Aiphone LEM-1 Open Voice Master Intercom User Manual

1. Product Overview

The Aiphone LEM-1 is an open voice master intercom station designed for clear audio communication. It functions as a primary station, capable of connecting with one door station or a sub-master intercom station (sold separately). This unit facilitates communication with visitors at an entry point or between different rooms within a building, enhancing security and convenience.

Key features include the ability to initiate and receive calls, a listening feature for monitoring, and adjustable audio volume for optimal sound clarity.

2. Safety Information

Please read all instructions carefully before installation and operation to ensure safe and proper use of the Aiphone LEM-1 intercom system.

• Electrical Safety: Ensure all wiring is performed by a qualified professional in accordance with local electrical codes. Disconnect power before performing any installation or maintenance.
• Indoor Use Only: This unit is designed for indoor use. Do not expose it to rain, moisture, or extreme temperatures.
• Power Source: Use only the specified 6V AC power source. Using an incorrect power source can damage the unit and void the warranty.
• Mounting: Mount the unit securely on a stable surface to prevent accidental falls.

3. Package Contents

Upon opening the package, verify that all components are present:

• Aiphone LEM-1 Master Intercom Unit
• Mounting Hardware (screws, anchors)
• User Manual (this document)

4. Setup and Installation

4.1. Wiring

The Aiphone LEM-1 requires a 6V AC power source and uses a 2-conductor wire type. For optimal performance and to ensure proper communication distance, adhere to the following wiring guidelines:

• Wire Type: 22 AWG (American Wire Gauge) is recommended.
• Conductors: 2 Conductors are required for connection.
• Maximum Distance:
  • Up to 1,570 ft (approximately 478 meters) using 18 AWG wire.
  • Up to 650 ft (approximately 198 meters) using 22 AWG wire.
• Power Source: Connect to a stable 6V AC power supply.
• Compatibility: This unit is designed for use with Aiphone LE Series door stations and sub-master intercoms.

4.2. Mounting

The LEM-1 unit should be mounted securely in a convenient indoor location. Use the provided mounting hardware for installation.

• Dimensions: The unit measures approximately 6.7 inches (L) x 5.6 inches (W) x 2.3 inches (H).
• Placement: Choose a location that allows for clear audio transmission and easy access to controls.

Figure 1: Front view of the Aiphone LEM-1 Open Voice Master Intercom. The unit is white, featuring a large circular speaker grille at the top. Below the speaker, there is a control panel with three buttons: 'OFF', 'CALL', and 'TALK', clearly labeled. The model number 'LEM-1' is also visible on this panel. The overall design is compact and functional.

5. Operating Instructions

5.1. Basic Operation

The LEM-1 master intercom allows for two-way audio communication with a connected door station or sub-master station.

• To Initiate a Call: Press the CALL button to signal the connected station.
• To Speak: Once a connection is established or a call is received, press and hold the TALK button to speak. Release the button to listen.
• To End a Call: Press the OFF button to terminate the communication.

5.2. Key Features

• Listening Feature: The master intercom operator can activate a listening feature to receive audio transmission from a connected door or sub-master intercom at any time, even without an active call. Consult the specific wiring diagram for this feature's activation.
• Adjustable Audio Volume: The unit features an adjustable audio volume control to set the desired listening level. This control is typically located on the side or back of the unit.

6. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your Aiphone LEM-1 intercom.

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners, solvents, or strong detergents, as these can damage the plastic finish.
• Avoid Moisture: Keep the unit dry and away from sources of moisture.
• Ventilation: Ensure the speaker grille is free from dust and debris to maintain clear audio.

7. Troubleshooting

If you experience issues with your Aiphone LEM-1 intercom, try the following basic troubleshooting steps:

• No Audio / Weak Audio:
  • Check the volume control on the LEM-1 unit and ensure it is set to an audible level.
  • Verify that the power supply is correctly connected and providing 6V AC.
  • Inspect all wiring connections for looseness or damage. Ensure the 2-conductor wire is properly connected at both the master and connected stations.
• Static or Distortion:
  • Check for any interference from other electronic devices nearby.
  • Ensure wiring is not running parallel to high-voltage lines.
  • Verify wire integrity; damaged insulation can cause static.
• Unit Not Responding:
  • Confirm the unit is receiving power.
  • If the issue persists after checking these points, contact Aiphone customer support or a qualified technician.

8. Specifications

9. Warranty and Support

For information regarding warranty coverage, technical support, or service, please contact Aiphone Communications directly. Keep your purchase receipt and model number (LEM-1) available when contacting support.

Aiphone provides comprehensive support for its products to ensure customer satisfaction and system reliability.