Controller Features And Functions - Generac Power Systems Magnum MMG75D Owner's Manual

Controller Features and Functions

Home Button
The Home ( ) button is the default screen of the
controller and will display after the controller is powered
up and the unit management software is loaded. It
displays a live readout of the kW meter, percent of load
used (gauge), selected phase, volts and amps being
produced by the generator, and the fuel level with time
until empty. The controller will automatically return to this
screen from any other screen after a period of inactivity.
106.9 kW
80
70
60
GEN
50
40
+ -
V
30
20
10
0
Figure 2-5. Home Button Screen
Engine Button
The Engine ( ) button displays the oil pressure,
coolant temperature and battery voltage on three main
gauges. Below the gauges is an hour gauge displaying
the total run time on the engine. At the bottom of the
screen, this screen also displays maintenance alarm
status with the time remaining (black text), or the time
past (red text) a scheduled maintenance task, along with
the description of the maintenance procedure and the
action that will take place when the timer trips the alarm.
40 60
20 80
0 100
GEN
50.9
PSI
Oil press.
+ -
V
0 0 3 2 5
Maintenance
Alarm Hours
1 174 To Service Oil Maintenance
2 174 To Service Fuel Maintenance
3 174 To Service Air Maintenance
Figure 2-6. Engine Button Screen
NOTE: If the measured value is outside the range of a
gauge, the needle will not be displayed. The digital value
below the gauge will still show the measured value.
• Oil Press: Displays engine oil pressure. Current
coolant temperature is displayed directly below the
Owner's Manual for Generator
Manual Mode
Time to Empty
15 hr
100 110
3 PHASE
90
Volts
%
480
Amps
128
74
%
Manual Mode
190 210 20 30
170 230 10
150 250 0
214 13.8
°F V
Coolant Temp. Battery
1 5
Hrs
Description Action
Warning
Shutdown
Electrical Trip
gauge at all times. The gauge registers oil pressure
between 0-100 psi (0-689 kPa). Normal operating
pressure is between 35-80 psi (241-552 kPa).
•
Coolant
temperature.
displayed directly below the gauge at all times. The
gauge displays coolant temperature between 150°-
250°F (66°-121°C). Normal operating temperature
of the unit is between 180°-200°F (82°-93°C) with
an average ambient air temperature of 70°F
(21°C).
• Battery: Displays the engine battery voltage.
Current battery voltage is displayed directly below
the gauge at all times. The gauge displays battery
voltage between 0-50V. A normal reading is 12-
14V on 12 volt systems and 24-26V on 24 volt
systems (with the engine running).
Full
Generator Button
3/4
The Generator (
voltage frequency, volts and amps from the generator, as
1/2
well as line-to-line voltage and individual line-to-neutral
1/4
voltage, amperage and power (kW). This screen also
displays the generator winding configuration set by the
Empty
voltage selector switch in the lower right corner.
002787
20
10
GEN
+ -
V
L1-L2
L2-L3
L3-L1
Figure 2-7. Generator Button Screen
NOTE: When loading the generator, it is important to
observe the amperage to determine the load balance on
each line of the generator. Minor load unbalances,
40
usually ten percent or less, will not cause any particular
problems. Every effort should be made to distribute the
50
load equally between all lines.
• Freq: Displays the output frequency in Hertz (Hz).
Normal operating frequency is 60 Hz.
•
Volts: Displays the nominal voltage in Volts (V).
•
Amps:
produced by the generator in Amps (A).
002788
Additional information can be found on the electric power
table at the bottom-left side of the screen. This provides
an overview of all three lines and average voltage and
amperage readouts.
Voltage Adjust Button
The Voltage Adjust (
neutral and line-to-line voltage averages. The operator
General Information
Temp: Displays
Current coolant
) button displays the average
GEN
Manual Mode
175
30 40
50
88 263
60
Volt
0 Freq 70 0 350
Parallel Low Zig-Zag
Volt Volt Amp kW
0 0.0
0 0
L1
0 0 25 0.0
L2
0 0 50 0.0
L3
0
IE
Displays the AC output
) button displays the line-to-
+ -
V
engine coolant
temperature is
25
13 38
Amp
0 50
L1 (U) N
L2 (W)
002789
amperage
9