Automatic Vertical Screen: Owner’s Manual
9
T
ROUBLESHOOTING
Problem description
Probable cause
Action to take
Screen will not operate.
Door will not operate.
No AC power available.
Outboard switching problem.
Check to see if the circuit breaker has
switched off. Reset if needed.
Check outboard switching apparatus.
Check voltage availability. Contact an
electrician.
Screen will not roll up or down
(even though power is available).
Bad connection at switch.
Polarity of STI line may be bad.
Have an electrician or qualified service
person check the connection as follows:
·
If you have a
low voltage control
unit,
check switch-line connections.
·
If you have a
screen trigger interface
,
check line connections, or the mini-plugs
at the screen input or projector output.
Check 12V DC line for correct polarity.
Screen 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 retract mode.
The screen batten is retracting too
far into the case.
Failure to correct
can damage motor and screen.
Do not use the unit until this
problem is resolved.
Have a qualified service person adjust the
yellow limit switch. Turn the adjusting screw
clockwise.
Screen drops when retracted
(grinding noise occurs).
Drop in voltage.
Screen motor requires full voltage. Have an
electrician or qualified service person check
available voltage.
Screen continues past fully
extended stop position.
White limit switch is out of
adjustment.
Readjust the white limit switch. See p. 7 of
this manual.
Batten retracts too far into case.
Yellow limit switch out of
adjustment. Failure to correct can
damage motor and screen. Do not
use the unit until this problem is
resolved.
Have a qualified service person readjust the
yellow limit switch. See p. 7 of this manual.
Motor shuts off. Motor has been
in use for more than 2 minutes.
Motor is designed for short
operations (lowering and retracting),
not continuous duty. Longer
operation, such as during setup and
positioning, causes the motor to
overheat and shut off.
Allow the motor to cool down. Complete
cooling can take an hour or more. Heat
gain is cumulative and takes time to
dissipate. If motor use is initiated before it
has cooled completely, the motor will shut
down again when it reaches maximum
temperature.
Any controller (e.g., STI, LVC,
etc.) fails to operate motor.
Dirt, finger prints, marks, etc. on
screen surface.
Improper handling of screen.
Brush off or use a mild detergent solution
with clean rag or cotton swab. See p. 8 of
this manual.
Indentations appear on screen
surface.
Debris or particles adhering to
screen due to static cling.
Debris or particles may have fallen
into the housing.
Check back of screen; gently brush debris
away by hand. See p. 8 of this manual.
Refer to the following guidelines if you encounter a difficulty in the
operation of your Stewart Filmscreen. 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 the Stewart
Filmscreen Corporation.
