dynasty 200 help code

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have a new to me dynasty 200dx s/n mc110267l. when i plugged in the foot control (rfcs-14hd) screen shows help-10, and manual states that means "torch trigger depressed". i would appreciate a little advice on where to start looking for problem. the foot control appears to work properly on 3 cst280's that we have in the shop that we use for lift-arc tig presently. i am assuming that "torch trigger depressed" means that a contactor circuit is closed? would that indicate a problem in the machine or the foot pedal? thanks for any help, tom.
Reply:Originally Posted by dbl612have a new to me dynasty 200dx s/n mc110267l. when i plugged in the foot control (rfcs-14hd) screen shows help-10, and manual states that means "torch trigger depressed". i would appreciate a little advice on where to start looking for problem. the foot control appears to work properly on 3 cst280's that we have in the shop that we use for lift-arc tig presently. i am assuming that "torch trigger depressed" means that a contactor circuit is closed? would that indicate a problem in the machine or the foot pedal? thanks for any help, tom.
Reply:thank you,shovelon. i was just wondering if i would be able to check foot pedal pins with on ohmmeter for proper values?
Reply:Originally Posted by dbl612thank you,shovelon. i was just wondering if i would be able to check foot pedal pins with on ohmmeter for proper values?
Reply:Very easy to do.  There is a simple on off switch in the circuit (two wires) and a voltage divider (which is a variable resistor with the center tap changing values as the pedal is pushed.) A variable voltage divider is called a potentiometer.  The voltage divider uses three wires.  Hook up your volt ohm meter to the center tap, verify resistance changes as the pedal is pushed.   Where did your pedal come from?  How old is it?  Looking at the diagram, if one of those capacitors shorted out that would screw you up big time.  You will need a volt ohm meter and set it to resistance scale.  Make sure the pin numbers match up in their correct locations within the connectors.  If a pin was located wrong you would certainly get errors.the hardest thing to do is find a wiring diagram for the foot pedal with all the correct pin callouts.  I think this one will work?If you want to understand how the voltage divider / potentiometer works, check out http://en.wikipedia.org/wiki/PotentiometerGood luck with it..  zip.Last edited by zipzit; 09-14-2012 at 05:54 AM.