: Equipped with an LED digital display that shows real-time gas concentration levels (0–9 and 'A').

If an error is not listed in the manual, look for a “Diagnostic Mode” described in Chapter 8. This allows you to view raw ADC counts for inputs and manually toggle outputs.

Displays power status (Solid = Ready; Flashing = Warming up/Error).

The manual recommends starting with LD if you have no prior experience.

Display shows numbers 1-9 or "A" based on concentration; ALARM light flashes; siren sounds. Maintenance and Safety Precautions