Routine Maintenance Can Prevent Tragedies - LiftMaster LM3800W Manual Del Usuario

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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.
Visually check the door and installation:
Test the door for proper operation:
Test the opener safety features:
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Starting with the door in the closed position, use the manual
disconnect on the opener to disconnect the door.
Look for signs of wear or damage on hinges, rollers, springs, and
door panels.
These parts may require periodic lubrication. Check the owner's
manual for suggested maintenance.
If any signs of damage are evident, contact a trained door
systems technician for assistance.
Verify the photoeye height is no higher than 6" from the garage
floor.
Open and close the door manually using handles or suitable
gripping points.
The door should move freely and without difficulty.
The door should balance and stay partially open 3–4 feet above
the floor.
If you detect any signs of improper operation, contact a trained
door systems technician for assistance.
Reconnect the opener to the door using the manual disconnect
and open the door.
Place a 40 mm high 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 board and then reverse direction.
Block the photocell sensor by waving an object in front of the
sensor and attempt to close the door. The door should not close
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.