• Low air relay operates (if configured)
Reset: when airflow rises 0.02 m/sec above Low air level for
longer than the low air to warning air delay time, the Low air
alarm resets automatically
If configured:
• Airflow reading above high level (for example > 1.50 m/sec)
• Red Alarm LED Halo illuminated
• High Air displayed in the status window or main window if
Show Airflow is set to OFF.
• Audible alarm sounds - can be muted by pressing the Mute
pushbutton
• High air relay operates (when configured)
3.7.2 Audible alarm mute
When the audible alarm is muted via the Mute button, an icon ( ) displays.
The audible alarm can be permanently disabled by selecting Not Enabled in the Cal Config menu
(Setup Monitor > Configure > Cal Config Menu > Audible Alarm).
3.7.3 Pushbutton functions
The AFA4000/E has 3 programmable pushbuttons. The pushbutton icon is displayed on the
screen, above the relevant pushbutton. The pushbuttons are identified as Pushbutton I,
Pushbutton II and Pushbutton III.
Each Pushbutton has a Power Up Memory function. The Power Up Memory function sets the
pushbutton back to its last status, following a power fail cycle. For example, when the Fan is On
during a power failure, the AFA4000/E powers up with the Fan pushbutton set to On.
Each pushbutton has a PIN option selectable as PIN required for On, PIN required for Off or PIN
required for both On and Off. When a PIN option is enabled, a New PIN parameter appears,
allowing you to set a 4-digit PIN number.
When a PIN is enabled and the pushbutton is pressed, a Password screen displays. If the correct
PIN is entered the pushbutton action will be completed; if an incorrect PIN is entered the
pushbutton action will remain in its present condition.
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