PROTECTIVE FUNCTIONS
170
Operation Panel Indication
E. OLT
FR-PU04
Stll Prev STP
Name
Stall prevention
Description
The running frequency has fallen to 0 by stall prevention
activated. (OL while stall prevention is being activated.)
Check point
Check the motor for use under overload.
Corrective action
Reduce the load weight.
Operation Panel Indication
E. OPT
FR-PU04
Option Fault
Name
Option alarm
Description
Stops the inverter output if the inverter station is
disconnected from the system in the NET mode. (Note 4)
Also stops the inverter output if the dedicated option used in
the inverter results in setting error or connection (connector)
fault.
Check point
Check that the plug-in option connector is plugged securely.
Corrective action
Connect the plug-in option securely.
Please contact your sales representative.
Note:4 Only when the FR-E5NC is fitted to the three-phase 400V power input model.
Operation Panel Indication
E. PE
FR-PU04
Corrupt Memory
Name
Parameter storage device alarm
Description
A fault occurred in parameters stored (example: E
2
PROM
fault).
Check point
Check for too many number of parameter write times.
Corrective action
Please contact your sales representative.
Operation Panel Indication
E. PUE
FR-PU04
PU Leave Out
Name
Parameter unit disconnection
Description
This function stops the inverter output if communication
between the inverter and PU is suspended, e.g. the PU is
disconnected, when "2", "3", "16" or "17" was set in Pr. 75.
This function stops the inverter output if the number of
successive communication errors is greater than the number
of permissible retries when the Pr. 121 value is "9999" for
RS-485 communication from the PU connector.
Check point
•
Check for loose fitting of the control panel (FR-PA02-
02
) or
FR-PU04.
•
Check the Pr. 75 setting.
Corrective action
Fit the control panel (FR-PA02-
02
) and FR-PU04 securely.
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