Troubleshooting The Lights - Generac Power Systems MLT4200IF4 Owner's Manual

Troubleshooting

Troubleshooting the Lights

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.
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
Mast Lights Off,
Checking Outside the
Control Box
Mast Lights Off,
Checking Inside the
Control Box
Mast Lights On But the
Light Output is Low
One or more lights do
not turn on
38
(000278)
(000187)
Possible Cause
Light fixture is too hot.
Faulty lamp connection.
Lamp broken.
Loose lighting
connections.
Damaged or loose
electrical cord.
Loose lighting
connections.
Generator output
incorrect.
Low transformer output.
Fixture and/or lens is
dirty.
Lamp worn due to
normal use.
Damaged or loose
electrical connections.
Generator output
incorrect.
Low transformer output.
Light breaker tripped.
Lights not turned on.
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.
Allow light to cool 10-15 minutes before restarting.
Check that the lamp is tight in the socket.
Check for broken arc tube or outer lamp jacket, broken or loose
components in lamp envelope, or blackening/deposits inside tube.
Check the connections inside the mast junction box and each mast light
housing/socket.
Check the mast electrical cord for damage and check the cord connections
inside the control box.
Check the connections inside the control box and inside each ballast box.
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.
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.
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.
Replace lamp.
Check the mast coil cord, mast junction box and mast light connections.
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.
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.
Check light breakers.
Check electronic control to see if lights are on.
Turn lights on.
Solution
Owner's Manual for MLT4200IF4 Light Tower