Troubleshooting The Lights - Magnum MLT 4250 Operating & Parts Manual

TROUBLESHOOTING THE LIGHTS

HIGH VOLTAGE! THIS UNIT USES HIGH VOLTAGE CIRCUITS CAPABLE OF CAUSING SERIOUS
INJURY OR DEATH. ONLY A QUALIFIED ELECTRICIAN SHOULD TROUBLESHOOT OR REPAIR
MAST LIGHTS OFF BUT BALLAST INDICATORS ON CONTROL PANEL ARE ON:
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 AND BALLAST INDICATORS ON CONTROL PANEL ARE OFF:
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 duplex receptacle. Incoming voltage should be 120V +/- 5V. If voltage is incorrect engine speed
may need to be adjusted or generator may require service. Contact Magnum Products Technical
Service Department for more information.
3. Low transformer output. The voltage from the transformer should read approximately 400 VAC as the
light "strikes" (induces an arc), then drop and slowly rise back up to stabilize at 240-260 VAC. On quick
disconnect 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 lights 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 or lens dirty. Clean reflective surface inside fixture and both inside and outside surface of glass
lens.
2. Bulb worn. Replace bulb due to normal use.
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 voltage is incorrect engine speed may need to be adjusted or generator may require service.
5. Low transformer output. Perform transformer check as described above.
If problems persist, contact Magnum Products Technical Service for assistance.
ELECTRICAL PROBLEMS OCCURRING IN THIS EQUIPMENT.
2
4
MAST LIGHT CONNECTIONS
DANGER
1
3
37