Da-Lite Executive Electrol - Manual (Page 7)

7
Symptom Cause Solution
Screen will not operate or will
not go “down”.
Motor does not hum.
Blown fuse. Replace fuse.
Tripped circuit breaker. Reset circuit breaker.
Improper wiring to operating switch.
Tighten all loose wire connections. Correct any improper
connections. Check for power.
“Down” Position
Check for power across black and white leads.
“Up” Position
Check for power across red and white leads.
Improper wiring to junction box in screen.
NOTE: Use low voltage control (LVC) electrical
checklist for 3-button control.
Defective wall switch.
Defective LVC unit.
“Down” Position
Check for power at black and white leads.
“Up” Position
Check for power at red and white leads.
Shut power “off” at breaker. Remove wall switch and
check for broken or loose connection. Replace if
defective.
Check LVC electrical checklist.
Thermal overload tripped (excessive
overheating).
Let motor cool down for 15 minutes. Try again.
Burned out motor winding.
Disconnect motor leads and check for continuity
between black and white wires for “down” position.
Check for continuity between red and white wires for
“up” position. Replace gear motor if either combination
shows an open circuit.
Defective limit switch.
Disconnect “down” limit switch from circuit. Check for
continuity. Switches are normally closed and open on
contact. Replace if defective.
Motor hums.
Temporary fabric binding. With power “off,” turn roller by hand to free binding.
Shipping bracket not removed. Remove shipping bracket and wooden wedge.
Defective capacitor. Replace capacitor.
Troubleshooting