AC890PX CS module not in Run

I have an AC890PX Drive. The CS Module, after power up won't supply any DC power. The Run LED is turned off and the fans do not run. What can cause this problem? All other modules in the rack are healthy and awaiting DC Power.

The manual is extremely vague on this issue and basically says "CS module cannot supply DC Power" and that is it. It gives no clues as to what can cause this issue.

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0 Daniel Cliffe, Employee over 1 year ago

Good morning JC. It is possible that your CS module has failed. I recommend checking the bus voltage parameter on this unit when the high voltage is on. To do this, go online with DSE Lite and look at Motor Control > Feedbacks > DC Link Volts. Or, from the keypad, check Setup > Motor Control > Feedbacks > DC Link Volts. If DC Link Volts reads 0 (or something very low) even with the high voltage on, you probably have a damaged CS module. Consider swapping it with a spare.

It is also important to make sure that high voltage is getting to the CS module's inputs. Many AC890PX drives were sold with accessory cabinets for external contactors (among other things). If there is a contactor installed in your unit that is not pulling in, you might not be getting high voltage.
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0 Daniel Cliffe, Employee over 1 year ago in reply to Daniel Cliffe

Based on the troubleshooting you have done, I think it is likely you have a bad CS module. I would recommend installing a spare.
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0 JC Chamberlin over 1 year ago in reply to Daniel Cliffe

Believe me, if we had spares, that would have been the first thing we did. There are not parts available anywhere in the country and my customer has been down for two weeks.
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0 Daniel Cliffe, Employee over 1 year ago in reply to Daniel Cliffe

I wish I had a faster solution. Unfortunately, our lead times have been pushed very far out due to component shortages from our vendors.
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0 JC Chamberlin over 1 year ago in reply to Daniel Cliffe

What are the scenarios that would keep the run light on the CS module from coming on?

Can you answer this question, because we found a spare unit that is a smaller size and we are having the same problem.
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0 JC Chamberlin over 1 year ago in reply to Daniel Cliffe

What are the scenarios that would keep the run light on the CS module from coming on?

Can you answer this question, because we found a spare unit that is a smaller size and we are having the same problem.
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AC890PX CS module not in Run

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