User`s manual

7 TROUBLESHOOTING
35
The following table describes the failures, causes, and corrective actions that can be judged according to the LED of the
inverter CC-Link unit (SI-C unit) when the LED display of the master unit SW, M/S or PRM has been extinguished
(always set in the master unit), in the system configuration shown below.
LED Display
Remote Device Station(SI-C)
Master
Unit
Station
No. 1
Station
No. 2
Station
No. 3
Cause Corrective Action
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The drive is operating
properly.
—
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The SI-C card of station No.
1 is not attached correctly.
Check how it is attached
and reattach it correctly if
necessary.
L.RUN
SD
RD
L.ERR
∗
∗
∗
∗
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The SI-C card of station No.
1 is defective. (Usually all
indicator lamps are
extinguished.)
An error may be displayed
in the inverter.
Replace the SI-C card.
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
∗
∗
L.RUN
SD
RD
L.ERR
∗
∗
L.RUN of station No. 2 and
other LEDs after it are
extinguished. The
transmission cable is
disconnected between
station No. 1 and 2 or is
removed from the terminal
block.
Refer to the LED lighting
status to look for the
disconnected part and then
correct it.
L.RUN
SD
RD
L.ERR
∗
∗
L.RUN
SD
RD
L.ERR
∗
∗
L.RUN
SD
RD
L.ERR
∗
∗
Transmission cable
shortcircuits.
Find the shortcircuiting
cable among the three
communications cables and
correct it.
TIME
LINE

or
TIME

LINE

L.RUN
SD
RD
L.ERR
∗
∗
∗
L.RUN
SD
RD
L.ERR
∗
∗
∗
L.RUN
SD
RD
L.ERR
∗
∗
∗
Communications cable is
connected incorrectly.
Check the wiring in the
SI-C card's terminal block
and correct the incorrect
wiring.
Station
No. 1
Inverter
Master
Unit
Power
Station
No. 2
Inverter
Station
No. 3
Inverter
CPU
: Lit : Flashing  : Not lit ∗: Either lit or not lit