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Craftsman 139.53403 Owner's Manual Page 21

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Having a Problem? (Continued)
SITUATION
DOOR WON'T CLOSE
PROBABLE
CAUSE
& SOLUTION
i ,i I
i,ii ....
iiI
1
The infrared
Reversing
Sensor (if you have instaIJed this accessory}
may
be misaligned
or obstructed.
Disconnect
sensor
and check door opera-
tion
If problem
disappears,
correct
alignment
DOOR REVERSES
FOR
NO APPARENT
REASON
1
Is something
obstructing
the door?
Pull red emergency
release
handle
Operate
door manually
If it is unbalanced
or binding,
call a garage
door
serviceman
to correct
the problem
2
Clear any ice or snow from garage floor area where garage door closes.
3
Review the Force Adjustment
Chart on Page 17 Repeat
Safety Reverse
Test after adjustment
is complete
4.
If door reverses
in FULLY CLOSED
position,
decrease
travel
limits (See
Pg 17) and repeat Safety Reverse
Test after adjustment
is complete.
THE NEED FOR OCCASIONAL
ADJUSTMENT
OF FORCE AND LIMIT SET-
TINGS IS NORMAL. WEATHER CONDITIONS
IN PARTICULAR CAN AFFECT
DOOR TRAVEL
5_
The Infrared
Reversing
Sensor(if
you have installed
this accessory)
may
be misaligned
or obstructed.
Disconnect
sensor
and check door opera-
tion. If problem
disappears,
correct
alignment
OPENER
LIGHT
DOESN'T TURN ON
1
Replace
the light bulb (75Watts
Maximum)
Use rough
service
bulbs if
standard
bulbs burn out prematurely
due to vibration
(Vibration
may be
caused
by loose end panels_ Retighten
screws)
DOESN'T TURN OFF
1
There may be a defective
ground
at ceiling
or wall receptacle
Unit must
be grounded.
OPENER
STRAINS
OR
MAXIMUM
FORCE
IS NEEDED
TO OPERATE
DOOR
Door may be out of balance
Use emergency
release
rope and handle to
disconnect
trolley
Open
and close door manually.
A properly
balanced
door will remain in any point of travel while being sup-
ported e ntirely by its springs
If it does not, call a garage door serviceman
to
correct
problem
OPENER
MOTOR
HUMS
BRIEFLY,
THEN
WON'T
RUN
2
Trolley may be ja mined into rail stop bo_ts Pull or push on door while motor
is hu taming to release
jammed
condition
Re-adjust
door limits (Page
17)
to prevent
over-traveL
if problem
occurs on the first operation
during the installation
process
or
after the chain
was removed
and re-installed,
the motor
may be out of
phase
Remove
chain; cycle
motor to down position
(Observe
the drive
sprocket
When it turns in clockwise
direction
and stops, motor is in down
position)
Re-install
chain_
OPENER
WON'T
OPERATE
DUE TO POWER
FAILURE
1
Use emergency release rope and handle to disconnect trolley Door can
be opened and closed manually When the power is restored, press the
wall push button and trolley wilt automatically
reconnect
2
The emergency release key lock accessory (for use on garages with no
service door) disconnects the trolley from outside the garage in case of
power failure
CHAIN
DROOPS
OR SAGS
It is normal
for the chain to droop
slightly
in closed
door position
Use
emergency
release
rope and handle to disconnect
trolley
If chain returns
to normal height when trolley
is disengaged
and door re_verses on a one-
inch obstruction,
no adjustments
are needed
See Page 9
21

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