AB Electriscreen: Owner’s Manual
13
Problem description
Probable cause
Action to take
Screen won't 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 availabi lity. Contact an
electrician.
Screen won't 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.
Contacts may be sticking —tap relay to
free contacts.
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 up mode.
(Screen has already
retracted.)
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 UP limit switch. Turn the adjusting
screw clockwise. See pp. 10 -11 of this
manual.
Screen drops when up
direction is activated
(grinding noise occurs).
Drop in voltage.
Screen motor requires full voltage. Have an
electrician or qualified service person check
available voltage.
Screen continues past
bottom stop position.
White limit switch is out of
adjustment.
Readjust the white DOWN limit switch. See
pp. 10-11 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 pp. 10 -11 of this
manual.
Motor shuts off. Motor has
been in use for more than
2 minutes.
Motor is designe d 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.
T
ROUBLESHOOTING
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.
