Rev 3.1 01/11/23 - 11 - Model 600 User Guide
3 Front Panel Display/Keypad Operation
The Quest Model 600 has a 2X16 character backlit LCD and five buttons for status review and
programming. Additionally, there are separate keys for lead switch and comfort mode operation. The
backlight is normally off but will turn on when any key is pressed. The backlight will turn off after a few
seconds of no keys being pressed. The first press of the keypad will turn on the backlight and tell the
Model 600 to be ready for additional key presses. All keypad operation described below is after you
press and release any key to enable the backlight.
Figure 8 - Model 600 Keypad
3.1 Run Mode
The display will show the controlling temperature reading, Which unit is the lead system and the HVAC
control mode on the top line. The second line will show any active alarm condition or the message “NO
ACTIVE ALARMS”. Press the up and down arrow keys to cycle through the various status screens to
obtain current readings for all defined sensors and functionality.
3.1.1 Additional displays:
Press the up and down arrow keys to cycle through the status screens to obtain current readings for all
defined sensors. The screens will show in the following order using the down arrow:
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