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PROTECTIVE FUNCTIONS
131
FR-PU04 Indication
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.
FR-PU04 Indication
Option Fault
Name
Option alarm
Description
Stops the inverter output if an internal connector fault occurs.
Check point
Corrective action
Please contact your sales representative.
FR-PU04 Indication
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.
FR-PU04 Indication
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 PU.
•
Check the Pr. 75 setting.
Corrective action
Fit the PU securely.
FR-PU04 Indication
Retry No Over
Name
Retry count exceeded
Description
If operation cannot be resumed properly within the number of retries
set, this function stops the inverter output.
Check point
Find the cause of alarm occurrence.
Corrective action
Eliminate the cause of the error preceding this error indication.