If an alarm occurred in the inverter and the inverter and option unit do not function, refer to the following
check points, find the cause from the operation panel indication of the inverter and the LED status of the
option unit, and take an adequate action. If any of the causes does not apply to the alarm, a failure may
have occurred. In that case, contact your sales representative.
Red is lit
The error code of the inverter enters.
Make sure that the option is fitted properly.
Option unit does not
Reset the inverter.
Perform all parameter clear to return parameters to the initial
value, then power on the inverter again.
Make sure that the network cables between the nodes are
Make sure that the network cables are terminated.
Network is instable
Check the network setting from the Profibus-DP Network
Check the other nodes for a network error.
Master does not exist
in the network or does
Check the connection and operation of the Profibus-DP master.
not function properly.
Inverter in error
Refer to the inverter manual.