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1, 换个功率大点的。
2, 增加 the travel limits，参考如下：
How do I adjust the travel and force limits?
Published 11/11/2009 09:23 AM | Updated 02/17/2015 12:42 PM
How do I adjust the travel and force limits?
Limit adjustment settings regulate the points at which the door will stop when moving up or down. After adjusting the limit settings, check the Safety Reversal System and Test the Protector System. Note: Manual travel and force adjustments are adjusted using a flathead screw driver.
To operate the opener, press the door control push bar. Run the opener through a complete travel cycle.
- Does the door open or close completely?
- Does the door stay closed and not reverse unintentionally when fully closed?
Adjustment procedures are outlined below. Run the opener through a complete travel cycle after each adjustment.
Step 1: Adjust the UP and DOWN Travel LimitsStep 2: Adjust the ForceStep 3: Test the Safety Reversal System
Step 4: Test the Protector System
Note:
- Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off. Simply wait 15 minutes and try again.
- If anything interferes with the door’s upward travel, it will stop. If anything interferes with the door’s downward travel (including binding or unbalanced doors), it will reverse.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
- Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2 x 4 laid flat) on floor.
To prevent damage to vehicles, be sure fully open door provides adequate clearance.
How and when to adjust the limits:
- If the door does not open completely but opens at least five feet (1.5 m):
- Increase up travel. Turn the UP limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel.
- NOTE: To prevent the trolley from hitting the cover protection bolt, keep a minimum distance of 2-4" (5 cm - 10 cm) between the trolley and the bolt.
- If door does not open at least 5 feet (1.5 m):
- Adjust the UP (open) force as explained in Adjustment Step 2.
- If the door does not close completely:
- Increase down travel. Turn the DOWN limit adjustment screw counterclockwise. One turn equals 2" (5 cm) of travel.
- If door still won't close completely and the trolley bumps into the pulley bracket, try lengthening the door arm (page 18) and decreasing the down limit.
- If the opener reverses in fully closed position:
- Decrease down travel. Turn the DOWN limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel.
- If the door reverses when closing and there is no visible interference to travel cycle:
- If the opener lights are flashing, the Safety Reversing Sensors are either not installed, misaligned, or obstructed. See page 27.
- Test the door for binding: Pull the emergency release handle. Manually open and close the door. If the door is binding or unbalanced, call for a trained door systems technician. If the door is balanced and not binding, adjust the DOWN (close) force. See Adjustment Step 2.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
How and when to adjust the forces:- Too much force on garage door will interfere with proper operation of safety reversal system.
- NEVER increase force beyond minimum amount required to close garage door.
- NEVER use force adjustments to compensate for a binding or sticking garage door.
- If one control (force or travel limits) is adjusted, the other control may also need adjustment.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3.8 cm) object (or 2 x 4 laid flat) on floor.
Test the DOWN (close) force
- Grasp the door bottom when the door is about halfway through DOWN (close) travel. The door should reverse. Reversal halfway through down travel does not guarantee reversal on a 1-1/2" (3.8 cm) obstruction. See Adjustment Step 3, page 30. If the door is hard to hold or doesn't reverse, DECREASE the DOWN (close) force by turning the control counterclockwise. Make small adjustments until the door reverses normally. After each adjustment, run the opener through a complete cycle.
- If the door reverses during the down (close) cycle and the opener lights aren't flashing, INCREASE DOWN (close) force by turning the control clockwise. Make small adjustments until the door completes a close cycle. After each adjustment, run the opener through a complete travel cycle. Do not increase the force beyond the minimum amount required to close the door.
- Grasp the door bottom when the door is about halfway through UP (open) travel. The door should stop. If the door is hard to hold or doesn't stop, DECREASE UP (open) force by turning the control counterclockwise. Make small adjustments until the door stops easily and opens fully. After each adjustment, run the opener through a complete travel cycle.
- If the door doesn't open at least 5 feet (1.5 m), INCREASE UP (open) force by turning the control clockwise. Make small adjustments until door opens completely. Readjust the UP limit if necessary. After each adjustment, run the opener through a complete travel cycle.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
- Safety reversal system MUST be tested every month.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2 x 4 laid flat) on the floor
- With the door fully open, place a 1-1/2 inch (3.8 cm) board (or a 2 x 4 laid flat) on the floor, centered under the garage door.
- Press the remote control push button to close the door. The door MUST reverse when it makes contact with the board.
- If the door stops and does not reverse on the obstruction, the down travel needs to be increased (refer to Adjustment Step 1). Repeat the test. When the door reverses upon contact with the 1-1/2 inch board, remove the board and open/close the door 3 or 4 times to test the adjustment. If the garage door opener continues to fail the safety reversal test, call a trained door systems technician.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
- Open the door. Place the garage door opener carton in the path of the door.
- Press the remote control push button to close the door. The door will not move more than an inch (2.5 cm), and the garage door opener lights will flash 10 times.
- The garage door opener will not close from a remote control if the LED in either safety reversing sensor is off (alerting you to the fact that the sensor is misaligned or obstructed). If the garage door opener closes the door when the safety reversing sensor is obstructed (and the sensors are no more than 6 inches [15 cm] above the floor), call for a trained door systems technician.
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非常感谢 新年快乐！
1, 换个功率大点的。
2, 增加 the travel limits，参考如下：
How do I adjust the travel and force limits?
Published 11/11/2009 09:23 AM | Updated 02/17/2015 12:42 PM
How do I adjust the travel and force limits?
Limit adjustment settings regulate the points at which the door will stop when moving up or down. After adjusting the limit settings, check the Safety Reversal System and Test the Protector System. Note: Manual travel and force adjustments are adjusted using a flathead screw driver.
To operate the opener, press the door control push bar. Run the opener through a complete travel cycle.
If your door passes both of these tests, no limit adjustments are necessary unless the reversing test fails.
- Does the door open or close completely?
- Does the door stay closed and not reverse unintentionally when fully closed?
Adjustment procedures are outlined below. Run the opener through a complete travel cycle after each adjustment.
Step 1: Adjust the UP and DOWN Travel LimitsStep 2: Adjust the ForceStep 3: Test the Safety Reversal System
Step 4: Test the Protector System
Note:
Step 1: Adjust the UP and DOWN Travel Limits
- Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off. Simply wait 15 minutes and try again.
- If anything interferes with the door’s upward travel, it will stop. If anything interferes with the door’s downward travel (including binding or unbalanced doors), it will reverse.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
CAUTION
- Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2 x 4 laid flat) on floor.
To prevent damage to vehicles, be sure fully open door provides adequate clearance.
How and when to adjust the limits:
Step 2: Adjust the Force
- If the door does not open completely but opens at least five feet (1.5 m):
- Increase up travel. Turn the UP limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel.
- NOTE: To prevent the trolley from hitting the cover protection bolt, keep a minimum distance of 2-4" (5 cm - 10 cm) between the trolley and the bolt.
- If door does not open at least 5 feet (1.5 m):
- Adjust the UP (open) force as explained in Adjustment Step 2.
- If the door does not close completely:
- Increase down travel. Turn the DOWN limit adjustment screw counterclockwise. One turn equals 2" (5 cm) of travel.
- If door still won't close completely and the trolley bumps into the pulley bracket, try lengthening the door arm (page 18) and decreasing the down limit.
- If the opener reverses in fully closed position:
- Decrease down travel. Turn the DOWN limit adjustment screw clockwise. One turn equals 2" (5 cm) of travel.
- If the door reverses when closing and there is no visible interference to travel cycle:
- If the opener lights are flashing, the Safety Reversing Sensors are either not installed, misaligned, or obstructed. See page 27.
- Test the door for binding: Pull the emergency release handle. Manually open and close the door. If the door is binding or unbalanced, call for a trained door systems technician. If the door is balanced and not binding, adjust the DOWN (close) force. See Adjustment Step 2.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.How and when to adjust the forces:
- Too much force on garage door will interfere with proper operation of safety reversal system.
- NEVER increase force beyond minimum amount required to close garage door.
- NEVER use force adjustments to compensate for a binding or sticking garage door.
- If one control (force or travel limits) is adjusted, the other control may also need adjustment.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3.8 cm) object (or 2 x 4 laid flat) on floor.
Test the DOWN (close) force
Test the UP (open) force
- Grasp the door bottom when the door is about halfway through DOWN (close) travel. The door should reverse. Reversal halfway through down travel does not guarantee reversal on a 1-1/2" (3.8 cm) obstruction. See Adjustment Step 3, page 30. If the door is hard to hold or doesn't reverse, DECREASE the DOWN (close) force by turning the control counterclockwise. Make small adjustments until the door reverses normally. After each adjustment, run the opener through a complete cycle.
- If the door reverses during the down (close) cycle and the opener lights aren't flashing, INCREASE DOWN (close) force by turning the control clockwise. Make small adjustments until the door completes a close cycle. After each adjustment, run the opener through a complete travel cycle. Do not increase the force beyond the minimum amount required to close the door.
Step 3: Test the Safety Reversal System
- Grasp the door bottom when the door is about halfway through UP (open) travel. The door should stop. If the door is hard to hold or doesn't stop, DECREASE UP (open) force by turning the control counterclockwise. Make small adjustments until the door stops easily and opens fully. After each adjustment, run the opener through a complete travel cycle.
- If the door doesn't open at least 5 feet (1.5 m), INCREASE UP (open) force by turning the control clockwise. Make small adjustments until door opens completely. Readjust the UP limit if necessary. After each adjustment, run the opener through a complete travel cycle.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
- Safety reversal system MUST be tested every month.
- After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" (3.8 cm) high object (or 2 x 4 laid flat) on the floor
Step 4: Test the Protector System
- With the door fully open, place a 1-1/2 inch (3.8 cm) board (or a 2 x 4 laid flat) on the floor, centered under the garage door.
- Press the remote control push button to close the door. The door MUST reverse when it makes contact with the board.
- If the door stops and does not reverse on the obstruction, the down travel needs to be increased (refer to Adjustment Step 1). Repeat the test. When the door reverses upon contact with the 1-1/2 inch board, remove the board and open/close the door 3 or 4 times to test the adjustment. If the garage door opener continues to fail the safety reversal test, call a trained door systems technician.
WARNING
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.http://liftmaster.custhelp.com/app/answers/detail/a_id/246/~/how-do-i-adjust-the-manual-travel-and-force-limits?
- Open the door. Place the garage door opener carton in the path of the door.
- Press the remote control push button to close the door. The door will not move more than an inch (2.5 cm), and the garage door opener lights will flash 10 times.
- The garage door opener will not close from a remote control if the LED in either safety reversing sensor is off (alerting you to the fact that the sensor is misaligned or obstructed). If the garage door opener closes the door when the safety reversing sensor is obstructed (and the sensors are no more than 6 inches [15 cm] above the floor), call for a trained door systems technician.
