Troubleshooting - Chamberlain 8500W User Manual

Troubleshooting

The garage door opener doesn't operate from either the door
control or the remote control:
• Does the garage door opener have electric power? Plug a lamp
into the outlet. If it doesn't light, check the fuse box or the
circuit breaker. (Some outlets are controlled by a wall switch.)
• Have you disabled all door locks? Review installation instruction
warnings on page 3.
• Is there a build-up of ice or snow under the door? The door may
be frozen to the ground. Remove any restriction.
• The garage door spring may be broken. Have it replaced.
My remote control will not activate the garage door:
• Verify the lock feature is not activated on the door control.
• Reprogram the remote control.
• If the remote control will still not activate the door check the
diagnostic codes to ensure the garage door opener is working
properly.
The remote control has short range:
• Change the location of the remote control in your car.
• Some installations may have shorter range due to a metal door,
foil backed insulation, or metal garage siding.
The door doesn't open completely:
• Check power door lock.
• Is something obstructing the door? Is it out of balance, or are
the springs broken? Remove the obstruction or repair the door.
The door opens but won't close:
• Check cable tension monitor. If a 2nd cable tension monitor has
been removed, unplug and plug in the garage door opener twice
to reset it.
• If the garage door opener lights blink, check the safety reversing
sensors (see page 12).
• If the garage door opener lights don't blink and it is a new
installation see Adjustment Step 1. For an existing installation,
see below.
Repeat the safety reverse test after the adjustment is complete.
The door reverses for no apparent reason and garage door
opener lights don't blink:
• Check cable tension monitor (see Installation Step 4). If a 2nd
cable tension monitor has been removed, unplug and plug in the
garage door opener twice to reset it.
• Is something obstructing the door? Pull the emergency release
handle. Operate the door manually. If it is unbalanced or
binding, call a trained door systems technician.
• Clear any ice or snow from the garage fl oor area where the door
closes.
• Review Adjustment Step 1.
Repeat safety reverse test after adjustments.
My door will not close and the light blinks:
The safety reversing sensor must be connected and aligned
correctly before the garage door opener will move in the down
direction.
• Verify the safety sensors are properly installed, aligned and free
of any obstructions.
The garage door opener strains to operate door:
• The door may be out of balance or the springs may be broken.
Close the door and use the emergency release handle to
disconnect the door. Open and close the door manually. A
properly balanced door will stay in any point of travel while
being supported entirely by its springs. If it does not, disconnect
the garage door opener and call a trained door systems
technician.
The garage door opener motor hums briefl y, then won't work:
• The garage door springs may be broken. See above.
• If the problem occurs on the fi rst operation of the garage door
opener, door may be locked. Disable the power door lock.
The garage door opener won't operate due to power failure:
• Manually open the power door lock.
• Use the emergency release handle to disconnect the door.
The door can be opened and closed manually. When power is
restored, pull manual release a second time.
• When in Battery Backup mode, the opener should be able to
operate up to 20 times.
Door loses limits:
• Collar not tightened securely. Tighten collar and reprogram
limits (see Adjustment Step 1).
The garage door opener moves when the door is in operation:
• Some minor movement is normal for this product. If it is
excessive the collar will wear prematurely.
• Check to make sure the torsion bar is not moving left/right
excessively.
• Check to make sure the torsion bar is not visibly moving up and
down as it rotates.
• Check that the opener is mounted at a right angle to the
jackshaft. If not, move the position of the mounting bracket.
The garage door is beeping and the red LED is fl ashing:
The battery charge is low or the battery is dead.
• Replace the battery.
MyQ Smartphone Control, wireless MyQ devices, and Timer-To-
Close will not work:
• When in Battery Backup mode, MyQ Smartphone Control,
wireless MyQ devices and Timer-To-Close will be disabled.
• MyQ Remote LED Light must be installed to enable use of
Timer-to-Close or MyQ Smartphone Control of the door. Plug in
the MyQ Remote LED Light and make sure it is programmed to
the garage door opener. It may take up to 5 minutes to enable
Timer-to-Close and MyQ Smartphone Control.
Automatic door lock connector will not fi t the door opener plug:
Older model 24V door locks are incompatible. Use automatic door
lock model 841LM.
Automatic garage door lock does not activate when garage door
opens or closes:
In battery backup mode, the automatic garage door lock will unlock
when the garage door is opened, and will remain disabled until
power is restored.
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