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avatar: FixerOfThings
FixerOfThings
22 posts
Replied to FixerOfThings post on January 8th, 2019

Hello,

I have a J-20 XPI Centrifuge w/JLA-9.1000 rotor that I am trying to repair. When running the unit initially, it would spin up and then give the D11 Error then shutdown the drive and slow down without the brake.

I ran the windage calibration, it completed with no problems, but it still gives the D11 error when I try to run it. It doesn't appear to have any other issues.

avatar: FixerOfThings
FixerOfThings
22 posts
Replied to FixerOfThings post on January 29th, 2019

I'm going to have to change my user name to CantFixThings 

avatar: dpkleessr
dpkleessr
1081 posts
Replied to FixerOfThings post on February 6th, 2019

The D11 diagnostic refers to the brake resistor overheating.  There is a fan that cools off the resistor under normal circumstances.  Your situation is NOT normal as the brake resistors should not be having any drive current flowing through them during acceleration.  In the 17 years that I worked on Avanti J's, I never encountered that particular error so I am really not sure how to proceed.  Does the drive appear to be accelerate normally and at least get up to speed?  What happens after the diagnostic is exactly what the centrifuge is supposed to do because if there is a failure of the cooling fan, you don't want all of the drive current running through the brake resistors with no cooling.

Don

avatar: FixerOfThings
FixerOfThings
22 posts
Replied to dpkleessr's post on February 7th, 2019

Don, Thank you for responding to my question. It has been a while since I was on this particular machine, if I remember correctly it only got up to about 2500-3000 rpm before giving the error. I put it aside since I couldn't resolve the error.

Thanks

Replied to FixerOfThings post on February 7th, 2019

I have a J-20 XPI Centrifuge w/JLA-9.1000 rotor that I am trying to repair. When running the unit initially, it would spin up and then give the D11 Error then shutdown the drive and slow down without the brake.

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https://mandspeoplesystems.xyz/

avatar: FixerOfThings
FixerOfThings
22 posts
Replied to FixerOfThings post on March 19th, 2019

I think I might have figured this out. I have a J-26XPI that is also giving the D11 error. So after wrestling with this for a day, I decided to try plugging it into the 208V instead of 240V. After plugging it into 208V it worked fine, no overheating. I was looking over the wiring schematics and found that my J-26 XPI was wired for 208V. This caused the resistors to overheat giving the D11 error. I'm going to check my J-20 later today and I bet that one is also wired for 208V

There was no way to know what it was wired for without the schematics. The label on the machine does not state what voltage it is set for, just what it can be used with.

avatar: dpkleessr
dpkleessr
1081 posts
Replied to FixerOfThings post on March 19th, 2019

Now that I would not have guessed would have been the problem. Was the centrifuge moved from its original place of installation that was 208 to a socket that is wired for 240?

So here's the wiring information for the transformer tapping. The ORANGE wire goes to the transformer terminal closest to 230 VAC with the compressor on and the drive accelerating for > 30 seconds so set your run parameters accordingly to give everything enough time to meet the criteria. Same thing for the PURPLE wire. Also, for a 208 volt installation the BLACK wire should be on terminal 3. Chances are that if the centrifuge is now running properly that most of the wiring is already correct. If you want to set it up for 240VAC wiring let me know and I'll give you that information too.

Don

avatar: FixerOfThings
FixerOfThings
22 posts
Replied to dpkleessr's post on March 19th, 2019

My company bought it used. We purchased the service manual recently and I was able to figure out that it was wired for 208V from that. Thanks for your help Don.

avatar: dpkleessr
dpkleessr
1081 posts
Replied to FixerOfThings post on March 19th, 2019
Not sure what the copyright date on the manual you have is but the one thing it would NOT have are the service memos and updates of which there were well over 100 so trusting that manual explicitly could be a problem because there were even wiring changes for the transformer tapping not to mention part numbers being changed as the hardware and firmware were updated. Pleased that you got it fixed. Don