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9. Opener strains:
Door may be unbalanced or springs are broken. Close
door and use manual release rope and handle to
disconnect trolley. Open and close door manually. A
properly balanced door will stay in any point of travel
while being supported entirely by its springs. If it does
not, call for professional garage door service to correct
the problem.
10. Opener hums briefly, then won't work:
• Garage door springs are broken. SEE ABOVE.
• If problem occurs on first operation of opener, door is
locked. Disable door lock.
Repeat safety reverse test after adjustment is complete.
11. Opener won't activate due to power failure:
• Check battery backup system on page 16.
• Pull manual release rope and handle down to
disconnect trolley. Door can be opened and closed
manually. When the power is restored, pull the manual
release handle down and toward opener. The next time
the opener is activated, the trolley will re-connect.
• The Outside Quick Release accessory (if fitted)
disconnects the trolley from outside the garage in case
of power failure.
TROUBLE SHOOTING
1. Opener doesn't operate from either door control or
remote:
• Does the opener have electric or battery power? Plug
lamp into outlet. If it doesn't light, check the fuse box or
the circuit breaker. (Some outlets are controlled by a
wall switch.)
• Have you disengaged all door locks? Review installation
instruction warnings on page 1.
• Is there a build-up of ice or snow under door? The door
may be frozen to ground. Remove any obstruction.
• The garage door spring may be broken. Have it
replaced.
• Check battery LED for status, refer page 16.
2. Door operates from door control but not from
remote:
• Replace batteries in the remote if necessary.
• If you have two or more remotes and only one operates,
review Program Your Opener, Remote and Keyless
Entry pages 21 and 22.
• Is the Locked mode displayed on the LCD? The opener
is in lock mode. Push and hold the Lock button for 2
seconds.
3. Remote has short range:
• Check the battery in the remote is fully charged.
• Change the location of the remote control on the car.
• A metal garage door, foil-backed insulation or metal
siding will reduce the transmission range.
4. Door reverses for no apparent reason and opener
light flashes 10 times after reversing:
Check The Protector System™ (if you have installed this
accessory). If the light is flashing, correct alignment.
5. The garage door opens and closes by itself:
Make sure remote push button is not stuck "on".
6. Door stops but doesn't close completely:
Repeat Setting the Limits, refer page 17.
Repeat safety reverse test after any adjustment of door
arm length, close force or down limit.
7. Door opens but won't close:
• Check The Protector System™ (if you have installed this
accessory). If the light on the Beams are flashing,
correct the alignment.
• If opener light does not flash and it is a new installation,
repeat Setting the Limit and Force page 17.
Repeat the safety reverse test after the adjustment is
complete.
8. Opener lights do not turn on:
Unit may be operating on battery power.
• Check battery status LED, refer page 16.
• Replace light bulb (230 V/40 W maximum).
Summary of Contents for MT3850EVO
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