136 • Using Maintenance Mode GX-2012 Operator’s Manual
3. Press and release the POWER ENTER button to save the setting and
return to the main menu.
Updating the Autozero Function
With AUTO.ZERO turned ON, the GX-2012 will automatically perform a
fresh air adjust when it is turned on. With the AUTO.ZERO function turned
OFF (factory setting), this does not occur.
WARNING: If you turn on the autozero function, you must ensure that
the unit is in a fresh air environment when it is turned on.
1. Use the AIRS or (SHIFT)T buttons to display the AUTO.ZERO menu
item. Press and release the POWER ENTER button. The screen will
indicate the current setting.
2. Use the AIRS or (SHIFT)T button to display the desired setting.
3. Press and release the POWER ENTER button to save the setting and
return to the main menu.
Updating the Demand Zero Function
The DEMAND Z function allows you to manually perform a fresh air adjust
in normal operation by pressing the AIRS button. The factory setting is ON.
1. Use the AIRS or (SHIFT)T buttons to display the DEMAND Z menu
item. Press and release the POWER ENTER button. The screen will
indicate the current setting.
2. Use the AIRS or (SHIFT)T button to display the desired setting.
3. Press and release the POWER ENTER button to save the setting and
OFF
MAINTENANCE
AUTO.ZERO
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