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Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
582
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
E.SER
Communication fault (inverter)
The inverter output is shut off when communication error occurs consecutively for the permissible number of
retries or more when Pr.335 RS-485 communication retry count ≠ "9999" during RS-485 communication
through the RS-485 terminals. The inverter output is also shut off if communication is broken for the period of
time set in Pr.336 RS-485 communication check time interval.
Check the RS-485 terminal wiring.
Perform wiring of the RS-485 terminals properly.
E.AIE
Analog input fault
The inverter output is shut off when a 30 mA or higher current or a 7.5 V or higher voltage is input to terminal 2
while the current input is selected by Pr.73 Analog input selection, or to terminal 4 while the current input is
selected by Pr.267 Terminal 4 input selection.
Check the Pr.73, Pr.267, and the voltage/current input switch settings. (Refer to
Either give a current less than 30 mA, or set Pr.73, Pr.267, and the voltage/current input switch to the voltage
input and input a voltage.
E.USB
USB communication fault
The inverter output is shut off when the communication is cut off for the time set in Pr.548 USB communication
check time interval.
• Check that the USB communication cable is connected securely.
• Check the Pr.548 setting.
• Connect the USB communication cable securely.
• Increase the Pr.548 setting or set "9999." (Refer to
E.SAF
Safety circuit fault
• The inverter output is shut off when a safety circuit fault occurs.
• The inverter output is shut off if the either of the wire between S1 and SIC or S2 and SIC becomes non-
conductive while using the safety stop function.
• When the safety stop function is not used, the inverter output is shut off when the shorting wire between
terminals S1 and PC or across S2 and PC is disconnected.
• Check that the safety relay module or the connection has no fault when using the safety stop function.
• Check if the shorting wire between S1 and PC or between S2 and PC is disconnected when not using the safety
stop function.
• When using the safety stop function, check that wiring of terminal S1, S2 and SIC is correct and the safety stop
input signal source such as a safety relay module is operating properly. Refer to the Safety Stop Function
Instruction Manual for causes and countermeasures. (Contact your sales representative for the manual.)
• When the safety stop function is not used, short across terminals S1 and PC and across S2 and PC with
shorting wires. (Refer to
page
E.PBT
E.13
E.BE
Internal circuit fault
The inverter output is shut off when an internal circuit fault occurs.
Contact your sales representative.
E.OS
Overspeed occurrence
The inverter output is shut off when the motor speed exceeds the Pr.374 Overspeed detection level under PM
motor control. This protective function is not available in the initial status.
• Check that the Pr.374 setting is correct.
• Set the Pr.374 correctly.
FR-LU08 indication VFD Comm error
FR-LU08 indication Analog input fault
FR-LU08 indication USB comm error
page
523.)
FR-LU08 indication safety circuit fault
70.)
FR-LU08 indication
FR-LU08 indication Overspeed occurrence
page
330.)
PBT fault
Internal circuit fault
Br. Cct. Fault

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