Chamberlain 3900PLD Garage Door Opener User Manual


 
21
OPERATION
Using Your Door 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 obstructed while closing, the door will reverse. If the
obstruction interrupts the sensor beam, the operator
lights will blink for five seconds.
6. If obstructed while opening, the door will stop.
7. If fully open, the door will not close when the beam is
broken. The sensor has no effect in the opening cycle.
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
WARNING WARNING
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.
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.
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 door operator
BEFORE making ANY repairs or removing covers.
13.
SAVE THESE INSTRUCTIONS.