LiftMaster EL1SS Manual De Instrucciones

Replace the Logic Board
NOTE: After the new logic board is installed all site data must be
reentered into the EL1SS system.
1. Disconnect power to the unit.
2. Unlock the faceplate (Figure 1).
3. Disconnect all the wires from the logic board. Make note of the
wire locations for reassembly.
4. Remove the nuts (3) securing the faceplate to the housing and set
aside. Carefully remove the faceplate (Figure 2).
5. Place the faceplate on a flat surface and prop the faceplate up so
the faceplate is flat.
6. Remove the screws (4) securing the existing logic board from the
faceplate. Remove the existing logic board and discard in
accordance with local electrical disposal guidelines (Figure 3).
NOTE: If this is an in warranty replacement, DO NOT discard the
logic board. If applicable, return the logic board to LiftMaster.
7. Place a plastic washer over each of the metal standoffs. The
plastic washers MUST be installed to prevent the stand offs from
shorting out the logic board when power is reconnected. NOTE:
To help keep the components in place, insert a toothpick or short
length of wire into the standoff and slide the components over the
toothpick or short length of wire.
8. Position the new logic board on to the faceplate.
9. Place a plastic washer over the mounting holes (4) in the logic
board. If applicable, carefully remove the toothpicks or short
length of wire.
10. Fasten the new logic board to the faceplate with screws (4).
11. Reattach the faceplate to the housing using the previously
removed nuts (3).
12. Reconnect all the wires to the logic board.
13. Close the faceplate.
14. Reconnect power to the unit.
15. Reenter site data and test.
EL1SS TELEPHONE ENTRY SYSTEM
REPAIR PARTS INSTRUCTIONS
To reduce the risk of SERIOUS INJURY or DEATH:
• Disconnect electric power at the fuse box BEFORE proceeding.
• ALL electrical connections MUST be made by a qualified
individual.
• Upon completion of kit installation, the area MUST be cleared
and secured. At that time the unit may be returned to service.
Figure 1
Figure 2
Nut
Faceplate
Figure 3
Plastic
Washer
Screw
Logic Board