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Causes and corrective actions
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
Operation Panel
Indication
Name
Description
Check point
Corrective action
424
E.OD
Excessive position fault
Trips the inverter when the difference between the position command and position feedback exceeds
Pr. 427 Excessive level error under position control.
This fault is not available in the initial status.
· Check that the position detecting encoder mounting orientation matches the parameter.
· Check that the load is not large.
· Check that the Pr. 427 Excessive level error and Pr. 369 Number of encoder pulses are correct.
· Check the parameters.
· Reduce the load weight.
· Set the Pr. 427 Excessive level error and Pr. 369 Number of encoder pulses correctly.
E.EP
Encoder phase fault
Trips the inverter when the rotation command of the inverter differs from the actual motor rotation
direction detected from the encoder.
This fault is not available in the initial status.
· Check for mis-wiring of the encoder cable.
· Check for wrong setting of Pr. 359 Encoder rotation direction.
· Perform connection and wiring securely.
· Change the Pr. 359 Encoder rotation direction value.
E.P24
24VDC power output short circuit
When the 24VDC power output from the PC terminal is shorted, this function shuts off the power output.
At this time, all external contact inputs switch OFF. The inverter cannot be reset by entering the RES
signal. To reset it, use the operation panel or switch power OFF, then ON again.
· Check for a short circuit in the PC terminal output.
· Remedy the earth (ground) fault portion.
E.CDO
Output current detection value exceeded
Trips the inverter when the output current exceeds the setting of Pr. 150 Output current detection level.
This function is available when Pr. 167 Output current detection operation selection is set to "1". When the
initial value (Pr. 167 = "0") is set, this protective function is not available.
Check the settings of Pr. 150 Output current detection level, Pr. 151 Output current detection signal delay time,
Pr. 166 Output current detection signal retention time, Pr. 167 Output current detection operation selection.
(Refer to page 252.)
E.IOH
Inrush current limit circuit fault
Stops the inverter output when the resistor of inrush current limit circuit overheated. The inrush current
limit circuit failure
· Check that frequent power ON/OFF is not repeated.
· Check that the primary side fuse (5A) in the power supply circuit of the inrush current limit circuit
contactor (FR-A740-02160 or higher) is not fused.
· Check that the power supply circuit of inrush current limit circuit contactor is not damaged.
Configure a circuit where frequent power ON/OFF is not repeated.
If the problem still persists after taking the above measure, please contact your sales representative.
Fault 14
FR-PU04
FR-PU07
E.Od
FR-PU04
Fault 14
FR-PU07
E.EP
FR-PU04
E.P24
FR-PU07
FR-PU04
Fault 14
FR-PU07
OC detect level
FR-PU04
Fault 14
FR-PU07
Inrush overheat
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