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1. With the unit running, press the "Voltage Adjust" screen button.
Press the Enter "" button. The voltages displayed will begin to flash.
2.
Use the up and down directional arrows "▲", "▼" to adjust the voltage.
3.
Press the Enter "" button to confirm the new voltage. The voltages displayed will stop flashing.
VOLTAGE REGULATION
The electronic voltage regulator controls generator output by regulating the current into the exciter field. The regulator
has six screwdriver adjustable potentiometers that may be adjusted for U/F dip, under frequency protection (U/F),
droop, stabilty, voltage, and trim. The voltage regulator is adjusted before shipment from the factory. Contact Generac
Mobile Products LLC for additional information before attempting to adjust the voltage regulator.
Note: For units equipped with a Marathon DVR2000E+ digital voltage regulator, see the Marathon operating manual
provided with the unit.
MAIN CIRCUIT BREAKER
The main circuit breaker is located on the main control panel. When the breaker is "OFF/O", power is interrupted
between the customer connection lugs and the generator. Once the connections have been made to the connection
lugs and the generator has been started and allowed to reach normal operating temperature, the breaker may be
switched to "ON/I". Use the breaker handle extension supplied with this unit to apply additional leverage to the switch.
The main circuit breaker will be tripped, disconnecting power to the connection lugs if
any of the following items occur while the unit is running:
•
Overload of the generator circuits to the connection lugs (208/120V only)
•
The door covering the connection lugs is opened
•
If the emergency stop switch is activated
•
If the door to the reconnect box (shorting board) is removed
Verify problems that cause the main circuit breaker to trip are corrected before returning
the switch to "ON/I".
33797 C
Manual Mode
Voltage Adjust
- Press
, voltage will begin flashing
- Use
and
arrows to adjust voltage
- Press
to confirm new voltage. Numbers will stop flashing
GEN
480
+ -
V
277
Figure 3-4. Fine Voltage Adjustment
MMG330DI4-480DI4 Operating Manual
V
L-N Average
V
L-L Average
00396
Operation
On/I
On/I
Off/O
Off/O
00452
Figure 3-5. Main Circuit
Breaker
29
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