TROUBLE
SHOOTING
GUIDE
PARTS
LIST
. .
This trouble shooting guide
is
for you to compare
the
problem with
the
possible
cause.
l.
102152- l
Cover Assembly
SYMPTOM
POSSIBLE
CAUSE
Light
cycles
on and off every
3-4
Short
in
wall pushbutton or push-
seconds.
button
circuit.
2.
102147- l Motor Support
3.
102142-l
Motor
4.
102137-·l
Motor Mounting Angle
()
5.
102105- l Motor Bracket
6.
102101-l
Safety
Trigger
7.
104047-l
Circuit
Board Mounting
Door starts down,
runs
l second
*
Open
safety
switch or
safety
and reverses. switch
circuit.
Bracket
8.
104036- l
Circuit
Board Mounting
Bracket
9.
104103-2
Circuit
Board
Door starts up, runs l second and
*
Open
safety
switch or safety
10.
77543
Lim
it
Switch
stops.
switch
circuit.
l
l.
77156
-l
Capacitor
12
.
77452
Capacitor
Clip
Door runs down, hits floor and re-
Improper adjustment
of
down limit
verses within
l/2
second.
switch
dog.
13.
102149- l
Limit Switch
Arm
14.
102156-l Tension Spring
15.
104089-l
Lim
it
Switch Bracket
Door limit switch dog
slipping.
* Defective limit
switch.
Assembll
16.
604058-l
Termina Strip
17.
104040-l
Sensitivity Switch
*
Defective
circuit
board.
18.
80628
-l
Adapter
19.
76877-12 Strain Relief Bushing
Door starts down,
runs
longer than
Obstruction
in doorway or roller
l
second,
then reverses.
pathway.
20.
77085
Power Cord
21.
102145-l Main Frame
22.
104050-l Eyelet
* Hard operating or
defective
door.
Sensitivity control
set
too
light.
23.
102102
-l
Safety
Trigger Retainer
24.
102087-l
Sensitivity Spring
25.
104086-l Main Drive
Gear
Assembly
Door raises,
carriage
hits power-
Improper adjustment
of
up limit
head.
switch
dog.
26.
102103- l Chain Idler
27.
102106
-l
Support Bracket
28.
102104-l
Motor
Guard
Up
limit switch dog
slipping.
29.
102151 - l
Boom
Bracket
(3
piece)
* Limit switch
defective.
102151-2
Boom
B
racket
(l piece)
30.
604067-l
Lampholder
* Defective
circuit
board.
31.
86168
-3
Nylon Snap Bushing
32.
102144-l
Cable
Dog
Door starts up, runs longer than l
Obstruction
in
doorway or roller
second, then stops.
pathway.
33.
104059- l Light
Lens
34.
104039-l Lampholder Bracket
35.
80813 - l Wire,
Bel
I Cord
* Hard operating or
defective
door.
36.
86147
Push
Button
Improper adjustment
of
sensitivity
control.
PARTS
AND
SERVICE
Door runs up,
won't
run down.
*
Down
limit switch or down limit
switch
circuitry
open .
For
parts and service,
contact
the
* Defective
circuit
board.
nearest Overhead Door Distributor.
Door
runs
down,
won't
run
up.
*
Up
limit switch or up limit switch
When ordering parts,
specify:
circuitry
open.
* Defective
circuit
board.
MODEL
NUMBER
Door
runs
down, hits obstruction,
* Defective
safety
switch, safety
does not reverse immediately,
switch
circuit,
or safety switch
PART
NUMBER
but reverses
in
30 seconds.
mechanism .
PART
DESCRIPTION
Door will not open
from
radio or
Operator
unplugged .
pushbutton.
* Defective radio
receiver.
Repairs to transmitter and receiver
should be performed by a qualified
* Defective
circuit
board.
repairman. See Radio Control
Instructions.
Motor
overheated.
Motor
runs, door
wi
11
not
open.
* Broken
chain,
chain
-
cable,
drive
sp
r
ocket,
or drive
gear
.
*
Re
quires
the
assist
ance
of
a qualified repairman .
Page
22
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