Chamberlain B2212T Installation Manual - English - Page 48
Routine Maintenance Can Prevent Tragedies
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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: l Starting with the door in the closed position, use the manual disconnect on the opener to disconnect the door. l Look for signs of wear or damage on hinges, rollers, springs, and door panels. l These parts may require periodic lubrication. Check the owner's manual for suggested maintenance. l If any signs of damage are evident, contact a trained door systems technician for assistance. l Verify the photoeye height is no higher than 6" from the garage floor. Test the door for proper operation: l Open and close the door manually using handles or suitable gripping points. l The door should move freely and without difficulty. l The door should balance and stay partially open 3-4 feet above the floor. l If you detect any signs of improper operation, contact a trained door systems technician for assistance. Test the opener safety features: l Reconnect the opener to the door using the manual disconnect and open the door. l 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 2 2x4 and then reverse direction. l Block the photoelectric 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. l If the opener does not perform as described, contact a trained door systems technician for assistance. 1 48