Craftsman 13953403 user manual download (Page 21 of 24)

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Page 21 of 24
Having
a
Problem?
(Continued)
SITUATION
DOOR WON'T CLOSE
PROBABLE
CAUSE
& SOLUTION
i
,i
I
i,ii
....
ii
I
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
Sample