Basic Maintenance Schedule - Kubota Engine; Winch Use, Operation And Maintenance - Manual; Prior To Use; Operation - Generac Mobile Products MLT6SK Operating Manual

TROUBLESHOOTING THE LIGHTS

THIS UNIT USES HIGH VOLTAGE CIRCUITS CAPABLE OF CAUSING SERIOUS
INJURY OR DEATH. ONLY A QUALIFIED ELECTRICIAN SHOULD TROUBLESHOOT
OR REPAIR ELECTRICAL PROBLEMS OCCURRING IN THIS EQUIPMENT.

Mast Lights Off, Checking Outside the Control Box

1. Mast light is too hot. Allow light to cool 10-15 minutes before restarting.
2. Faulty bulb connection. Check that the bulb is tight in the socket.
3. Bulb broken. Check for broken arc tube or outer bulb jacket, broken or loose components in bulb envelope
or blackening/deposits inside tube.
4. Check the connections inside the mast junction box and each mast light housing/socket.
5. Check the mast electrical cord for damage and check the cord connections inside the control box.

Mast Lights Off, Checking Inside the Control Box

1. Check the connections inside the control box and inside each ballast box.
2. 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.
3. 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 quick discon-
nect models, measure across the junction box terminals when the light is unplugged. 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

1. 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.
2. Bulb worn due to normal use. Replace bulb.
3. Check the mast coil cord, mast junction box and mast light connections.
4. 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 ser-
vice.
5. 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 quick discon-
nect models, measure across the junction box terminals when the light is unplugged. 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.
If problems persist, contact Generac Mobile Products Technical Service at 1-800-926-9768 for assistance.
17973 G

Section 5 - Troubleshooting

MLT6SM/K-8SK Operating Manual
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