Dispositivo KNX non risponde ABB — Presence Sensor Not Detecting / False Triggers
At a glance
- Severity
- WARNING
- Domain
- LIGHTING_AUTOMATION
- Reference standard
- EN 15193 / IEC 62386 (DALI)
What it means
The presence sensor does not detect people moving in the area, lights do not turn on automatically. Or the sensor generates false activations without any actual presence, causing unwanted switch-ons and energy waste.
Probable causes
- PIR sensor with dirty or obstructed lens
- Sensor coverage angle not suitable for the room geometry
- Sensor sensitivity set too low (does not detect) or too high (false activations)
- Warm air currents from HVAC system triggering the PIR
- Sensor faulty or with outdated firmware
Full guided diagnosis in the app
The diagnostic tree for this fault has 7 guided steps with measurements, checks and resolutions. You'll find it in BASIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More ABB codes
- Bus KNX assente — KNX/DALI Bus Fault / Communication Error
- Dispositivo KNX non risponde — Zone Not Responding / Group Control Failure
- 2310 — Overcurrent Fault
- 2330 — Ground Fault
- 3210 — DC Bus Overvoltage Fault
- 3220 — DC Bus Undervoltage Fault
- 4310 — Drive Overtemperature Fault
- 51 TRIP — LV Main Breaker Trip