E658130

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2.When two or more inverters are connected
The following example explains the causes and corrective actions for fault which may be
judged from the LED status of the CC-Link units (CCL003Z) of the inverters under the
condition that the SW, M/S and PRM LEDs of the master unit are off (the master unit setting is
proper) in the system configuration shown below:
PS:
Power
supply
LED Status
CCL003Z
Master Station 1 Station 2 Station 3
Cause Corrective Action
L.RUN ● L.RUN ● L.RUN ●
SD ● SD ● SD ●
RD ● RD ● RD ●
L.ERR ○ L.ERR ○ L.ERR ○
Normal
-
L.RUN ○ L.RUN ● L.RUN ●
SD ○ SD ● SD ●
RD ○ RD ● RD ●
TIME○
LINE○
or
TIME●
LINE○
L.ERR ○ L.ERR ○ L.ERR ○
Poor contact of the
CCL003Z with the
Inverter or the power
supply is not supplied.
Plug the CCL003Z
securely.
Check the connector.
L.RUN ● L.RUN ○ L.RUN ○
SD ● SD ＊ SD ＊
RD ● RD ＊ RD ＊
L.ERR ○ L.ERR ○ L.ERR ○
Since the L.RUN LEDs
of station 2 and later are
off, the communication
cable between the unit 1
and 2 is open or
disconnected from the
terminal block.
Referring to the LED
"on" condition, search
for an open point and
repair.
L.RUN ○ L.RUN ○ L.RUN ○
SD ＊ SD ＊ SD ＊
RD ＊ RD ＊ RD ＊
L.ERR ○ L.ERR ○ L.ERR ○
The communication
cable is shorted.
Among the three wires
of the communication
cable, search for
shorted wire and
repair.
L.RUN ○ L.RUN ○ L.RUN ○
SD ＊ SD ＊ SD ＊
RD ＊ RD ＊ RD ＊
TIME●
LINE●
or
TIME○
LINE●
L.ERR ＊ L.ERR ＊ L.ERR ＊
The communication
cable is wired improperly.
Check the wiring on
CCL003Z terminal
block and correct the
improper wiring point.
●:On, ○:OFF, ◎:Flicker, ＊: Any of on, flicker or off.

Master

CPU Unit

Station
1
Inverter
P
S
Station
2
Inverter
Station
3
Inverter