Light Operation; Voltage Regulation; Derating For Altitude - Generac Power Systems MAGNUM MLT4200IF4V Operating Manual

Light tower
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LIGHT OPERATION

The lights are turned on and off using the L401 controller. To view the mast and light screens, press both ↑ and ↓
buttons simultaneously, the navigation menu is then displayed. Once entered, cycle to the mast and light section
and press the Auto button to enter.
NEVER operate the lights without the protective lens cover, or with a lens cover that
is cracked or damaged. The bulbs in the light fixtures produce high temperatures and
operate under pressure. A broken or missing lens cover could cause the bulbs to
1. Once the engine is up to temperature and running smoothly, switch the main circuit breaker to the ON (I) position.
2. Cycle through the mast and light screens until you find the screen that selects the light(s) to be turned on or off.
To turn the light(s) on, press and hold the ↑ button until the timer bar finishes. To turn the light(s) off, press and
hold the ↓ button until the timer bar finishes.
Turn Lights On or Off Individually
Note: The lights can be turned on or off individually or all together.
3. The lights require a warm up period of 5-15 minutes before they reach full output. If the lights are shut down,
they require a cool down period of approximately 10 minutes before they can be switched on again.
4. The light tower uses four 1000W bulbs. When checking or replacing the bulbs, wipe them with a clean cloth to
avoid leaving any grease, oil residue or fingerprints on the glass. Any residue can create a hot spot on the bulb,
causing premature bulb failure.
Bulbs become extremely hot when in use. Allow bulb fixture to cool 10-15 minutes before

VOLTAGE REGULATION

Units are equipped with an electronic voltage regulator. The voltage regulator controls the output of the generator
by regulating the current into the exciter field. The regulator has three screwdriver adjustable potentiometers that
may be adjusted for voltage, stability and voltage roll-off (U/F). The voltage regulator is adjusted before shipment
from the factory. Contact Magnum Power Products LLC for additional information before attempting to adjust the
voltage regulator.

DERATING FOR ALTITUDE

All units are subject to derating for altitude and temperature; this will reduce the available power for operating tools
and accessories connected to the receptacles. Typical reductions in performance are 2-4% for every 1000 ft (305
m) of elevation and 1% per 10ºF (5.6ºC) increase in ambient air temperature over 72ºF (22ºC).
26
WARNING
shatter, causing injury.
Turn Lights On or Off at Same Time
CAUTION
handling or lowering the mast.
00899

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