LiftMaster 3950 3950 Manual - Page 16

WARNING OPERATION IMPORTANT SAFETY INSTRUCTIONS WARNING To reduce the risk of SEVERE INJURY or DEATH: 1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS. 2. ALWAYS keep remote controls out of reach of children. NEVER permit children to operate or play with door control push buttons or remote controls. 3. ONLY activate door when it can be seen clearly, it is properly adjusted and there are no obstructions to door travel. 4. ALWAYS keep door in sight until completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR. 5. NO ONE SHOULD GO UNDER A STOPPED, PARTIALLY OPENED DOOR. 6. If possible, use emergency release handle to disengage door ONLY when door is CLOSED. Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly, causing SEVERE INJURY or DEATH. 7. NEVER use emergency release handle unless doorway is clear of persons and obstructions. 8. After ANY adjustments are made, the safety reversal system MUST be tested. 9. Safety reversal system MUST be tested every month. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor. Failure to adjust the garage door opener properly may cause SEVERE INJURY or DEATH. 10. ALWAYS KEEP DOOR PROPERLY BALANCED (see page 3). An improperly balanced door may not reverse when required and could result in SEVERE INJURY or DEATH. 11. ALL repairs to cables, spring assemblies and other hardware, ALL of which are under EXTREME tension, MUST be made by a trained door systems technician. 12. ALWAYS disconnect electric power to garage door opener BEFORE making ANY repairs or removing covers. 13. SAVE THESE INSTRUCTIONS. Using Your Operator Press and hold the push button on the single button control station until the door starts to move. When the operator is activated (with the safety reversing sensor correctly installed and aligned) 1. If open, the door will close. If closed, it will open. 2. If closing, the door will reverse. 3. If opening, the door will stop. 4. If the door has been stopped in a partially open position, it will close. 5. If an obstruction interrupts the sensor beam while closing the operator will reverse. 6. The sensor has no effect in the opening cycle. 7. If fully open, the door will not close when the beam is broken. Care of Your Operator MAINTENANCE SCHEDULE Once a Month • Manually operate door. If it is unbalanced or binding, call a trained door systems technician. • Check to be sure door opens & closes fully. Adjust limits and/or force if necessary (see Adjustment Steps 1 and 2). • The operator does not require additional lubrication. Do not grease the door tracks. 16