Mitsubishi Electric 800 Series Instruction Manual page 102

LED status
Inverters (FR-A8NC)
Master
unit
Station 1 Station 2
RUN● RUN●
L.RUN● L.RUN●
SD● SD●
RD● RD●
L.ERR○ L.ERR●
RUN● RUN●
TIME● L.RUN● L.RUN●
LINE● SD● SD●
or RD● RD●
TIME○ L.ERR○ L.ERR●
LINE●
RUN● RUN●
L.RUN● L.RUN●
SD● SD●
RD● RD●
L.ERR○ L.ERR○

*: Any of on, flicker or off
●: On, ○: Off, : Flicker,
Station 3
RUN●
Since the L.ERR LED of the FR-A8NC on
L.RUN●
station 2 is on, the FR-A8NC itself on station 1
SD●
is affected by noise.
RD●
(L.RUN may go off.)
L.ERR○
RUN●
Since the L.ERR LEDs of the FR-A8NC on
L.RUN●
station 2 and later are on, the transmission
SD●
cable between the inverters of stations 2 and 3
RD●
is affected by noise. (L.RUN may go off.)
L.ERR●
RUN●
The terminating resistor has been left unfitted,
L.RUN●
or the one-touch connector plug with
SD●
terminating resistor has been left unfitted.
RD●
(L.RUN may go off.)
L.ERR●
HOW TO CHECK FOR ERROR USING THE LEDS
Cause
Securely earth (ground) each
inverter and the master module.
Check if shielding (drain) wires of
the CC-Link dedicated cable are
properly inserted to the CC-Link
communication one-touch
connector plug.
(Refer to
Also run it as far away as
possible from the power lines.
(100 mm or more)
• Check that the setting of the
terminating resistor selection
switch is correct. (Refer to
30)
• Use the one-touch connector
plug with terminating resistor.
(Refer to
Corrective action
page 21)
page
page 27)
101
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