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Aiphone Communication Systems
1700 130th Ave. N.E.
Bellevue, WA 98005
(425) 455-0510
FAX (425) 455-0071
Toll Free Technical Support:
(800) 692-0200
FAX: (800) 832-3765
E-mail tech-serv@aiphone.com
Pg. 4
LEM-1DL Supp Instr.
# 90111
0207JDJS
TROUBLESHOOTING GUIDE:
INSTALLATION TIPS:
1. Use shielded wire for the communication path, and ground one end of the shield to an earth ground.
2. Run intercom wire at least 20" away from AC wiring, fluorescent lights or dimmer switches.
3. Keep intercom cable away from alarm, data, phone, and video cables.
4. Door release wires must be in a separately jacketed cable from the intercom wires. Use two separate
cables; one for audio and one for door release.
5. When installing a second master station, wire must be run from the first master station, not from the
door station. See diagram on page 2.
6. Do not install master station near light switches, dimmer switches, or other devices that may cause
interference with the intercom system.
7. Do not install the master station on the opposite wall from the door station. If the units are too close,
acoustical feedback may result.
PROBLEM POSSIBLE CAUSE SOLUTION
No call tone from door to master station.
(A) OFF button on master not pressed.
(B) E/- jumper not attached
(A) Press OFF button on master. If call tone still doesn't come through,
read solution (B).
(B) Make sure jumper is attached to E/- terminals on door station (or
proper wires jumpered on LS-NVP, LE-SS subs). Wire from E/- should be
connected to E of master.
No communication from door station. E/- jumper not attached
Ensure that the jumper at the door station is attached between E and -
terminals.
No call tone, no communication. Chirping sound
when volume control is turned all the way up. Wrong voltage on LEM-1DL.
Check power supply. If it's model SKK-620, remove and replace with
model PT-1210N. Verify that voltage on +/- terminals of LEM-1DL is
between 12-16V AC or 12-24V DC.
In a system with RY-AC and external signaling
device connected, the external device is activated
every time the TALK button is pressed.
DAK-2S component module missing or
installed incorrectly.
Make sure the component module is installed with the bare wire under
the 1 terminal, and the WHITE wire of the RY-AC spliced to the colored
wire.
In a dual master system, call tone is heard at the
second master when pushing the talk switch on one
master. Missing DAK-2S dual master adaptor kit
Install 1 component module from DAK-2S at each master. See
instructions on Pg. 3. If DAK-2S is not available, connect specified diode
and capacitor in parallel and install as shown on Pg. 3.
In a dual master system, feedback occurs when
pressing the talk button. One power supply is used for both masters.
Ensure that each master has its own power supply. Use any power
supply with output between 12-16V AC or 12-24V DC. Aiphone
recommends the PT-1210N.
AC noise when listening to the door station. Intercom wiring run close to AC wiring.
Ensure that the intercom wire is run at least 20" away from any AC
electrical wire, or crossed at 90 degrees. Intercom wire should be
shielded, with the drain wire connected to an earth ground at the master
end.
AC noise when talking to the door station. Power wires run with communication wires
Ensure that power wires coming from the PT-1210N are not run in the
same jacketed cable with the communication wires run to the door.