Troubleshooting
38
Owner’s Manual for MLT4200IF4 Light Tower
Troubleshooting the Lights
IMPORTANT NOTE:
Only a qualified electrician should
troubleshoot or repair electrical problems occurring in this
equipment. Contact Generac Mobile Products Technical
Service at 1-800-926-9768 for assistance if you have any
questions, or if problems persist.
(000278)
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.
(000187)
WARNING
Electrocution. Potentially lethal voltages are generated
by this equipment. Render the equipment safe before
attempting repairs or maintenance. Failure to do so
could result in death or serious injury.
Problem
Possible Cause
Solution
Mast Lights Off,
Checking Outside the
Control Box
Light fixture is too hot.
Allow light to cool 10-15 minutes before restarting.
Faulty lamp connection.
Check that the lamp is tight in the socket.
Lamp broken.
Check for broken arc tube or outer lamp jacket, broken or loose
components in lamp envelope, or blackening/deposits inside tube.
Loose lighting
connections.
Check the connections inside the mast junction box and each mast light
housing/socket.
Damaged or loose
electrical cord.
Check the mast electrical cord for damage and check the cord connections
inside the control box.
Mast Lights Off,
Checking Inside the
Control Box
Loose lighting
connections.
Check the connections inside the control box and inside each ballast box.
Generator output
incorrect.
Check the incoming voltage to the ballast by checking the available voltage
on the GFCI receptacle. Incoming voltage should be 120V +/- 5V. If voltage
is incorrect, the engine speed may need to be adjusted or generator may
require service.
Low transformer output.
The voltage from the transformer should read approximately 400VAC as
the light “strikes” (induces an arc), then drop and slowly rise back up to
stabilize at 240-260VAC. On hard wired models, remove the mast junction
box cover and insert the wire probes into the connector blocks for the light
and ground. If proper voltage is not achieved, perform capacitor check to
determine if the capacitor or coil needs to be replaced.
Mast Lights On But the
Light Output is Low
Fixture and/or lens is
dirty.
Clean reflective surface inside fixture and both inside and outside surface
of glass lens. Use mild soap and water to clean lens. Other chemicals may
have an adverse effect on the glass.
Lamp worn due to
normal use.
Replace lamp.
Damaged or loose
electrical connections.
Check the mast coil cord, mast junction box and mast light connections.
Generator output
incorrect.
Check the incoming voltage to the ballast. Incoming voltage should be
120V +/-5V. If the voltage is incorrect, the engine speed may need to be
adjusted or the generator may require service.
Low transformer output.
The voltage from the transformer should read approximately 400VAC as the
light “strikes” (induces an arc), then drop and slowly rise back up to stabilize
at 240-260VAC. On hard wired models, remove the mast junction box cover
and insert the wire probes into the connector blocks for the light and ground.
If proper voltage is not achieved, perform capacitor check to determine if the
capacitor or coil needs to be replaced.
One or more lights do
not turn on
Light breaker tripped.
Check light breakers.
Lights not turned on.
Check electronic control to see if lights are on.
Turn lights on.
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