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Appendix: Troubleshooting
Symptom
Lights go to full, but not all the
way to minimum.
Black lamp ends or premature
lamp failure.
Lights flicker or drop out at
Low End.
Lights are flashing or strobing.
Lamps are not at the same
light level.
Ballasts buzz or hum.
38
Installation Guide for Lighting Zone Controllers
(continued)
Possible Cause
• Ballasts not properly grounded.
• Wrong lamp type for the ballast
installed.
• Lamps are too old.
• Poor connections.
• Ballast to Socket wires too long.
• Lamps were not kept at full intensity
for 100 hours before dimming.
• Lamps are not properly seated in the
sockets.
• Lamps were not kept at full intensity
for 100 hours before dimming.
• Defective or damaged lamps.
• Lamps are too close to a grounded
surface.
• Low End too low in the Lighting
Zone Controller.
• Wrong lamp type or voltage for
ballast installed.
• System miswired.
• Ballast to socket wires different
lengths.
• Distance from the lamp to a
grounded surface is different.
• Mixture of lamp ages or
manufacturers.
• System miswired.
• Wrong lamp type for ballast
installed.
• Insecurely mounted ballast.
Solution
Check that the fixture is properly grounded and
that a ground plane is 1/2 in. +/- 1/4 in. (13 mm
+/- 6 mm) away from the lamp's entire length.
Verify ballast lamp type matches lamp.
Relamp the entire fixture.
Check for proper connection of wires to the
sockets and lamp pins to sockets.
Shorten the amount of wire between the ballast
and the sockets—max total length shall not
exceed 7 feet (2.1 m); 3 feet (1 m) for compact
fluorescent. This is especially critical on the
yellow and the blue/white wires since the length
of the wires between sockets is part of the total
length.
Relamp the entire fixture and leave them at full
intensity for 100 hours before dimming.
Check the wire, to socket, to lamp pin
connections.
Keep the lamps at full intensity for 100 hours.
Replace with new lamps or exchange lamps from
a known good fixture.
Check that the ground plane is 1/2 in. +/- 1/4 in.
(13 mm +/- 6 mm) away from the lamp's entire
length.
Check Low End voltage in Appendix: Voltage
Map, then reset Low End for this Lighting Zone
Controller using the Digital microWATT
eLumen
software.
TM
Verify the ballast's lamp type and voltage are
correct.
Check for Hot and Dimmed Hot swapped, or
Check for correct socket wiring.
Different lengths will cause imbalance (for instance,
3 ft. (0.9 m) of Red wires and 6 ft. (1.8 m) of
Blue wires will cause an imbalance). Add wire as
needed—but do not exceed 7 ft. (2.1 m) total
limit.
Check that the grounded metal is 1/2 in. +/- 1/4
in. (13 mm +/- 6 mm) away from the lamp's
entire length. All lamps in a fixture should have
the same distance in order to have the same
intensity.
Check that all the lamps are the same exact
type—both manufacturer and color.
Check for interchanged Hot, Dimmed Hot, and
Neutral wires.
Verify the ballast lamp type and voltage are
correct.
Tighten the mounting screws after checking for
foreign material behind the ballast.
This page applies to:
Small
Std.
Panel
Panel
LZC1
or
TM
R
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