Da-Lite Tensioned Large Dual Masking Electrol - Manual (Page 6)

6
Troubleshooting
Symptom Cause Solution
Screen will not operate
and motor does not hum.
Incorrect line voltage.
Verify 115-125V (or 220-240V). If insufficient voltage, rewire
incoming electric line..
Branch circuit fuse blown. Replace fuse.
Tripped branch circuit breaker. Reset circuit breaker.
No power to operating switch or junction.
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.
Power at junction box
Thermal overload tripped.
Let motor cool down for 15 minutes. Try again.
Broken wire in the “down” or “up” position. Check for continuity. Cut off old splice and reconnect.
Defective motor, limit switch or capacitor. Replace motor assembly. NOTE: Motor is a sealed assembly.
Motor capacitor burned out. Replace motor assembly.
Incorrect stopping position in
downward direction.
Lost roller wrap. See instructions below.
“Down” limit switch out of adjustment. See installation instructions.
Incorrect stopping position in
upward direction.
Lost roller wrap. See instructions below.
“Up” limit switch out of adjustment. Adjust “up” limit switch. See installation instructions.
Noise.
NOTE: Screen will operate
with a low pitched hum.
Gear Noise. Replace motor assembly.
Coasting. Defective brake. Replace motor assembly.