3-22
V
ARI
*L
ITE
®
-
VL4
W
ASH
L
UMINAIRE
S
ERVICE
M
ANUAL
CONFIDENTIAL 02.9628.0010
7-Oct-97
Luminaire Fault Isolation Chart (continued)
Assuming that all other system components are working properly and that
proper system power has been supplied to the luminaire:
Symptom Probable Cause Corrective Action
Magenta filters not working
properly
Loose connection at YTB
Bad UCB
Bad worm or spur gear
Incorrect washer/spacer stacking
Bad motor
Broken glass
Bad sensor
Bad yoke termination board
para. 3.2.2.9
Amber filters not working properly Loose connection at YTB
Bad UCB
Bad worm or spur gear
Bad motor
Broken glass
Bad sensor
Gears/carriers not “free floating” in
bushings
Bad yoke termination board
para. 3.2.2.10
Blue filters not working properly Loose connection at YTB
Bad UCB
Bad worm or spur gear
Bad motor
Broken glass
Broken drive shaft
Bad yoke termination board
para. 3.2.2.11
Improper tilt response MTA connector unplugged at
MBD
Bad tilt mechanism
Bad UCB
Bad LVS
Bad yoke cable
para. 3.2.2.12
Improper pan response Bad UCB
Bad LVS
Loose/broken belt
MTA connector unplugged at
MBD
Bad driven pulley
Bad motor
para. 3.2.2.13
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