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Errors (Alarms)
ERRORS AND PROTECTIVE FUNCTIONS
6
Operation Panel
Indication
E. 1 to
E. 3
FR-PU04V Fault 1 to Fault 3
Name
Option alarm
Description
Stops the inverter output if a contact fault or the like of the connector between the inverter and
communication option occurs.
Check point
Check that the communication option is plugged into the connector securely.
(1 to 3 indicate the option slot numbers.)
Corrective action
• Connect the plug-in option securely.
• Please contact your sales representative.
Operation Panel
Indication
E.PE FR-PU04V Corrupt Memry
Name
Parameter storage device alarm
Description
Appears when an error occurred in the stored parameters. (E
2
PROM fault)
Check point
Check for too many number of parameter write times.
Corrective action
• Please contact your sales representative.
• When performing parameter write frequently for communication purposes, set "1" in Pr. 342 to
enable RAM write. Note that powering off returns the inverter to the status before RAM write.
Operation Panel
Indication
E.PUE FR-PU04V PU Leave Out
Name
PU disconnection
Description
This function stops the inverter output if communication between the inverter and PU is suspended,
e.g. the operation panel or parameter unit is disconnected, when "2", "3", "16" or "17" was set in Pr.
75 "reset selection/disconnected PU detection/PU stop selection". This function stops the inverter
output if the number of successive communication errors is greater than the permissible number of
retries when the Pr. 121 value is other than "9999" for RS-485 communication from the PU
connector. This function also stops the inverter output if communication is broken for the period of
time set in Pr. 122.
Check point
• Check for loose fitting of the FR-DU04-
1
or FR-PU04V.
• Check the Pr. 75 setting.
Corrective action
Fit the FR-DU04-
1
or FR-PU04V securely.
Operation Panel
Indication
E.RET FR-PU04V Retry No Over
Name Retry count excess
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.
Operation Panel
Indication
E.LF FR-PU04V ELF
Name
Output phase failure protection
Description
This function stops the inverter output if one of the three phases (U, V, W) on the inverter's output
side (load side) opens.
Check point
• Check the wiring (Check the motor for a fault.)
• Check that the capacity of the motor used is not smaller than that of the inverter.
Corrective action
• Wire the cables properly.
• Check the Pr. 251 "output phase failure protection selection" setting.
Operation Panel
Indication
E.CPU FR-PU04V CPU Fault
Name
CPU error
Description
Stops the inverter output if the communication error of the built-in CPU occurs.
Check point
—
Corrective action
Please contact your sales representative.
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