LEM System Trouble Shooting

1. LEM system has a buzz or hum.

Wire was run too close to AC voltage or fluorescent lights. Shielded wire is recommended. If shielded wire was run, connect one end of the shield to an earth ground.

Refer to LEM Instructions.

2. LEM-1DL system has a buzz or hum.

1. Wire was run too close to AC voltage or fluorescent lights. Shielded wire is recommended. If shielded wire was run, connect one end of the shield to an earth ground.

Refer to LEM-1DL Instructions.

2. Make sure that the wires from the power supply are not run in the same cable as the door station wires. If they are, move them to a separate cable.

Refer to LEM-1DL Instructions.

3. Newly installed LEM-1DL is completely dead.

Wrong power supply (LEM-1DL requires the PT-1210N). Voltage for the LEM-1DL can be 12-16V AC or 12-24V DC.

Refer to LEM-1DL Instructions.

4. New installation, communication with the sub is fine, but no call tone (or call tone but no communication).

Jumper between "E" and "-" terminals at the door station has been removed and must be reinstalled.

Refer to LEM Instructions or LEM-1DL Instructions.

5. Dual LEM system, feedback when either master tries to communicate with the door.

Is there only one power supply on the system? Each LEM-1DL requires its own PT-1210N.
Each LEM1- or LEM-3 requires its own SKK-620.

Refer to DAK-2S Instructions.

6. Dual LEM system, when one master tries to communicate with the door a call tone is heard at the other master.

Dual Adapter Kit (DAK-2S) is not installed or is installed backwards. (Use one component module per master station, bare leg connected to "1" terminal.)

Refer to DAK-2S Instructions.

Back to Top