Mitsubishi Electric FR-V520-1.5K to 55K Instruction Manual page 78

Operation Panel E. 1 to
Indication E. 3
Name Option alarm
Stops the inverter output if a contact fault or the like of the connector between the inverter and
Description
communication option occurs.
Check that the communication option is plugged into the connector securely.
Check point
(1 to 3 indicate the option slot numbers.)
• Connect the plug-in option securely.
Corrective action
• Please contact your sales representative.
Operation Panel
E.PE
Indication
Name
Parameter storage device alarm
Description
Appears when an error occurred in the stored parameters. (E
Check point Check for too many number of parameter write times.
• Please contact your sales representative.
Corrective action
• 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
E.PUE
Indication
Name PU disconnection
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
Description
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 for loose fitting of the FR-DU04-
Check point
• Check the Pr. 75 setting.
Corrective action
Fit the FR-DU04-
Operation Panel
E.RET
Indication
Name
Retry count excess
If operation cannot be resumed properly within the number of retries set, this function stops the
Description
inverter output.
Check point Find the cause of alarm occurrence.
Corrective action Eliminate the cause of the error preceding this error indication.
Operation Panel
E.LF
Indication
Name
Output phase failure protection
This function stops the inverter output if one of the three phases (U, V, W) on the inverter's output
Description
side (load side) opens.
• Check the wiring (Check the motor for a fault.)
Check point
• Check that the capacity of the motor used is not smaller than that of the inverter.
• Wire the cables properly.
Corrective action
• Check the Pr. 251 "output phase failure protection selection" setting.
Operation Panel
E.CPU
Indication
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.
to
FR-PU04V
FR-PU04V
FR-PU04V
or FR-PU04V.
1
or FR-PU04V securely.
1
FR-PU04V
FR-PU04V
FR-PU04V
74
Errors (Alarms)
Fault 1 to Fault 3
Corrupt Memry
2
PROM fault)
PU Leave Out
Retry No Over
ELF
CPU Fault
6