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Old 03-12-2017, 06:31   #1
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Onan MDKUB 5.5 kVA genset

Dear all,

I am in South Afrika, Saldanha. The Onan MDKUB doesnot generate AC current. After check with 'specialist' the VR might be faulty. The original VR (part no 305-0854-04) is not available. They tried to change the original one with another AVR. No result. It seems that they are confused with the wiring. Is there anyone with a wiring diagram or any other advice?
Gr Peter
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Old 04-12-2017, 04:38   #2
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Re: Onan MDKUB 5.5 kVA genset

Greetings and welcome aboard the CF, Peter.
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Old 04-12-2017, 21:04   #3
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Re: Onan MDKUB 5.5 kVA genset

Thank you and have a bvery nice day
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Old 05-12-2017, 17:09   #4
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Re: Onan MDKUB 5.5 kVA genset

Can we assume that you have eliminated the brushes and/or collector rings as a possible problem. That was my problem on an MDKAU once.
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Old 07-12-2017, 08:24   #5
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Re: Onan MDKUB 5.5 kVA genset

Hello Captain Bill, That is correct. Field, brushes are ok. That is why we tried a generic VR however it might be that there is a relais (or something else) that simply prevent generating current if the working temp has not been reached. Is that possible? Kind reg Peter
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