Kaeser Air Compressor Overheating and Shutting Down

Question

I have a Kaeser air compressor overheating shutting off, is there a specific volume of air that needs to be inlet and exhaust.

It’s installed in a closed room.

Response

There are a number of reasons why an air compressor will overheat.

I suppose it could be the shortage of intake air making the compressor work too hard, or lack of air circulation not allowing natural compressor cooling to take place. Try running the compressor with the compressor room door open to see if it makes any difference.

It is more likely that it is compressor-related, and I would be looking into the air end as a possible heat source.

You don’t provide any details of your air compressor (model / HP) so I cannot even check for technical documents about your problem.

Kaeser DS 141 air compressor
Kaeser DS 141 air compressor

Other visitors will comment on this I hope, but I expect that you probably will need assistance from Kaeser to help you, wherever you are in the world.


Code 5 – Kaeser air compressor shutting down?

Question

My air compressor shows code 5 and shuts down right after start-up. It is telling me there is something wrong with the dryer. I’ve cleaned all the filters.

Response

Brian, I don’t have the compressor or the manual. I would expect that the manual would identify the remedial action for any maintenance code.

Does anyone else know what Code 5 for a Kaeser is and how to correct the compressor fault?

Consider emailing them directly:

[email protected]


Model SM11 Running hot and shutting down.

Question

Oil, oil filter, separator, and filters are all new.

The compressor even runs warm when not loaded. The room temperature is in the low 70’s.

The cooler is completely clean and doesn’t seem to be throwing off much heat. Maybe the temperature sensor
is bad?

Response

If it is actually running hot and shutting down, could be the air end bearings… or maybe a gazillion other things, Fletch.

Or, as you say, it could be the sensor if the compressor itself isn’t actually running hot.

I can’t tell from here??


If you have any Kaeser air compressor troubleshooting questions, please leave a comment below, with a photo if applicable, so that someone can help you!