Why is there no master-to-master communication on my Aiphone Intercom System?
If there is no master-to-master communication on your Aiphone Intercom System, the C terminals might be mis-wired between masters. Communication flows from the # wire of the calling master to the C terminal of the receiving master. Ensure the C terminal of the master being called is wired to the # terminal selected on the calling master.
How to fix Aiphone LEF-3L when door station doesn't call in?
If the Aiphone Intercom System door station isn't calling in (no call tone or LED light), check the jumpers. For a 2-wire setup, ensure the jumper remains attached between E and — at both the door station and master station. In multi-master systems with 3 wires, remove the E / — jumper and connect all 3 wires.
Why is there no communication to the door station on my Aiphone Intercom System?
If there is no communication to the door station on your Aiphone Intercom System, the E terminal might be mis-wired. Communication relies on the connection between the 1 and E terminals of the door station to the # and E terminals of the master station. If call-in works, check the E wire for continuity. At the sub station, verify that the 1 and E wires are not reversed.
How to fix AC buzz or noise in a new Aiphone Intercom System?
If your new Aiphone Intercom System installation has AC buzz, noise, or hum, it might be too close to an AC source or use incorrect wiring. Try moving the intercom away from AC wiring or dimmer switches. Using shielded cable may also help. If noise persists with shielded wire, tie all shields together and ground them to an earth ground or the power supply's negative terminal. When using multiple jacketed cables between master stations, ensure the #, C, and E terminals are in the same jacketed cable, including an E wire in each cable carrying a station number wire.
Why Aiphone LEF-3L has no call tone between masters?
The LEF-3L unit of Aiphone Intercom System does not have the PRIVACY feature or the ability to send a call tone to another master station (as with the standard LEF-3). This function is removed to allow the switch to be used for door release instead of privacy.
How to fix Aiphone LEF-3L when door release doesn't work?
If the door release on your Aiphone intercom system isn't working, check the WHITE wire coming out of the PC board for voltage. When the door release button is pressed, there should be 12VDC across the WHITE and — wires, which activates the relay. Make sure the BLACK wires of the RY-PA are connected to the WHITE wire and either the BROWN, RED, or ORANGE wire for selective door release, which provides selective ground when the corresponding channel is selected.
What if Aiphone LEF-3L door station doesn't call in with 3-wire connection due to miswiring?
If your Aiphone intercom system's door station does not call in (no call tone or LED light) with a 3-wire connection, it could be due to miswiring of the 1 and E terminals. Check that the 1 and E wires are not reversed. If they are, communication will work, but call-in will not.
Why does Aiphone LEF master have no communication or tone but LED lights work?
If your Aiphone LEF master station has no communication or tone, but the LED lights work, the wrong power supply might be in use. The LED lights operate with a power source from 6VDC to 24VDC, but the amplifier in the LEF unit requires a 12VDC supply to function correctly. Use the proper power supply, such as the PS-1225/S/UL or PS-1215 DIN.
Why Aiphone LEF-3L Intercom System won't release door from additional masters?
If the door release function works from the first master station but not from additional master stations on your Aiphone intercom system, the selective door release wires (WHITE, BROWN, RED, ORANGE) may not be connected properly between the master stations. Verify these connections. Note that RY-PA relays are only required at one master station.
How to resolve feedback in Aiphone LEF-3L when volume is high?
Feedback in your Aiphone intercom system when the volume control is turned above halfway can be due to E / — jumpers being attached in a multi-master system. Remove these jumpers on the masters and door stations, provided there are 3 wires to the sub(s). If the sub only has 2 wires in a multi-master system, the jumper must remain in place for the door call-in to work. Running the proper wire to the door station(s) and removing all of the jumpers is the only real alternative.
Details actions to avoid, such as dismantling, and lists critical warnings for safe use.
Highlights cautions related to installation, wiring, and environmental factors to prevent damage or injury.
Provides general guidance on safe operation, placement, and use of the intercom system.
Summarizes key features like door release, CCTV integration, and system expandability.
Explains the 3-position switch for adjusting the call tone volume.
Describes the function of the selector switch for call tone behavior when the unit is occupied.
Presents a system outline diagram and lists individual components for the LEF-3L system.
Defines terminal functions and outlines color-coded wires used in the system.
Offers charts for wiring distance limitations and recommended wire gauges.
Lists precautions for safe and effective installation and wiring practices.
Explains recommended wiring methods and cable specifications for the system.
Details back wiring, surface wiring, and desk-top mounting procedures.
Specifies locations to avoid for optimal intercom performance and safety.
Provides step-by-step instructions for accessing the unit's internal connections.
Shows wiring diagrams for connecting sub or door stations to master stations.
Details wiring configurations for internal communication between master stations.
Presents wiring for master-to-sub communication without master-to-master linkage.
Shows diagrams for connecting door release relays (RY-PA) for various stations.
Describes the procedure for operating the door release function with relays.
Illustrates wiring for external signals (bell/horn) and CCTV using relays.
Explains how relays activate for external signaling and CCTV call-up.
Illustrates wiring for a system with one master and three door stations.
Shows a complex system setup with multiple masters, subs, and signaling devices.
Details the wiring for a system featuring three master stations and one sub station.
Shows the 'Parallel Method' wiring for master-to-sub communication.
Offers advice on installing surge arrestors for power supplies and communication lines.
Details procedures for calling stations and receiving calls from sub or master units.
Describes how to answer doors and operate the door release mechanism.
Addresses issues with stations not calling, loss of communication, or master-to-master problems.
Solves problems related to feedback, electrical noise, and feature availability.
Provides solutions for malfunctioning door release and external signaling devices.
Details power source, consumption, communication output, dimensions, and wiring specs.
Covers system power supply requirements and connection limitations.
Outlines the terms, conditions, and limitations of the Aiphone product warranty.
Power| power source | 12V DC |
|---|---|
| communication output (receive) | 800mW @ 20 ohms |
| communication output (transmit) | 500mW @ 20 ohms |
Wiring| wiring distance with 22AWG | 650' |
|---|---|
| wiring distance with 18AWG | 1, 600' |
| dimensions (HxWxD) | 7-1/16" x 5-5/8" x 2-3/16" |
Relay Specifications| RY-PA contact rating (AC) | 1A, 110V |
|---|---|
| RY-PA contact rating (DC) | 1A, 24V |
| use PS-1225UL | yes |
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