How To Check For Error Using The Leds - Mitsubishi FR-A7NC Instruction Manual

9

HOW TO CHECK FOR ERROR USING THE LEDS

9.1 When One Inverter Is Connected
The following example indicates the causes of faults which may be judged from the LED status of the
communication option (FR-A7NC) of the inverter under the condition that the SW, M/S and PRM LEDs of
the master unit are off (the master unit setting is correct) in the system configuration where one inverter is
connected:
Power CPU Master
supply
unit
Operation status
indication LED
SD L.RUN
RD L.ERR
SD L.RUN
RD L.ERR
RUN
Station 1
Inverter
FR-A7NC
RUN
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