Overview
Honeywell Home SC9120LBLA Combo Smoke & CO Alarm w/10-Year Battery Backup is listed here in the fire and life safety category. For details, start with the manufacturer's own information.
Official information
FAQs
Why does my zone show trouble?
Most common: low battery, tamper open, out of range, or wrong sensor type for the panel receiver (5800 Series vs SiX wireless).
How do I replace a sensor?
Delete old zone in installer programming, enroll replacement using Learn mode, and test walk test at final location.
Will Total Connect 2.0 show this device?
When the panel has active interactive service, enrolled zones appear in the Total Connect 2.0 app with status matching the panel.
Where is official documentation?
- Resideo product page
- Spec Sheet: SC9120LBLA Smoke & CO Combo Alarm (English)
- More information on Ionization vs. Photoelectric Smoke Alarms (English)
- Spec Sheet: SC9120LBLA Smoke & CO Combo Alarm (French Canadian)
- More information on Ionization vs. Photoelectric Smoke Alarms (French)
Primary reference: 5800 smoke/CO install guide
How do I test after installation?
Use panel walk test, zone status, and (if monitored) central station test per dealer procedure.
Can I mix 5800 and SiX sensors?
SiX sensors require ProSeries or Lyric; 5800 needs a 5800 receiver transceiver hardware — they do not enroll on the standard 345 MHz receiver alone.