Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual page 301

Operation panel
E.RET
indication
Name
Retry count excess
If operation cannot be resumed properly within the number of retries set, this function trips the inverter.
Description This function is available only when Pr. 67 Number of retries at fault occurrence is set.
When the initial value (Pr. 67 = "0") is set, this protective function is not available.
Check point
Find the cause of fault occurrence.
Corrective action
Eliminate the cause of the error preceding this error indication.
E. 5
E. 6
Operation panel
indication
E. 7
E.CPU
Name
CPU fault
Description Stops the inverter output if the communication fault of the built-in CPU occurs.
Check for devices producing excess electrical noises around the inverter.
Check point
Check if the terminal PC is shorted with the terminal SD. (E. 6/E. 7)
Take measures against noises if there are devices producing excess electrical noises around the inverter.
Corrective action
Check the connection between the terminals PC and SD. (E. 6/E. 7)
Please contact your sales representative.
Operation panel
E.MB4 to 7
indication
Name Brake sequence fault
The inverter output is stopped when a sequence error occurs during use of the brake sequence function (Pr. 278 to
Description
Pr. 283) . This protective function is not available in the initial status. (Refer to page 135).
Check point Find the cause of alarm occurrence.
Corrective action
Check the set parameters and perform wiring properly.
Operation panel
E.IOH
indication
Name
Inrush current limit circuit fault
Description Stops the inverter output when the resistor of inrush current limit circuit overheated. The inrush current limit circuit fault
Check point
Check that frequent power ON/OFF is not repeated.
Configure a circuit where frequent power ON/OFF is not repeated.
Corrective action
If the problem still persists after taking the above measure, please contact your sales representative.
Operation panel
E.AIE
indication
Name Analog input fault
Appears if voltage(current) is input to terminal 4 when the setting in Pr.267 Terminal 4 input selection and the setting of
Description
voltage/current input switch are different.
Check point
Check the setting of Pr. 267 Terminal 4 input selection and voltage/current input switch. (Refer to page 176).
Either give a frequency command by current input or set Pr. 267 Terminal 4 input selection, and voltage/current input
Corrective action
switch to voltage input.
Operation panel
E.USB
indication
Name USB communication fault
When communication has broken during the time set in Pr. 548 USB communication check time interval, this function
Description
stops the inverter output.
Check point
Check the USB communication cable.
Check the Pr. 548 USB communication check time interval setting.
Corrective action Check the USB communication cable.
Increase the Pr. 548 USB communication check time interval setting. Or, change the setting to 9999. (Refer to page 245).
Causes and corrective actions
FR-PU04
Retry No Over
FR-PU07
Fault 5
Fault 6
FR-PU04
FR-PU07
Fault 7
CPU Fault
to
FR-PU04
E.MB4 Fault to E.MB7 Fault
FR-PU07
FR-PU04 Fault 14
FR-PU07 Inrush overheat
FR-PU04 Fault 14
FR-PU07 Analog in error
FR-PU04 Fault 14
FR-PU07 USB comm error
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