Da-Lite Multi Mask Imager - Manual (Page 7)

7
Troubleshooting
Refer to the following guidelines if you encounter a difficulty in the operation of your Da-Lite Multi-Mask Imager screen.
Problems related to electrical or motor function may require a qualified service person or electrician.
Should you have a problem that is not addressed here, call Da-Lite customer service.
Symptom Cause Solution
Mask won't operate.
No 120V/220V power available.
Check to see if the circuit breaker has switched off.
Reset if needed.
Outboard switching problem.
Check outboard switching apparatus. Check voltage
availability. Contact and Electrician..
Mask won't roll up or down
(even though power is
available).
Bad connection at switch.
Have an electrician or qualified service person check
the connection as follows:
• If you have a high voltage control switch,
check switch line connections.
• If you have a low voltage control unit,
check switch line connections.
Mask roller chatters when
power is activated. Can be caused by voltage drop, bad connections
or a defective switch. Have an electrician or qualified service person
check all hook-ups including all outboard wiring.
Unit hums in up mode (Mask
has already retracted).
The mask batten is retracting too far into the case.
Failure to correct can damage motor. Do not use
the unit until this problem is resolved.
Have a qualified service person adjust the UP limit switch.
Turn the adjusting screw clockwise.
Mask drops when up direction
is activated (grinding noise
occurs).
Drop in voltage.
Mask motor requires full voltage. Have an electrician or
qualified service person check the available voltage.
Mask continues past bottom
stop position.
White limit switch is out of adjustment. Re-adjust the Down limit switch. See pp. 6-7 of this manual.
Batten retracts too far into
frame.
Yellow limit switch out of adjustment. Failure to
correct can damage motor. Do not use the unit
until this problem is resolved.
Have a qualified service person adjust the
UP limit switch. See pp. 6-7 of this manual.
Dirt, fingerprints, marks, etc. on
screen surface.
Improper handling of screen.
Brush off or use a mild detergent solution
with clean rag or cotton swab.
Indentations appear on screen
surface. Debris or particles adhering to screen
due to static cling.
Check back of screen: gently brush debris away by hand.
Horizontal mask jams upon
retraction.
The unit was not level and plumb when mounted. Remount the unit making sure that it is level and plumb.