After you have correctly connected the instrument to the power line, as mentioned above, you can proceed with the power up.
Power up
In the powering up, the Leds are scanned:
the 8 LED light up sequentially on the rear of the instrument (pow, run, stop, err, L1, L2, L3 and L4).
Self-diagnostics
After scanning of the leds, the device performs a series of diagnostic operations.
When the anomalies are detected or when is need to notify at the operator a particular situation, the autodiagnosis operation is momentarily interrupted, and the device pointing out the alarm.
Any malfunction is stand out from the L1, L2 leds and a display message.
If the device is working properly, at the end of the stages of switching on self-diagnostics, you may encounter the following situations:
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led pow in ON (CPU in RESET state)
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led pow and run in ON (CPU in RUN state)
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led pow in ON and the run in flashing(CPU in READY state)