7
TROUBLESHOOTING
SYMPTOM
If screen is not responding properly and
SCB100 or SCB200 controls are used,
contact the factory for troubleshooting
assistance.
1.
Screen will not operate or will not go
“down”
.
Motor does
not
hum.
Motor
hums.
2.
Screen will not move
upward.
Motor does
not
hum.
Motor
hums.
CAUSE
(a)
Incorrect line voltage.
(b) Blown facility fuse.
(c)
Tripped facility circuit breaker.
(d)
No power
to operating switch or
junction box.
Power at junction box.
(e) Thermal overload tripped.
(f)
Broken wire in the
“down”
position.
(g) Defective motor, limit switch or
capacitor.
(h) Capacitor burned out.
(a)
Incorrect line voltage.
(b) Blown facility fuse.
(c)
Tripped facility circuit breaker.
(d)
No power
to operating switch or
junction box.
(e) Open door limit switch.
Power at junction box
(f)
Thermal overload tripped.
(g) Broken wire in the
“up”
position.
(h) Defective motor, limit switch or
capacitor.
(i)
Capacitor burned out.
SOLUTION
(a)
Verify 115-125V (or 220-240V). If
insufficient voltage, rewire incoming
electric line.
(b) Replace facility fuse.
(c)
Reset facility circuit breaker.
(d) Check above. Tighten all loose wire
connections. Recheck wiring. See
installation instructions.
“Down” Position
Check for power across black and white
leads.
(e) Let motor cool down for 15 minutes.
Try again.
(f)
Check for continuity.
(g) Replace motor assembly.
NOTE: Motor is a sealed assembly.
(h) Replace motor assembly.
(a)
Verify 115-125V (or 220-240V). If
insufficient voltage, rewire incoming
electric line.
(b) Replace facility fuse.
(c)
Reset facility circuit breaker.
(d) Check above. Tighten all loose wire
connections. See above.
“Up” Position
Check for power across red and
white leads.
(e) Replace switch.
(f)
Let motor cool down for 15 minutes.
Try again.
(g) Check for continuity.
(h) Replace motor assembly.
NOTE: Motor is a sealed assembly.
(i)
Replace motor assembly.
