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exceeds normal operating temperature. Return the main
circuit breaker to the OFF position to reset the unit after
the cause of shutdown has been determined.
Light Operation
WARNING
Burn hazard. Never operate lights with a
damaged or missing lens cover. Lamps are
hot and pressurized while in use. Unprotected
lamps can shatter, causing severe injury.
1. Verify the unit is on and running smoothly.
2. See
Figure
3-8. Switch the main circuit breaker (A)
ON (I).
3. Switch the individual circuit breakers for the lights
(B) ON (I), one at a time.
NOTE: For flagger station use, only switch lights 1 and 2
on when off-road illumination is necessary.
4. The ballast indicator lights (C) will turn on and
continue to get brighter as the lights warm up, and
then remain on. This confirms power is coming
from the ballasts to the lights.
A
MAIN
BREAKER
240V
ON
ON
TURN
MAIN
BREAKER
OFF
120V
BREAKER
120V
Figure 3-8. Light Switches and Breaker
NOTE: If an indicator light does not turn on, see
Troubleshooting
or contact a Generac Mobile Products
Authorized Service Dealer.
NOTE: 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
ten minutes before they can be switched on again.
NOTE: The light tower uses four 1000W or 1050W
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.
Owner's Manual for MLT Light Tower
(000277)
B
C
BALLAST INDICATOR LIGHTS
I
I
I
I
ON
ON
ON
ON
O
O
O
O
MAST LIGHT SWITCHES
400W
400W
Flagger Station Switches
OFF
GLOW PLUG
GLOW
RUN
INDICATOR
PLUG
START
240V
DC
BREAKER
NEUTRAL BONDED TO FRAME
004548
WARNING
Burn hazard. Lamps become extremely hot
while in use. Allow 10–15 minutes for cooling
before handling or lowering mast. Touching a
hot lens or fixture can cause severe burns.
Receptacle Panel
See
Figure
3-9.The control panel is equipped with 120V
GFCI (A) and 240V twist-lock (B) receptacles for running
accessories or tools from the generator. Power is
supplied to the receptacles any time the engine is
running and the main circuit breaker is switched ON (I).
NOTE: Do not pull more than 1000W from each
receptacle when the lights are on. This will overload the
generator and cause the main circuit breaker to trip.
Should the breaker trip, switch off the lights, remove
some of the load to the receptacles and wait 10 minutes
for the bulbs to cool before turning them back on.
With all of the lights off, the full generator output may be
used with the 240V twist-lock receptacle.
BREAKER
A
120V
Figure 3-9. Receptacle Panel
Engine Derating
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
(3-5ºC) increase in ambient air temperature over 72ºF
(22ºC).
Voltage Regulation (Optional)
Some units may be equipped with an electronic voltage
regulator. This voltage regulator controls the output of the
generator by regulating the current into the exciter field.
The voltage regulator on your unit is adjusted before
Operation
(000278)
BREAKER
B
240V
BREAKER
I
O
240V
NEUTRAL BONDED TO FRAME
004478
15
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Table of Contents
Troubleshooting
