E.OP1 to E.OP3
Communication option fault
The inverter trips if a communication line error occurs in the communication option.
When the FR-A8APR is installed to the inverter and a motor with a resolver is used, the
inverter trips if the FR-A8APR fails or the wiring of the resolver is not properly connected.
Check for an incorrect option function setting and operation.
Check that the plug-in option is plugged into the connector properly.
Check for a break in the communication cable.
Check that the terminating resistor is fitted properly.
Check that the wiring of the resolver is correct. (When the FR-A8APR is used)
Check the option function setting, etc.
Connect the plug-in option securely.
Check the connection of communication cable.
Check the wiring of the resolver. (When the FR-A8APR is used)
If the fault occurs again when the inverter is reset, contact your sales representative.
E.16 to E.20
User definition error by the PLC function
The protective function is activated by setting "16 to 20" in the special register SD1214 for the
PLC function. The inverter trips when the protective function is activated.
The protective function is activated when the PLC function is enabled. This protective function is
not available in the initial setting (Pr. 414 = "0").
Any character string can be displayed on FR-LU08 or FR-PU07 by sequence programs.
Check if "16 to 20" is set in the special register SD1214.
Set a value other than "16 to 20" in the special register SD1214.
Parameter storage device fault (control circuit board)
The inverter trips if a fault occurs in the parameter stored. (EEPROM failure)
Check for too many numbers of parameter write times.
Please contact your sales representative.
Set "1" in Pr. 342 "Communication EEPROM write selection" (write to RAM) for the operation
which requires frequent parameter writing via communication, etc. Note that writing to RAM
goes back to the initial status at power OFF.
Causes and corrective actions
Option1 Fault to
Fault 16 to Fault 20
6 - 27