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section 6
6.1 General
warninG
caution
6.2 fault indicators
electric shock can kill!
do not permit untrained persons to inspect or repair this
equipment. electrical work must be performed by an expe-
rienced electrician.
stop work immediately if power source does not work properly.
have only trained personnel investigate the cause.
use only recommended replacement parts.
Front Panel Fault
Indicators
PCB1 Located behind
this panel.
Fault i ndicators a re f ound o n t he f ront p anel U sed w ith
the LEDs on PCB1 (located behind the cover with the
EPP label) problems can be diagnosed.
It is normal for momentary light-
ing (flashing) of the fault indicator
and LED 3 when a "contactor on"
signal is applied at the beginning
Fault Indicator used with:
LED 3 - Bus Ripple
LED 4 - High Bus
LED 5 - Low Bus
LED 7 - Arc Voltage Saturation
LED 8 - Arc Voltage Cutoff
Power Reset Fault Indicator used with:
LED 6 - Right Overcurrent
LED 9 - Left Overcurrent
LED 10 - Left IGBT Unsaturated
LED 11 - Right IGBT Unsaturated
LED 12 - Left -12V Bias Supply
LED 13 - Right -12V Bias Supply
37
troubleshootinG
note:
of each cut start.
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