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Old 21-05-2018, 08:03   #1
SFH
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New ONAN genset 7.5kW MKDBJ: Error code 27: AC Voltage Sense Lost

Hi,

We have installed a new ONAN genset 7.5kW MKDBJ. When trying to start it it keeps sending error 27: AC Voltage Sense Lost

Basically it runs for 2-3 seconds. When the Kubota engine stabilizes in speed the genset shots down with this error code. The manual says: Contact Cummins - but I would still like to understand the root cause

Have any of you experienced this problem?
What is the solution?

//Steen
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Old 12-12-2018, 00:08   #2
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Re: New ONAN genset 7.5kW MKDBJ: Error code 27: AC Voltage Sense Lost

Sounds like either the gen isnt producing power or it isn't able to sense the frequency of the voltage .
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Old 12-12-2018, 00:26   #3
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Re: New ONAN genset 7.5kW MKDBJ: Error code 27: AC Voltage Sense Lost

Thanks.

This was solved by Onan in less than 30min by replacing the sending component. All done under warranty

Runs perfect now

/Steen
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