Magnum MMG25FHZ Manual do Operador descarregar pdf (Página 18)

alarm or code at the bottom of the screen. The controller stores up to 118 codes. When full, the controller

will automatically remove the oldest file. These codes will not be lost when the control power toggle switch

is powered off.

FINE VOLTAGE ADJUSTMENT

Upon start-up of the generator, the “Running” screen of the Magnum Digital Controller (MDC) will display “SENSING”

and will countdown from 45 seconds to “0” Zero. This is a safety feature of the

controller to protect the generator from over or under voltage upon start-up.

“SENSING” is a 45 second time delay and count down process before the MDC

records the generator nominal output voltage. This nominal generator voltage

is then compared to the current set point voltage of the voltage selector switch.

If the nominal voltage recorded by the controller is greater than or lower than

the current set point voltage of the voltage selector switch setting by 10% or

more, the controller will shut the generator down automatically. The display will

read: Wrn VG1 or 2 or 3 Under/Over and/or Sd Vg1 or 2 or 3 Under/Over. This

means the controller warned (“Wrn”) or even shut down (“Sd”) the unit due to

an output voltage irregularity.

The output voltage of the generator may be adjusted after the generator is running by use of the fine voltage adjustment

screw. The adjusting screw is located directly below the control On/Off toggle switch on the control panel. This screw

turns a rheostat that will provide an increase (“+”) or a decrease (“-”) in the generator output voltage as displayed

on the Power Display Screen on the control panel. When making this adjustment, if the voltage is increased or

decreased too fast or too slow, the unit will automatically shut down. This adjustment needs to be made within the

45 second delay and countdown to “0” Zero period.

To adjust the output voltage, check the output voltage on the Liquid Crystal Display (LCD) window labeled Gen freq

& Hz. Look at the L1N voltage or the L12 voltage on the display. The generator nominal output voltage should be

within 10% of the voltage rating on the voltage selector switch.

To adjust the output voltage loosen the lock nut at the base of the screw and turn the screw in the desired direction

until the required voltage shown on the LCD window matches the stated voltage on the voltage selector switch.

For Example: With the voltage selector switch set to “208/120V” 3 Phase position, the voltage displayed on

the Gen freq & Hz screen must be within ± 10% of the 208/120 position (188-228 V Line to

Line / 108-132 V Line to Neutral).

If the voltage is not set within 10% of the applied voltage or the voltage is not reset within

the 45 second delay period, the generator will shut down automatically and the display will

read Wn VG1 or 2 or 3 Under/Over and/or Sd Vg1 or 2 or 3 Under/Over.

Note: Each time the voltage selector switch is changed from one setting to another, an adjustment will need to be

made to the fine voltage using this adjustment screw.

CONTROL

OFF

VOLTAGE

ADJUSTMENT

RHEOSTAT

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Magnum MMG25FHZ Manual do Operador Página 18