Chamberlain HD750WF Manual page 34

Operation
Using your Garage Door Opener
The garage door opener can be activated with a wall-mounted door control, remote control,
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wireless keyless entry, MyQ Smartphone Control app or MyQ
door is closed and the garage door opener is activated the door will open. If the door senses an
obstruction or is interrupted while opening the door will stop. When the door is in any position
other than closed and the garage door opener is activated the door will close. If the garage door
opener senses an obstruction while closing, the door will reverse. If the obstruction interrupts the
sensor beam the garage door opener lights will blink 10 times. If the door is fully open, and the
safety reversing sensors are not installed, or are misaligned, the door will not close from a remote
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control, TTC, or the MyQ Smartphone Control app. However, you can close the door by holding
the button on the door control or the ENTER button on the keyless entry until the door is fully
closed.
The garage door opener light bulbs will turn on when the opener is initially plugged in; power is
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restored after interruption, or when the garage door opener is activated. The lights will turn off
automatically after 4-1/2 minutes. The lights will turn on when someone enters through the open
garage door and the safety reversing sensor infrared beam is obstructed, see page 34. Use an
incandescent A19 light bulb (100 watt maximum) or for maximum energy efficiency a 26W (100W
equivalent) compact fluorescent light (CFL) bulb. NOTE: Do not use halogen, short neck, or
specialty light bulbs as these may overheat the end panel or light socket. Do not use LED bulbs
as they may reduce the range or performance of your remote controls.
To Open the Door Manually
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Garage Door Monitor. When the
To prevent possible SERIOUS INJURY or DEATH from a falling garage door:
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DISCONNECT THE TROLLEY
TO RECONNECT THE TROLLEY
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If possible, use emergency release handle to disengage trolley ONLY when garage door is
CLOSED. Weak or broken springs or unbalanced door could result in an open door falling
rapidly and/or unexpectedly.
NEVER use emergency release handle unless garage doorway is clear of persons and
obstructions.
NEVER use handle to pull door open or closed. If rope knot becomes untied, you could fall.
1. The door should be fully closed if possible.
2. Pull down on the emergency release handle so the trolley release arm snaps to the vertical
position. The door can now be raised and lowered as often as necessary.
1. Pull the emergency release handle toward the garage door opener so the trolley release arm
snaps to the horizontal position. The trolley will reconnect on the next UP or DOWN operation,
either manually or by using the door control or remote control.