Brand: COMELIT
Category: Intercom System
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for 8173I
Uploaded: April 20, 2026, 8:04 p.m.
Manual Publish Date: 2014-04-01
Warranty Information
Comelit Group S.p.A. provides a 24-month warranty for its products.
The Two-Family Door Entry Monitor Kits Art. 81731 are designed for residential and service buildings, offering effective access control and simple installation. The system operates on 2 wires for calls, audio, and video, plus 2 wires for 33V DC power to the external unit and electric lock. It supports a maximum of 2 external units with 3 internal units and allows for single-family intercom communications. A wide range of accessories is available for system expansion and customization.
Troubleshooting and error codes
| Issue | Possible Cause | Solution |
|---|---|---|
| Persistent short-circuit on the bus line | Internal fault | The external unit emits an intermittent signalling tone. |
| External unit doesn't emit a tone for a call | Privacy function enabled | Check if the Privacy function is enabled and disable it if necessary. |
| Busy tone instead of ringtone from external unit | Another communication is in progress. | In systems with 2 or more entrances, a busy tone indicates another external unit is in use. |