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LiftMaster ATSW Manual Del Usuario página 38

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Routine Maintenance Can Prevent Tragedies
Make monthly inspection and testing of your garage door and opener system a part of your regular routine. Review your owner's manual for both the door and door opener. If you don't have the owner's manuals, contact the manufacturer(s)
and request a copy for your specific model(s). Look for the opener model number on the back of the power unit.
WARNING – Springs are under high tension. Only qualified individuals should adjust them.
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Visually check the door and installation:
Starting with the door in the closed position, use the manual disconnect on the opener to disconnect the door.
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Look for signs of wear or damage on hinges, rollers, springs, and door panels.
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These parts may require periodic lubrication. Check the owner's manual for suggested maintenance.
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If any signs of damage are evident, contact a trained door systems technician for assistance.
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Verify the photoeye height is no higher than 6" from the garage floor.
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Test the door for proper operation:
Open and close the door manually using handles or suitable gripping points.
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The door should move freely and without difficulty.
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The door should balance and stay partially open 3–4 feet above the floor.
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If you detect any signs of improper operation, contact a trained door systems technician for assistance.
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Test the opener safety features:
Reconnect the opener to the door using the manual disconnect and open the door.
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Place a 2x4 board flat in the path of the door (1) and try to close it (2). The door should stop when it comes in contact with the 2x4
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and then reverse direction.
Block the photoelectric sensor by waving an object in front of the sensor and attempt to close the door. The door should not close
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unless the wall-mounted push button is manually held during operation.
If the opener does not perform as described, contact a trained door systems technician for assistance.
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