Causes and corrective actions
147
6
Operation panel
indication
E.PA2
Name
Parallel operation slave 2 fault
Description
Appears on the operation panel of the master at an occurrence of a slave 2 converter fault during the parallel
operation. Appears on the master converter unit even when the RS-485 terminals are incorrectly connected.
Check point
• Check that the protective function of the salve 2 is activated.
• Check the RS-485 terminal wiring.
Corrective action
• Remove the fault of the slave 2.
• Perform correct wiring of the RS-485 terminals.
Operation panel
indication
E.PE
Name
Parameter storage device fault (control circuit board)
Description
The inverter output is shut off if a fault occurs in the parameter stored. (EEPROM failure)
Check point
Check for too many number of parameter write times.
Corrective action
Contact your sales representative.
When performing parameter writing frequently for communication purposes, set "1" in
Pr.342
Communication EEPROM write selection
to enable RAM write. Note that writing to RAM goes back to the
initial status at power OFF.
Operation panel
indication
E.PUE
Name
PU disconnection
Description
• The inverter output is shut off if the communication between the operation panel and the inverter is canceled
by removing the operation panel while the disconnected PU detection function is enabled by
Pr.75 Reset
selection/disconnected PU detection/reset limit
.
• The inverter output is shut off if communication errors occur consecutively for the permissible number of
retries or more during the RS-485 communication from the PU connector with
Pr.121 Number of PU
communication retries
"9999."
• The inverter output is shut off if communication is broken for the period of time set in
Pr.122 PU
communication check time interval
during the RS-485 communication from the PU connector.
Check point
• Check that the operation panel is connected properly.
• Check the
Pr.75
setting.
Corrective action
Connect the operation panel securely.
Operation panel
indication
E.RET
Name
Retry count excess
Description
Set the retry count during emergency drive operation(
Pr.515 Emergency drive dedicated retry count
).
If operation cannot be resumed properly within the number of retries, this function stops the outputs of the
inverter.
Check point
Find the cause of the fault occurrence.
Corrective action
Eliminate the cause of the fault preceding this fault indication.
Operation panel
indication
E.PE2
Name
Parameter storage device fault (main circuit board)
Description
The inverter output is shut off if a fault occurs in the parameter stored. (EEPROM failure)
Check point
————
Corrective action
Contact your sales representative.
Operation panel
indication
E.CPU
E.5
E.6
E.7
Name
CPU fault
Description
The inverter output is shut off if the communication fault of the built-in CPU occurs.
Check point
Check for devices producing excess electrical noises around the converter unit.
Corrective action
• Take measures against noise if there are devices producing excess electrical noises around the converter
unit.
• Contact your sales representative.
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