AFA4000/E VAV Airflow Controller / p.29
• Amber Alarm LED Halo illuminated
• Audible alarm sounds - can be muted by pressing the Mute
pushbutton
• Sash High relay operates (if configured)
• Input 2 or 3 set to Analogue – Volume Pressure
• Used to give volumetric output based on duct measurement using
restrictor device
• Input 2 or 3 set to Analogue – Damper Feedback
• Used for sash position control (AFA3000) model only
3.7.4.2 Digital input functions
When input configured as Alarm is disabled:
• Alarm disabled displays in the status window
• Red Alarm LED Halo illuminated
• Audible alarm muted
• Mute Icon shown on display
When input configured as Night Set-back is activated:
• Night Set-back displays in the status window
• Unit is driven to the VAV MIN operating position
• Audible alarm muted
• Mute Icon displays
• Low Air alarm muted if set to Maintain Low Air
• Reduce Low Air & Warning alarms active if set to Reduce Low Air
When input configured as External alarm is activated:
• Red Alarm LED Halo illuminated
• External Alarm toggles on / off in the status window (when
configured)
• Audible alarm sounds. Can be muted by pressing the Mute
pushbutton
• External Alarm relay operates (when configured)
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