16
Stewart Filmscreen Corporation
Problem description
Probable cause
Action to take
Screen continues past bottom
stop position.
White limit switch is out of
adjustment.
Readjust the white DOWN limit
switch. See pages 12-13 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 UP limit
switch. See pages 12-13 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.
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.
