Lights Do Not Illuminate-Flowchart 1B - WACKER Group LTC 4 Repair Manual

Electrical Troubleshooting Procedures
7.9 Lights do not Illuminate—Flowchart 1B
Checking outgoing voltage from
main circuit breaker
With lights disconnected at quick-
disconnects, check outgoing
voltage from main circuit breaker.
Is
230V±10%
measured?
No
Replace main
circuit breaker.
Checking outgoing voltage from
control panel capacitor(s)
With lights disconnected at quick-
disconnects, check outgoing voltage
from control panel capacitors.
Is
400V±10%
measured?
Yes
Check voltage at quick disconnects.
If
400V±10% is not measured, c
continuity of the wiring beween the
quick disconnects and the control
panel capacitor(s).
If
400V±10% is measured, c
continuity of the wiring beween the
quick disconnects and the light
fixtures.
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Yes
Repair/replace
wiring between main
circuit breaker, terminal
strip, and individual
circuit breakers.
Replace
the individual
circuit breaker(s).
Replace
No
capacitor(s).
heck
heck
94
Checking individual circuit breaker(s)
With lights disconnected at quick-disconnects,
measure incoming and outgoing voltage to/
from individual circuit breaker(s).
Is
No
120V±10%
measured?
Yes
Is
No
120V±10%
measured?
Yes
Checking incoming voltage to control panel
capacitor(s)
With lights disconnected at quick-disconnects,
check for 400V±10% from ballast(s) to control
panel capacitor(s).
Is
400V±10%
Yes
measured?
No
Checking wiring to/from ballast(s)
Check the purple wires running to
and the red wires running from the
ballast(s). If the wires running to the
ballast(s) are OK, there should be
voltage (120±10%) to the ballast(s).
If there is power to the ballast but no
outgoing voltage (400±10%) from
the ballast(s), the ballast(s) are
malfunctioning; replace the ballast(s).
LTC Repair
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