Aiphone C-123LW Manuale Utente

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, fl uorescent lights or dimmer switches. 

3.  Keep intercom cable away from alarm, data, phone, video cables, and any other potential source of 
     interference.

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 fi rst master station, not from the   

     

     door station. See diagram on page 2. 

6.  Do not install the 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.

Aiphone Communcation Systems
1700 130th AVE N.E.
Bellevue, WA 98005
(425) 455-0510
FAX (425) 455-0071

1-800-692-0200

E-mail tech@aiphone.com

C-123LW Supplement

Pg. 4

#90102

0610JD

No call in from door to master, but 
communication works fi ne.

Reversed DAK-2S component module.

When door calls in, it shorts the #1 terminal to the E terminal.  
If the DAK-2S is installed backwards the chime from the 
door call-in will not be heard.  Install the DAK-2S component 
module with the bare wire under the 1 terminal, and the door 
station 1 wired to the colored wired end of the DAK-2S.

When the talk button is pressed, the other 
master rings.

Missing or reversed DAK-2S 
component module.

Install the DAK-2S component module as described above 
and shown on the dual master instructions.

When the talk buton is pressed, feedback is 
heard at both masters.

Common power supply.

If both C-ML/A’s share the same power supply, a ground loop 
feedback will occur when the talk button is pushed.  Install a 
separate power source for each master.

Unit appears dead; No functionality

Terminals 1 and - crossed

+/- are on left column, E/1 are on right column. If swapped, 
unit will appear dead. Verify that 1 from the door station is 
connected to 1, and negative of power supply is connected to -.

System squeals and batteries get hot

Power supply and batteries both 
installed.

Take batteries out of the master station.  Both power sources 
cannot be used simultaneously.

Chime tone sounds weak, low frequency

Weak batteries or low voltage.

If batteries are installed, replace them.  If using a power 
supply, check for 6VDC.  If low, install a new SKK-620.

Master stays on; does not time out.

Incorrect cable being used.

Volume control not adjusted properly.

Standard volume level.

If the resistance of the wire is too great, usually from 
exceeding distance limitations, the master may not time out as 
designed.  Refer to wire specifi cations in the instructions.

Remove front cover of the C-ML/A and locate volume 
potentiometer through hole at bottom of unit.  Use a small 
screwdriver to adjust the volume, clockwise to increase.

There is not a separate call tone volume adjustment on the 
C-ML/A so the volume level cannot be altered.  Surface mount 
component level modifi cation would be required, which is not 
paractical

RY-AC external signaling relay not working.

Missing or wrong connection.

Make sure the negative from the 12VDC supply for the RY-AC 
is connected to the negative of the C-ML/A master.  Make sure 
the WHITE wire of the RY-AC is connected to the DAK-2S 
component module to terminal 1, not negative terminal.

Voice volume is too loud or too soft.

Chime tone volume is too loud.