TQ Environmental LTD
Product Manual TQ 4000
Filename: 7970H8 Page 21 of 27
5.2.2. Mute
When an alarm has occurred the BUZZER will activate and the
appropriate alarm LED’s will illuminate indicating the active alarms. The
user may de-activate the BUZZER by pressing the MUTE button. The
appropriate channel alarm LED’s will continuously flash to indicated
that they have been muted.
5.2.3. Hold
The user must press the HOLD button on the front panel when the
CHANNEL LED is indicating the desired channel. The CHANNEL LED will
continuously flash to indicate that the channel is held. To release the
hold function the user must keep the HOLD button pressed for a
minimum of two seconds. The TQ4000 will then resume normal
scanning of channels.
5.2.4. Lamp Test
To test the front panel LED’s are operational, the user may press the
LAMP TEST button, mounted on the rear of the door panel. This will
illuminate all front panel LED’s for the duration that the LAMP TEST
button is pressed. The front panel LED’s will revert to their previous
state when the LAMP TEST button is released.
5.2.5. Dimmer
The user may alter the brightness of the POWER LED and the LCD by
pressing and holding the DIMMER UP and DIMMER DOWN buttons
accordingly, these are mounted on the rear of the door panel.
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