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1. 12:53 PM - DMP-200 Relay Needed for Yak 52 (ScottB)
2. 01:22 PM - Re: DMP-200 Relay Needed for Yak 52 (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
Message 1
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| Subject: | DMP-200 Relay Needed for Yak 52 |
Our good ol' generator went off line and our troubleshooting finally led us to
the DMP-200 latching relay. I dug the glue out of the screw holes and when we
got the cover off it was totally burned inside and two melted balls of copper
fell out onto the floorboard. Suffice it to say we found the smoking gun.
With all the Yak's that have gotten the alternator conversion I figure there's
got to be a bunch of these relays out there collecting dust on the shelf (or perhaps
riding along as dead weight and still installed on the firewall?).
Please advise if you have one available and how much you'd like for it. We sure
would appreciate it.
Thanks,
Scott
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=382087#382087
Message 2
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| Subject: | DMP-200 Relay Needed for Yak 52 |
Scott, I hope you find one. They are somewhat rare for some reason.
There are actually a number of relays inside that device, which is kind
of why it is called "The Combined Device". It has two standard 28 volt
relays that are easy to replace, one main current contactor (the big one
with the cover on top), and one reverse current relay.
It actually CAN be repaired if you know a little bit about electronics.
The only relay that would be a real hassle would be the reverse current
relay itself. That does not usually fail. So when you are talking
about "totally burned out" you might not be as bad off as you thought.
Take a hard look at what "melted", and take a picture and post it if you
can.
If you can find a used one that someone is willing to part with ...
GREAT! I suggest you get TWO! :-)
If you can't, let me know and I can possibly show you how to put in
milspec 28 vdc relays to replace the ones that burned out. My GUESS is
that the main contactor relay froze in place, allowing total reverse
current to occur, which then melted the thing. That would be about the
only thing that would actually cause it to MELT like you are talking
about. I am surprised that your main battery fuse did not blow when
this happened. There is also a possibility of damage to the main power
contactor relay external to this device as well... this is the one that
is turned on when you switch the MASTER on.
In any case, with that relay REMOVED (be careful of nothing touching
ground!) you should be able to turn on your electrical master and have
normal battery power. If that does not happen, you have other damage as
well... but since you just said the "generator went off-line", you might
have gotten very lucky.
I highly recommend the B&C SK-35 for replacement, and install is dead
easy. If it comes to that.
Best of luck,
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of ScottB
Sent: Wednesday, August 29, 2012 3:51 PM
Subject: Yak-List: DMP-200 Relay Needed for Yak 52
Our good ol' generator went off line and our troubleshooting finally led
us to the DMP-200 latching relay. I dug the glue out of the screw holes
and when we got the cover off it was totally burned inside and two
melted balls of copper fell out onto the floorboard. Suffice it to say
we found the smoking gun.
With all the Yak's that have gotten the alternator conversion I figure
there's got to be a bunch of these relays out there collecting dust on
the shelf (or perhaps riding along as dead weight and still installed on
the firewall?).
Please advise if you have one available and how much you'd like for it.
We sure would appreciate it.
Thanks,
Scott
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=382087#382087
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