Part replacement
December 10, 2007
Front Access Full Matrix LED Sign Maintenance Manual (pn 1507610501 rev. A)
43
7.
Slide the new fan into the frame pointing in the correct direction (intake fan pointing toward inside of
sign, exhaust fan pointing toward outside of sign).
8.
Reattach the fan guards with the 6-32 screws and nuts.
9.
Reinstall the fan panel by sliding the panel in the fan panel slot.
10.
Retighten the fan panel with the four screws.
11.
Cut wires to length and strip 5/16”.
12.
Connect the fan wire harness to the terminal blocks.
•
Black to black.
•
White to white.
•
Yellow to yellow.
•
Blue to blue.
•
Red to red.
13.
Verify that the wires are connected correctly; incorrect wiring will result in damage.
14.
Apply AC to the sign.
Fan test
Use a heat gun directed at the fan thermostat to verify fan operation. The thermostat located on the controller
plate must be heated to 120ºF (50ºC) to initiate fan operation.
Notice:
Move the heat gun around to avoid burning the wiring.
•
Verify the fan is blowing in the correct direction (intake fan pointing toward inside of sign, exhaust fan
pointing toward outside of sign).
•
Have the central controller of sign run a fan test to verify fan status.
Heater replacement
➩
To replace a heater
1.
Open the sign. See “Opening a sign” on page 28.
2.
Locate the heater to be replaced.
3.
Remove the 1/4-20 bolts securing the heater to the fan frame.
4.
Disconnect the two 10-32 screws connecting the heater to AC power.
5.
Attach wiring to the new heater and secure the heater to the fan frame with the 1/4-20 bolts.
Note:
Make sure the wiring does not come in contact with the heater. Wiring can be connected to any
post on heater (no polarization).
WARNING!
Hazardous voltage. Contact with high voltage may cause serious injury or death. Always
disconnect power to unit prior to servicing.
WARNING!
Do not touch the heater. The surface is hot and may result in injury.
