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RPM Reversal Diagnostic Error on Liftmaster LYN40024
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Does the setup allow you to set the limits by holding the direction buttons or does it move a few inches then stop during the limit setup ? If it does then RPM sensor is gone in the motor most likely due to wires being shorted. If Not then most likely brackets are incorrect and arm has strained the gears inside causing it to fight against itself.
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RE: RPM Reversal Diagnostic Error on Liftmaster LYN40024 - by Mark - 16-05-2011, 03:53 PM

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