E) Testing And Adjus Ting The Safety Revers E Feature - Home Master GDR02 Operator's Manual

T he maximum force adjustment range is about ¾ of a complete turn. Do not force controls beyond that
point. T urn force adjustment controls with a screwdriver.
2. Test the DOWN (close) force. Grasp the door bottom when the door is about halfway through DOWN
(close) travel and try to stop the door. T he door should reverse. If the door is hard to hold or doesn't
reverse, DECREASE the 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.
3. Test the UP (open) force. If the door does not open fully 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.
E) Te sting and Adjusting the Safe ty Rev e rse Fe ature
- Be sure correctly adjust the safety reversal system. Failure to correctly adjust the door force controls may result in
malfunction of the emergency reverse system, which can result in damage to property, personal injury and death.
- Do not stand under the garage door opener when adjusting the safety reversal system.
Your Garage Door Opener comes with a safety feature that makes the door automatically reverse if the door
encounters an object before it fully closes.
1. With the door fully open, place a one-inch board (or a 2x4 laid flat) on the floor , cenetered under the
garage door. Operate the door in the down direction. T he door must reverse on striking the obs truction.
2. If the door stops shy of the obstruction, it is not traveling far enough in the down direction. Increase the
DOWN limit by turning the DOWN limit adjustment screw counterclockwise ¼ turn. Repeat until it hits the
board and reverses.
3. If the door stops on the obstruction but does not reverse, reduce the DOWN force by turning the
adjustment screw counterclockwise ¼ turn. Repeat until it automatically reverses when it hits the board.
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To avoid injury or death:
1/2 HP Chain Drive Garage Door Opener