Troubleshooting
Symptom
If screen is not responding
properly and SCB100 or
SCB200 controls are used,
contact the factory for
troubleshooting assistance.
Screen will not operate or will
not go "down".
Motor does not hum.
Motor hums.
Screen will not move upward.
Motor does not hum.
Motor hums.
10
Cause
Incorrect line voltage.
Blown facility fuse.
Tripped facility circuit breaker.
No power to operating switch
or junction box.
Power at junction box.
Thermal overload tripped.
Broken wire in the "down" position.
Defective motor, limit switch or capacitor.
Capacitor burned out.
Incorrect line voltage.
Blown facility fuse.
Tripped facility circuit breaker.
No power to operating switch or junction box.
Open door limit switch.
Power at junction box. Thermal overload tripped.
Broken wire in the "up" position.
Defective motor, limit switch or capacitor.
Capacitor burned out.
Solution
Verify 115-125V (or 220-240V). If insufficient voltage,
rewire incoming electric line.
Replace facility fuse.
Reset facility circuit breaker.
Check above. Tighten all loose wire connections.
Recheck wiring. See installation instructions.
"Down" Position
Check for power across black and white leads.
Let motor cool down for 15 minutes. Try again.
Check for continuity.
Replace motor assembly. NOTE: Motor is a sealed assembly.
Replace motor assembly.
Verify 115-125V (or 220-240V). If insufficient voltage,
rewire incoming electric line.
Replace facility fuse.
Reset facility circuit breaker.
Check above. Tighten all loose wire connections. See above
"Up" Position
Check for power across red and white leads..
Replace switch.
Let motor cool down for 15 minutes. Try again.
Check for continuity.
Replace motor assembly. NOTE: Motor is a sealed assembly.
Replace motor assembly.
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