Mitsubishi Electric FR-F720-55K Instruction Manual page 41

(2) Measures at fault occurrences
Fault Indication
E.OP1, E.OP2, E.OP3
E.OPT
E.1, E.2, E.3
* When faults other than the above are displayed, refer to the inverter manual and remove the cause of the fault.
Fault Definition
· Check that a cable is not disconnected from the communication
Communication connector.
option fault · Check that a cable between own node and other nodes (including
switching hub) is not disconnected.
Check the node address setting. (Refer to page 16)
If an option board becomes faulty, contact your sales representative.
· Mount the communication option to the lowest option connector.
(Refer to page 14)
Option fault
· Mount a communication option to the inverter compatible with the
FR-A7NF. (Refer to page 3)
· Check the connection between the inverter and option unit for poor
contact, etc. and remove the cause of the error. (Refer to page 14)
INVERTER SETTING
Measures
4
35