Operation; Prestart Checklist; Manually Starting The Unit - Generac Power Systems Magnum MMG75D Owner's Manual

Section 3 Operation

Prestart Checklist

Before starting the unit, all items in the prestart checklist
must be completed. This checklist applies to both manual
and remote starting of the unit.
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
• Verify all maintenance procedures are up to date.
For more information, see
and Basic Maintenance
• The unit must be level.
• Verify there is no water inside, on, or near the unit;
dry if needed.
• For grounding requirements, follow any local, state,
or National Electrical Code (NEC) guidelines.
• Verify the Control Power switch is OFF (O).
• Verify all circuit breakers are OFF (O).
• Inspect all electrical cords; repair or replace any
that are cut, worn, or bare.
•
Verify oil, coolant, and fuel levels are correct, per
the engine manufacturer manual.
• Verify battery connections are secure.
• Turn the battery disconnect switch ON, if equipped.
•
Check the engine fan belt tension and condition.
•
Check the engine fan belt guard.
•
Check the engine exhaust system for loose or
rusted components.
• Verify all covers are in place and secure.
• Verify all electrical connections at the connection
lugs, if equipped, are tight and wired correctly.
• Verify the voltage selector switch is set to the
desired voltage and locked.
• Verify the emergency stop switch is pulled out.
• Verify the radiator and surrounding shroud are
clear of debris.

Manually Starting the Unit

DANGER
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
All units equipped with the Power Zone™ controller will
initially start up in STOP mode. Use the following
procedure to start the generator in MANUAL mode:
Move the Control Power switch to ON (I).
1.
Owner's Manual for Generator
(000100a)
General Maintenance
Schedule.
(000103)
The LCD window will show the prestart diagnosis
2.
and the controller will load the unit management
software.
Image File Transer...
Figure 3-1. Prestart Screen
When the software is loaded, the Home screen will
3.
be displayed and the controller will be in STOP
mode as indicated at the top of the screen. Press
the AUTO/MANUAL Mode ( ) button to enter
MANUAL mode.
0.0 kW
80
70
60
GEN
50
40
+ -
V
30
20
10
0
Figure 3-1. Home Screen
NOTE: The controller can be started from any screen
when it is in MANUAL mode.
Pressing the green Engine Start (I) button on the
4.
controller will initiate the startup procedure and
start the engine, provided there are no engine
faults preventing the unit from starting.
NOTE: It may take a few seconds for the engine to run
smoothly and reach its governed operating speed. During
this time, the screen will show a voltage different from
that set with the voltage selector switch.
If the engine does not start after the first cranking
5.
attempt, the engine will pause for 15 seconds to
allow the starter to cool. The LCD window will show

Operation

82%
Stop Mode
Time to Empty
15 hr
100 110
3 PHASE
90
Volts
%
0
Amps
0
74
%
002804
Full
3/4
1/2
1/4
Empty
002805
15