The following could cause the QEL device to retract and release repeatedly:
If this is a vertical rod type device, the vertical rods could be adjusted too short.
Check rods for dead locking, if no dead locking adjust the rods.
If there is no communication between the power supply and the QEL device.
First make sure a PS900 series power supply with 900-2Q option board is being used.
If using the correct power supply and option board, then activate the control input (card reader, key pad, etc.) then hold the calibration button on the QEL motor while activating the retraction for the device then release the button.
Wrong gauge wire could also cause the QEL device to pull and release repeatedly.
Required #18 gauge up to 200 feet maximum run wire.
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