If you hear a click after 5 seconds then the problem is NOT the limit switch,
it comes before the relays.Although it could be several things, the first thing
I would do is to swap the time delay relays and see if the problem follows them
(i.e. problem moves to down direction).I don't recall if the other relays are
wired or plugins, but if easy, try swapping them next.Lastly, there is probably
a capacitor inside of the motor. They go bad over time. Since more torque is
required to raise then to lower, it might show up first when you try to raise.
-Mike-WA6ZTY
From: Kenneth Sobel <kenxxx@optonline.net>
To: towertalk@contesting.com
Sent: Sunday, January 31, 2016 6:05 AM
Subject: [TowerTalk] HDX-572MDPL up direction fault
I have an intermittent problem with my US Tower HDX-572MDPL
It is 17 years old.
Sometimes when I push the switch on the tower box to up position, after the 5
sec delay I hear a click from inside the electrical box and the motor will not
start.
Other times it works normally.
Problem is only in up direction.
I also have the remote control box inside shack, but never use it.
I am thinking up limit switch or up relay inside tower electrical box.
I know the limit switch is 802T-AP but does anyone know the part number for the
lever?
It was rusting and 3 years ago the switch and lever were sprayed with
galvanizing spray.
So I’m thinking to replace the lever when replacing the limit switch.
Do the relays need to be replaced after 17 years or just cleaned?
Does anyone know the part numbers for the relays?
W2GD will be here in spring or summer to work on the tower, but I want to have
all replacement parts ready.
de Ken W3JJ
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