Your BTicino or Tegui video intercom isn’t working as expected — no sound, no image, or the doorbell simply doesn’t ring. Before calling a technician, work through this step-by-step troubleshooting guide. Most common issues can be diagnosed and resolved without specialist tools.
Step 1: Identify the symptom
The first step is to pinpoint exactly what isn’t working. This will help you focus on the right area:
| Symptom | Most likely cause |
|---|---|
| No image on monitor | Power supply, wiring, camera or monitor fault |
| No sound / doorbell not ringing | Volume setting, jumper configuration, call button fault |
| No image AND no sound | Power supply failure or wiring break |
| Intermittent issues | Loose connection, insufficient power supply |
| Works locally but not on smartphone | WiFi connectivity or app configuration issue |
Step 2: Check the power supply
A faulty or undersized power supply is the most common cause of video intercom problems. Before checking anything else:
- Use a multimeter to measure the voltage at the monitor terminals. It should match the specification in your model’s manual.
- Check that the BTicino/Tegui power supply unit (e.g. Ref. 346050) is functioning correctly.
- If you have multiple monitors or accessories connected, verify that the total load does not exceed the power supply’s maximum capacity.
- Try disconnecting all devices except one monitor and the outdoor panel to isolate the issue.
Step 3: Inspect the wiring
In 2-wire BUS SCS systems, all signals (video, audio, power and call) travel over the same two wires. A wiring issue can affect one or all functions:
- Check that all wires are firmly connected at both the monitor and outdoor panel terminals.
- Look for damaged, pinched or corroded cables, especially at junction points.
- Verify the polarity of the 2-wire connection — reversed polarity can cause system malfunctions.
- For long cable runs (over 100m), signal degradation may require a signal amplifier.
Step 4: Check the jumper configuration (N, P, M)
BTicino and Tegui monitors use jumpers (N, P and M) to configure their operating mode within the system. Incorrect jumper settings are a frequent cause of missing ringtone, no image or communication failures.
- Refer to your monitor’s manual to identify the correct jumper values for your installation.
- If you have recently replaced a monitor, make sure the new monitor’s jumper settings match the previous one.
- After changing any jumper settings, always power cycle the system (disconnect power for 10 seconds, then reconnect).
Step 5: No image — specific checks
If the monitor has power but shows no image when the outdoor panel is activated:
- Test with a different monitor to determine whether the fault is in the monitor or the outdoor panel camera.
- Check the outdoor panel for physical damage, moisture ingress or oxidation on the terminals.
- On WiFi monitors (e.g. Classe 100X16E), check for firmware updates and perform a factory reset if necessary.
- Ensure the termination jumper is correctly set — only the last monitor on the line should have the video termination jumper active.
Step 6: No sound — specific checks
If the monitor shows image but produces no sound when someone calls:
- Check the ringtone volume in the monitor’s settings menu — it may have been set to zero or muted.
- Check whether “Do Not Disturb” mode is active on the monitor (available on WiFi models).
- Verify the M jumper setting — an incorrect M value can disable the ringtone.
- Test the outdoor panel call button with a multimeter to confirm it makes proper contact when pressed.
- If the monitor produces no sound at all (not even menu sounds), the internal speaker may be faulty and the monitor may need replacing.
Step 7: WiFi and app issues
If your BTicino/Tegui WiFi monitor works locally but you’re not receiving calls on your smartphone:
- Verify the monitor is connected to your WiFi network (check the WiFi icon on the monitor screen).
- Check the WiFi signal strength at the monitor’s location — a weak signal can cause intermittent connectivity.
- Make sure push notifications are enabled for the BTicino app in your smartphone’s settings.
- Restart both the router and the monitor.
- Check that the BTicino app is up to date on your device.
Quick diagnostic checklist
- Check power supply voltage at monitor terminals.
- Inspect all wiring connections for loose or damaged cables.
- Verify jumper N, P and M settings.
- Test with a second monitor to isolate the fault.
- Check the outdoor panel call button and camera.
- Review monitor volume and Do Not Disturb settings.
- For WiFi issues: check network connection and app notifications.
Frequently asked questions
Why does my BTicino intercom work sometimes but not others?
Intermittent faults are usually caused by an unstable power supply, a loose wiring connection, or a worn call button on the outdoor panel. Start by checking all terminal connections and measuring the supply voltage under load.
Can I reset my BTicino monitor to factory settings?
Yes. Most BTicino and Tegui monitors support a factory reset via the settings menu. Refer to your model’s manual for the specific procedure. Note that a factory reset will clear all custom settings including WiFi configuration.
My BTicino monitor shows image but I can’t hear the visitor — what’s wrong?
This is typically a volume or speaker issue. First check the call volume in the monitor settings. If the volume is set correctly and there is still no audio, the internal speaker or the audio circuit may be faulty.
Do I need to replace the whole system or just the monitor?
In most cases, only the faulty component needs replacing. BTicino and Tegui monitors are designed to be individually replaceable without changing the wiring or outdoor panel, provided the replacement model is compatible with your system type.
Need a replacement BTicino or Tegui monitor?
If your monitor needs replacing after following this guide, our store carries a full range of original BTicino and Tegui monitors compatible with both 2-wire and 4+N installations, with fast shipping across Europe.
