6
Printed in U.S.a.
77607 Rev. 3/95
TROUBLESHOOTINg
SYMPTOM
1. Screen will not operate.
Motor does
not
hum.
2.
Incorrect stopping position in
downward
direction.
3.
Incorrect stopping position in
upward
direction.
4.
Noise.
NOTE: Screen will operate with a
low pitched hum.
5.
Coasting.
CAUSE
(a) Incorrect line voltage.
(b) Blown fuse.
(c) Tripped circuit breaker.
(d) No power to operating switch
or junction.
Power at junction box
(e) Thermal overload tripped.
(f) Broken wire in the
“down”
or
“up”
position.
(g) Defective motor, limit switch or
capacitor.
(h) Capacitor burned out.
(a)
“Down”
limit switch out of
adjustment
(a)
“Up”
limit switch out of
adjustment
(a) Gear Noise.
(a) Defective brake.
SOLUTION
(a) Verify 115-125V (or 220-240V). If
insufficient voltage, rewire incom-
ing electric line.
(b) Replace fuse.
(c) Reset circuit breaker.
(d) Check above. Tighten all loose
wire connections. Correct any
improper connections.
“Down” Position
Check for power across black
and white leads.
“Up” Position
Check for power across red
and white leads.
(e) Let motor cool down for 15
minutes. Try again.
(f) Check for continuity. Cut off old
splice and reconnect.
(g) Replace motor assembly.
NOTE: Motor is a sealed assembly.
(h) Replace motor assembly.
(a) See installation instructions.
(a) adjust
“up”
limit switch. See
installation instructions
(a) Replace motor assembly.
(a) Replace motor assembly.
