carrier motor master 3 problems

I have a carrier motor master 3

magnetek 3p-vs1 which requires the VS-101 motors which I have.

I have an issue I have seen before and cannot remember the cause.

The thermister is good

At a certain resistance range ,which equals around 80F, the fans do not turn ,they just shake really bad and make a god awful noise . I can short the resistor so they run full speed and the motors appear fine.

I know someone else has encountered this .

Yes ,I know they are junk .....noy going to put mm5 on either . I want to know why...


Thanks

I talked to magnetek...

One or more triacs out of adjustment ....not field adjustable ....device is garbage

Sure why???

Quote:

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Originally Posted by mikeacman

I have a carrier motor master 3

magnetek 3p-vs1 which requires the VS-101 motors which I have.

I have an issue I have seen before and cannot remember the cause.

The thermister is good

At a certain resistance range ,which equals around 80F, the fans do not turn ,they just shake really bad and make a god awful noise . I can short the resistor so they run full speed and the motors appear fine.

I know someone else has encountered this .

Yes ,I know they are junk .....noy going to put mm5 on either . I want to know why...


Thanks

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Quote:

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Originally Posted by Dallas Duster

Sure why???

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I'm not sure what you mean ?

Do you have an answer? Or am I not clear?

I spoke with magnetek and they told me why it was doing this . I also spoke to carrier tech support and they didn't know . I also questioned the application and it was researched by carrier and I was told this is a valid option for the unit in question .

This unit has had 4 of these in two years .

I triple checked the installation and all appears correct . Yes , we are using the vs101 motors

This is on a HJD025 500 series running 208vac.

I can't get a good answer ,good enough for me ,and I'm thinking were going to have to go to something else . I have an email in with a tech support person who has promised to research this for me and let me know .

Magnetek told me it was triac adjustment issues or a triac failure, couldn't tell me why it failed but in the same sentence told me it was junk ..... and to replace it . When I mentioned having 4 in two years they questioned the application.

We are running two motors off this , he wondered if the current was to high .

I checked it with a trms meter and it appeared to be at or near max amps , but not over ....

Yes ,I know they are junk .....noy going to put mm5 on either . I want to know why...

This is what I am referring to.

Well ,I would like to put the 5's on

This is still a warranty issue ...not sure who's going to pay for what.

The customer paid for a replacement in July and we warranty for a year P&L.

I'm going to have to turn it over and let the money men decide this one.

P66 and be done with it.

Junk is the reason.

For 3 phase motors?

Quote:

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Originally Posted by timebuilder

P66 and be done with it.

Junk is the reason.

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I would have thought a MMV was less expensive.

Quote:

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Originally Posted by mikeacman

Well ,I would like to put the 5's on

This is still a warranty issue ...not sure who's going to pay for what.

The customer paid for a replacement in July and we warranty for a year P&L.

I'm going to have to turn it over and let the money men decide this one.

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Quote:

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Originally Posted by timebuilder

P66 and be done with it.

Junk is the reason.

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the biggest problem with p66 is they leak after a while.

Quote:

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Originally Posted by Dallas Duster

For 3 phase motors?

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try the Hoffman 865-3aa.

Quote:

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Originally Posted by Dallas Duster

For 3 phase motors?

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I missed that part. I was using my dumb phone.