Craftsman 139.53675SRT Garage Door Opener User Manual


 
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Having a Problem? (continued)
Situation
The door opens but
won't close:
Probable Cause & Solution
i i l llll lllll i i ill i i i i Illll I I N,ll
1. If the opener lights blink, check the safety reversing sensor. See page 23,
2. If the opener lights do not blink and it is a new installation, check the down force.
See Adjustment Step 2, page 29. For an existing installation, see below.
Repeat the safety reverse test after the adjustment is complete.
The door revet'ses for
no apparent reason
and opener lights
don _tblink:
1. Is something obstructing the door?. Pull the red emergency release handle. Operate
the door manually. If it is unbalanced or binding, ballfor professional garage door
service.
2. Clear any ice or snow from the garage floor area where the door closes.
3. Review the force adjustment procedures on page 29.
4o If door reverses in the fully closed position, decrease the travel limits (page 28).
Repeat safety reverse test after adjustments to force or travel limits. The need
for occasional adjustment of the force and limit seffdngs is normal. Weather
conditions in particular can affect door travel.
The door reverses for
no apparent reason
and opener lights
blink for 5 seconds
after reversing:
Check the safety reversing sensor° Remove any obstruction or align the receiving eye.
See page 23.
The opener lights:
... don't turn on:
Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener
bulb if regular bulb bums out.
... don't turn off:
ls the Light feature on? Turn it off.
The opener strains or
maximum force is
needed to operate
door:
The door may be out of balance or the springs are broken. Close the door and use the
emergency release to disconnect the trolley. Open and close the door manually, A propedy
balanced door will stay in any point of travel while being supported entirely by its springs. If it
does not, disconnect the opener and call a professional garage door serviceman° Do not
increase the force to operate the opener.
The opener motor
hums briefly, then
won't work:
The opener won't
operate due to
power failure:
1. The garage door springs are broken. See above.
2. If the problem occurs on the first operation of the opener, door may be locked. Disable
the door lock. If the chain was removed and reinstalled, the motor may be out of phase.
Remove the chain; cycle the motor to the down position, Observe the drive sprocket.
When it tums in a clockwise direction and stops in the down position, reinstall the chain.
Repeat the safety reverse test after the adjustment is complete.
1, Use the emergency release to disconnect the trolley. The doorcan be opened and dosed
manually. When the power is restored, press the Door Control push button and trolley will
automatically reconnect (unlesstrolley isinlockout pos_ono)See page 32_
2. The Emergency Key Retease accessory (for use on garages with no service door)
disconnects the trolley from outside the garage in case of power failure.
The chain droops
or sags:
It is normal for the chain to droop slightly in the closed door position. Use the
emergency release to disconnect the trolley_ If the chain retums to normal height when
the trolley is disengaged and the door reverses on a one-inch board, no adjustments
are needed (see page t 1),.
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