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