"Jamie" t wrote in message
...
David Farber wrote:

"David" wrote in message
et...

"David Farber" wrote in message
...
snip

It could also be due to, or exacerbated by, a dried out electrolytic
filter capacitor in the DC supply circuitry.

It occurred to me that if I posted the pictures of these relays, that
it
would be easy for somebody that is more familiar with this type of
equipment
would be able to tell me if these relays have AC or DC type coils:

http://www.pbase.com/mrfixit/image/81163240

http://www.pbase.com/mrfixit/image/81163242

http://www.pbase.com/mrfixit/image/81163244


Thanks for your reply.

--
David Farber
David Farber's Service Center
L.A., CA


These relays are all designed to be energized by an AC source. The
copper
shunt at the end of the pole piece is characteristic of AC relays. Is

there

a 24 volt transformer anywhere in there and do all of the relays
chatter,

or

just one?

David



Yes, there is a 24V transformer. The difficult part is figuring out
which
one(s) are chattering. They are not in a very convenient place to
observe
what's going on and all three of them are mounted side by side. I might
need
to extend the wires a bit so they can be moved into plain view and still
have them electrically connected. Can you please explain in the picture
of
relay 1, http://www.pbase.com/mrfixit/image/81163240, what the rating
of,
"120VAC/28VDC"means? Is that the rating of the contacts?

Thanks for your reply.
If you have a 24 volt supply then may I suggest you look for a rectifier
or diode that has shorted and sending 24 volt ac instead of DC to the
coil.
those relays require DC volts if you're using voltages that low.


--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5


As I found this unit, there is *no* dc power supply in this controller. One
relay coil is connected directly to the 120VAC line voltage and is always on
as long as the main power switch is on. All the other components are powered
by the 24VAC. Those components are the two remaining relays, one self
contained timer control device which delays the gate closing, and the
contactor, which has two 24ACV solenoids that activate switches to enable
the motor in either the forward or reverse direction.

Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA