Maintenance Screens - Generac Power Systems MAGNUM MMG75D Operating Manual

General Information
Auto/Manual Mode Button
The Auto/Manual Mode ( ) button is used to change the startup and shutdown modes of the unit. When pressed
once, the unit enters Manual mode and when pressed and held for five seconds, the unit enters Auto mode. If in
Auto mode, pressing once will return the unit to Manual mode.
Navigation Buttons
These buttons are used to navigate and interact with the Power Zone™ controller screens. Pressing any directional
arrow (▲, ►, ▼, ◄) while on any of the operator screens will open the maintenance screens, and navigate the tabs
and pages within the maintenance screens. The Enter () button is used to select menus, confirm alarms, and
confirm altered settings.
Control Power Switch
Use this switch to start up and shut down the Power Zone™ controller. This switch should not be turned off when
the unit is running.
Engine Start Button
Pressing the Engine Start (I) button while the controller is in Manual mode will start the unit, provided there are no
shutdown errors and the engine satisfies the start status. If the controller is in Auto mode, the Engine Start (I) button
has no effect.
Engine Stop/Reset Button
Pressing the Engine Stop/Reset (O) button will shut down the unit and put the controller into Stop mode, whether in
Manual mode or Auto mode.
CAUTION
In case of an emergency, always press the emergency stop switch located on the side of
the unit to stop the engine immediately. The Engine Stop/Reset (O) button may delay the
engine shutdown if stop faults exist.
To prevent damage to the generator and connected equipment, remove all loads from the
generator by opening all circuit breakers (turn OFF (O)) before pressing the Engine Stop/
Reset (O) button.
The Liquid Crystal Display (LCD)
This window will display the various operator and maintenance screens. By viewing these screens, the operator will
be able to monitor both the engine and generator status while the unit is running.

Maintenance Screens

All of the data inputs from the engine, generator, inputs/outputs, schedule and Power Zone™ controller are visible
on the maintenance screens.
The information displayed on the maintenance screens can be used to identify, diagnose and troubleshoot unit
shutdown conditions and poor unit performance. The maintenance screens can be accessed from any operator
screen by pressing any directional arrow (▲, ►, ▼, ◄).
The bottom of the screens have a list of available tabs, with the currently displayed tab highlighted in blue. The tabs
can be selected by using the ► or ◄ buttons. To the left of the tabs, the current/available pages are displayed. The
pages within a tab can be viewed by using the ▲ and ▼ buttons. Whenever a new tab is selected, the current page
will always be page one.
14 MMG75D-100D Operating Manual 33701 C