WACKER Group LTC 4 - Lights do not Illuminate-Flowchart 1 B

Electrical Troubleshooting Procedures LTC Repair
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7.9 Lights do not Illuminate—Flowchart 1B
Is
400V±10%
measured?
Ye s
Checking outgoing voltage from
control panel capacitor(s)
With lights disconnected at quick-
disconnects, check outgoing voltage
from control panel capacitors.
Ye s
No
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).
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).
Checking individual circuit breaker(s)
With lights disconnected at quick-disconnects,
measure incoming and outgoing voltage to/
from individual circuit breaker(s).
Check voltage at quick disconnects.
If
400V±10% is not measured, check
continuity of the wiring beween the
quick disconnects and the control
panel capacitor(s).
If
400V±10% is measured, check
continuity of the wiring beween the
quick disconnects and the light
fixtures.
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Checking outgoing voltage from
main circuit breaker
With lights disconnected at quick-
disconnects, check outgoing
voltage from main circuit breaker.
No
Ye s
No
Replace main
circuit breaker.
Replace
capacitor(s).
Is
230V±10%
measured?
No
Ye s
Repair/replace
wiring between main
circuit breaker, terminal
strip, and individual
circuit breakers.
Is
120V±10%
measured?
No
Ye s
Replace
the individual
circuit breaker(s).
Is
120V±10%
measured?
Is
400V±10%
measured?