1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Fermax FER9401 Veo 4.3-inch VDS Video Intercom Monitor. Please read this manual thoroughly before attempting installation or operation to ensure proper functionality and safety. Keep this manual for future reference.

Image 1.1: Front view of the Fermax FER9401 Veo 4.3-inch VDS Video Intercom Monitor, showing the handset, screen, and control buttons.
2. Safety Information
- Electrical Safety: Installation must be performed by qualified personnel in accordance with local electrical codes and regulations. Disconnect power before installation or maintenance.
- Handling: Handle the monitor with care to prevent damage. Avoid dropping or subjecting it to strong impacts.
- Environment: Do not expose the unit to extreme temperatures, humidity, or direct sunlight. Ensure proper ventilation.
- Modifications: Do not attempt to open or modify the unit. Unauthorized modifications can void the warranty and pose safety risks.
3. Package Contents
The Fermax FER9401 package typically includes:
- Fermax FER9401 Veo 4.3-inch VDS Video Intercom Monitor (1 unit)
Note: The connection support or mounting base is often sold separately and is required for installation. Please verify your purchase contents.
4. Product Overview
The Fermax FER9401 Veo monitor is a 4.3-inch color video intercom unit designed for VDS systems. It features a handset for audio communication, a screen for video display, and intuitive buttons for various functions.
4.1. Components and Controls

Image 4.1: Angled view highlighting the monitor's main components.
- Handset: For private audio communication.
- 4.3-inch Color Screen: Displays video from the outdoor panel camera.
- F1 Button: Programmable function button (e.g., auxiliary function).
- F2 Button: Programmable function button (e.g., auxiliary function).
- Camera Button: Activates the outdoor panel camera to view the exterior.
- Key Button: Activates the door release mechanism.

Image 4.2: Side view showing adjustment controls.
- Brightness Control: Adjusts screen brightness.
- Volume Control: Adjusts call volume.
5. Setup and Installation
The Fermax FER9401 monitor is designed for wall mounting. Professional installation is highly recommended due to the electrical wiring and system configuration requirements.
5.1. Pre-Installation Checks
- Ensure all power to the intercom system is disconnected at the main breaker.
- Verify that you have the correct mounting base/connection support, as it is typically not included with the monitor.
- Confirm compatibility with your existing VDS system. This monitor may not be compatible with older systems like Fermax 3311 without system upgrades.
5.2. Mounting the Monitor
- Secure the mounting base (sold separately) to the wall using appropriate screws and anchors. Ensure it is level and at a suitable height.
- Route the necessary VDS wiring through the opening in the mounting base.
5.3. Wiring Connections

Image 5.1: Back view of the monitor, illustrating the wiring terminals.
Connect the VDS system wires to the terminals on the back of the monitor or the mounting base. Refer to the wiring diagram provided with your VDS system or mounting base for specific connections. Common connections include:
- L, +: Power supply connections.
- V, D: Video and data lines for VDS communication.
- C, F1, F2: Auxiliary function connections (if applicable).
Important: Ensure all connections are secure and correctly polarized to prevent damage to the unit or system.
5.4. Attaching the Monitor
Once wiring is complete, carefully align the monitor with the mounting base and press it firmly into place until it clicks securely. Ensure the handset cable is properly connected.
5.5. System Synchronization/Programming
After physical installation, the monitor may need to be synchronized with the outdoor call panel. This typically involves a programming sequence initiated from the outdoor panel or a specific button combination on the monitor. Consult your VDS system's main unit manual for detailed programming instructions.

Image 5.2: The monitor installed and operational, showing a live video feed.
6. Operating Instructions
6.1. Receiving a Call
When someone presses the call button on the outdoor panel, the monitor will ring. Lift the handset to answer the call and establish two-way audio communication.
6.2. Viewing the Outdoor Panel
Press the Camera Button (icon resembling a camera) to activate the outdoor panel camera and view the exterior without an incoming call. The video feed will appear on the 4.3-inch screen.
6.3. Opening the Door
During a call or while viewing the outdoor panel, press the Key Button (icon resembling a key) to activate the door release mechanism. A confirmation sound may be heard.
6.4. Using Function Buttons (F1, F2)
The F1 and F2 buttons are programmable auxiliary function buttons. Their specific functions depend on your system's configuration (e.g., activating a second door, turning on an external light). Consult your system installer or main unit manual for assigned functions.
6.5. Adjusting Brightness and Volume
Use the rotary controls located on the side of the monitor to adjust the screen brightness and call volume to your preference.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the monitor's surface. For stubborn marks, slightly dampen the cloth with water. Do not use abrasive cleaners, solvents, or chemical sprays.
- Handset Cord: Periodically check the coiled handset cord for any signs of wear or damage.
- General Care: Ensure the monitor is not obstructed and maintains adequate ventilation.
8. Troubleshooting
If you encounter issues with your Fermax FER9401 monitor, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No image on screen. |
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| No sound during a call. |
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| Door release not working. |
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| Monitor is not compatible with my old system. |
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If the problem persists after attempting these solutions, please contact Fermax technical support or a qualified installer.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | FER9401 |
| Screen Size | 4.3 inches |
| System Type | VDS (Video Door System) |
| Color | White |
| Material | ABS Plastic |
| Dimensions (L x W x H) | 20 cm x 20 cm x 4.4 cm (7.87 in x 7.87 in x 1.73 in) |
| Weight | 207 grams (0.46 lbs) |
| Mounting Type | Wall Mount |
| Connectivity Technology | Wired (VDS), Bluetooth (for potential future features or specific system configurations) |
| Power Source | Electric Cable |
| Input Voltage | 100 Volts |
| Special Features | Integrated Microphone |
10. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. Fermax offers technical support for their products. For assistance, please visit the official Fermax website or contact their customer service department.
Fermax Official Website: www.fermax.com





