Da-Lite TENSIONED EXECUTIVE ELECTROL Manuel d'installation télécharger pdf (Page 6)

TROUBLESHOOTING

SYMPTOM

1. Screen will not operate or will not

go “down”.

Motor does not hum.

2. Motor hums.

CAUSE

(a) Blown fuse.

(b) Tripped circuit breaker.

(c) Improper wiring to operating

switch.

(d) Improper wiring to junction box in

screen.

NOTE: Use low voltage control (LVC)

electrical checklist for either 1- or 3-

button control.

Defective wall switch.

Defective LVC unit.

(e) Thermal overload tripped (exces-

sive overheating).

(f) Burned out motor winding.

(g) Defective limit switch.

(a) Temporary fabric binding.

(b) Shipping bracket not removed.

(c) Defective capacitor.

SOLUTION

(a) Replace fuse.

(b) Reset circuit breaker.

(c) Tighten all loose wire connec-

tions. Correct any improper con-

nections. Check for power.

“Down” Position

Check for power across black and

white leads.

“Up” Position

Check for power across red and

white leads.

(d) “Down” Position

Check for power at black and

white leads.

“Up” Position

Check for power at red and

white leads.

Shut power “off” at breaker.

Remove wall switch and check

for broken or loose connection.

Replace if defective.

Check LVC electrical checklist.

(e) Let motor cool down for 15 min-

utes. Try again.

(f) Disconnect motor leads and

check for continuity between

black and white wires for “down”

position. Check for continuity be-

tween red and white wires for

“up” position. Replace gear motor

if either combination shows an

open circuit.

(g) Disconnect “down” limit switch

from circuit. Check for continuity.

Switches are normally closed and

open on contact. Replace if de-

fective.

(a) With power “off,” turn roller by

hand to free binding.

(b) Remove shipping bracket and

wooden wedge.

(c) Replace capacitor

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