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6-7
Troubleshooting (continued)
Control Board Indicator Light
These LEDs are mainly used in the labs and for engineering evaluations. However, the
technician should consider a blinking red light as something not properly working inside the
system. The green light always blinks whenever power is supplied to the power control board.
You can also see the 240 VAC + connection with insulated terminal connections --- the top of
the insulator is open in this picture.
Green
240VAC connection with top
of insulator open
Red