MGI M4000E series, Instruction Manual

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168
PROTECTIVE FUNCTIONS
Operation Panel Indication
E. OLT
FR-PU04-MGI
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-MGI Option Fault
Name Option alarm
Description
Stops the inverter output if a functional fault (e.g.
communication error of the communication option) occurs in
the communication option.
Stops the inverter output if the inverter station is disconnected
from the system in the NET mode.
Stops the inverter output if a setting error or connection
(connector) fault occurs during use of in-board option.
Check point Check that the communication cable is not open.
Corrective action Please contact your sales representative.
Operation Panel Indication E. PE FR-PU04-MGI 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-MGI 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 other than "9999"
for RS-485 communication from the PU connector.
Check point
• Check for loose fitting of the operation panel (FR-PA02
-02
) or
FR-PU04-MGI.
• Check the Pr. 75 setting.
Corrective action
Fit the operation panel (FR-PA02
-02
) and FR-PU04-MGI
securely.
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