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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, uorescent 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 rst 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.
TROUBLESHOOTING GUIDE:
Aiphone Communcation Systems
1700 130th AVE N.E.
Bellevue, WA 98005
(425) 455-0510
FAX (425) 455-0071
Toll Free Technical Support:
1-800-692-0200
E-mail tech@aiphone.com
LEM-1DL Supplement
Pg. 4
#90111
1109JD
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 a model SKK-620, remove and
replace with model PT-1210N. Verify that voltage on +/-
terminals 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 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
button on one master.
Missing DAK-2S dual master adaptor
kit.
Install 1 component module from the DAK-2S at each master.
See Pg. 2. If DAK-2S is not available, connect specied 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” from any AC
electircal 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 jacket cable with the communication wires run
to the door.