[Elecraft] KPA500 #431 & no fan running

[Ron D'Eau Claire]

Silly question perhaps, but did you make sure the fan cable is plugged in?
See the figure "Connecting the Fan Cable to the Power Supply Module." - fig
37 on page 27 in the Rev D manual.

An ohmmeter at the fan connector will tell you if there is continuity
through the fans.

If the fan runs when you shut the KPA500 off at the front panel, then you
know the wiring is good. In that case the first thing I'd do is reload the
firmware in case there is glitch in the current load. 

73, 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Oliver Dröse
Sent: Monday, October 03, 2011 1:13 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA500 #431 & no fan running

Hi guys,

just to report that I finished building my KPA500 this afternoon. Everything

seems to be well except that the fan is not working, neither in NOR menu 
setting nor if I set the speed manually to any value between 1 and 6.

Anyone any idea on that? Double-checked all the cabling again, all ribbon 
cables are tight and correctly mounted (checked that first as I remembered 
someboy with the same problem and that being the cause).

Thanks in advance! Vy 73, Olli - DH8BQA


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