What would cause a Senior Swing to open only 10 degrees and then close?

Issue/Symptom – upon receiving an activation input the Sr Swing gearbox opens only about 10 degrees and then returns to the close position.  Unit will never learn opening nor function properly.  First make sure arm was installed and set up properly.  See related solutions for proper arm installations.  After verification of proper arm set up the unit still does the same thing , this can indicate the encoder plug is not seated in its connector.  

Troubleshooting step:  With power off to the unit, One thing to check here is the four wire plug under the encoder cap, which is located on the end of the motor.   Need to make sure that the plug  is fully engaged/plugged into the encoder.   See here for steps to check this plug.  Ensure plug is fully engaged into encoder and all wires are secured in the plug.   If any of the wires are not secure in the plug, a complete motor gearbox (series #-3454 and Handing) will be needed.  You will also want to have customer verify that all the wires in the six pin plugs from Motor Gear Box to Control Box are secured in plug.  After verifying all this the door is still doing the same thing then it would be the control box that is not reading the encoder correctly and the Control Box (series #-3462) would need to be replaced.
 
 

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