DALI Knowledge Base
Real, anonymized DALI field problems and the answers from our engineers. Searchable, categorized, growing.
Commissioning & Scanning
- Commissioning & Scanning
Why does my DALI tester show a 'bus traffic' error and refuse to scan, and can I test the line without disconnecting the gateway?
A "bus traffic" message during a scan is usually normal, not a fault.
Read answer - Commissioning & Scanning
How do I make individual DALI luminaires blink to identify them?
After a successful scan, ProbitSite can make luminaires blink so you can match each DALI address to the physical fitting.
Read answer - Commissioning & Scanning
I installed all my DALI devices but nothing happens, how do I get control of my lights?
Start at the basics.
Read answer - Commissioning & Scanning
Not all my DALI devices are found during commissioning, but broadcast commands work, why?
If broadcast commands work but not every device is found, the controller often isn't recognising certain device classes, typically input devices such as sensors (Part 303) or pu...
Read answer - Commissioning & Scanning
Why does my DALI gateway report finding 64 devices during a scan when fewer luminaires are actually installed?
When a DALI gateway or controller reports finding exactly 64 devices (the maximum possible on a single DALI line) despite having significantly fewer physical luminaires installe...
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Signal & Communication
- Signal & Communication
I measure a DALI voltage but communication is unreliable, how do I fix it?
A correct voltage doesn't guarantee reliable communication.
Read answer - Signal & Communication
My DALI signal quality is poor (yellow or red), what are the causes and how do I fix it?
Yellow means communication is still possible but outside the preferred limits, investigate before it fails.
Read answer - Signal & Communication
Why do my DALI luminaires work individually but drop off the bus or become unreachable when adding more devices to the line?
When DALI devices work reliably in small numbers but become erratic or disappear from scans as you connect more fittings to the same line, the bus is suffering from excessive vo...
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Addressing & Configuration
- Addressing & Configuration
Why do I have duplicate DALI short addresses, and how do I fix them?
A duplicate short address means two or more devices carry the same address (0 to 63), so the controller can't tell them apart and control becomes unpredictable.
Read answer - Addressing & Configuration
How can I replace a luminaire in a DALI installation without a PC to assign the correct address?
Use ProbitSite's stand-alone configuration.
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