Home Forums General Discussion Technical Questions Dover oildraulic solid state control

1970s 4 stop, will not run down on auto will run up fine and will run up and down on inspect. I have tried new cards out of a running unit with same problem. Does anyone have a print of the logic circuits are any idea what to check.

If I remember correctly you can run those on inspect all the way down to the springs. Check the bottom limits. They stop from running down on auto.

Print numbers are posted in the controller. I may have what you need. Pm me that and an email address.

Check 1a and ta

Page 1. 122864
Page 2. 122867
Page 6. 119005
Page 7 119322
Vmp. 119882

Jkh I sent you a pm but later said it failed so here it is.

[email protected]

1a and ta are ok signal is getting to the card for a down call but dosnt pick checked everthing today we could think of and still nothing. Did they make a print that showed the logic side

Do u have at least 24v funny things can happen if too low

Think it was putting out 31 volts but 1a and ta were 15.1 vdc