Da-Lite Pro Imager Horizontal Masking System - Manual (Page 7)

7
Troubleshooting
Symptom Cause Solution
Screen will not operate or will
not go “down”.
Motor does not hum.
Motor hums.
Blown facility fuse. Replace facility fuse.
Tripped facility circuit breaker. Reset circuit breaker.
No power to operating switch or junction.
Check above. Tighten all loose wire connections.
Recheck wiring. See installation instructions.
“Down” Position
Check for power across black and white leads.
Power at junction box.
Thermal overload tripped.
Let motor cool down for 15 minutes. Try again.
Defective motor, limit switch or capacitor.
Replace motor assembly.
NOTE: Motor is a sealed assembly.
Temporary binding. With power “off“ turn roller by hand to free binding.
Screen will not move “up”.
Motor does not hum.
Motor hums.
Blown facility fuse. Replace facility fuse.
Tripped facility circuit breaker. Reset facility circuit breaker.
No power to operating switch to junction box.
Check above. Tighten all loose wire connections. See above.
“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.
Defective motor, limit switch or capacitor.
Replace motor assembly.
NOTE: Motor is a sealed assembly.
Temporary binding. With power “off”, turn roller by hand to free binding.
Noise.
NOTE: Screen will operate with
a low-pitched hum.
Grinding. Foreign object in screen rubbing
on roller or fabric.
Remove.
Coasting. Defective brake. Replace motor assembly.
Roller displaced from
mounting brackets.
Pin end slipped out of nylon bearing.
Remove pin end mounting. Realign motor
in tube. Reattach pin end.
Mask hangs crooked.
Screen not installed properly. Check for level and plumb.
Fabric is damaged. Replace fabric.
Mask does not stop at
proper position.
Limit switches out of adjustment. See adjustment procedures.