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How to check for error using the LEDs
4.8.3
When two or more inverters are connected
The following table shows how the cause of a fault can be determined with the inverter's (FR-E700-NC) LED statuses
in the system configuration shown below.
(In this example, assume SW, M/S, PRM LEDs of the master module are OFF. (The master module is in normal
operation.))
Power
supply
LED Status
Master
Inverters (FR-E700-NC)
Module
Station1
RUN
RUN
L.RUN
L.RUN
SD
SD
RD
RD
L.ERR
L.ERR
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
RUN
RUN
L.RUN
L.RUN
SD
*
SD
RD
*
RD
L.ERR
*
L.ERR
76
CPU
Master
module
(FR-E700-NC)
Station2
Station3
RUN
L.RUN
SD
Normal
RD
L.ERR
RUN
L.RUN
CC-Link communication circuit in the
SD
inverter is faulty.
RD
L.ERR
L.RUN is OFF at the station 2 inverter and
RUN
the subsequent inverters. This indicates that
L.RUN
the CC-Link dedicated cable has a break
*
SD
*
between the inverters A and B, or the CC-
*
RD
*
Link communication connector has come off
L.ERR
from the inverter A or B.
RUN
L.RUN
*
SD
*
The CC-Link dedicated cable is shorted.
*
RD
*
L.ERR
RUN
L.RUN
The CC-Link dedicated cable is connected
*
SD
*
incorrectly.
*
RD
*
*
L.ERR
*
Station 1
Station 2
Inverter A
Inverter B
(FR-E700-NC)
Cause
: ON,
: OFF,
Station 3
Inverter C
(FR-E700-NC)
Corrective Action
——
Please contact your sales
representative.
Referring to the LED "ON" condition,
search for an open point and repair.
Identify the shorted wire out of the
three wires (blue, white, yellow) of the
CC-Link dedicated cable, and repair
the wire.
Check if the three wires (blue, white,
yellow) of the CC-Link dedicated cable
are correctly inserted to the one-touch
communication connector plug. If any
improper connection is found, correct
the connection. (Refer to page 51.)
: Flicker, *: Any of ON, flicker or OFF
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