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Causes and corrective actions
Operation Panel
Indication
E.OD
FR-PU04
FR-PU07
Fault 14
E. Od
Name
Excessive position fault
Description
Stops the inverter output 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 point
y Check that the position detecting encoder mounting orientation matches the parameter.
y Check that the load is not large.
y Check that the Pr. 427 Excessive level error and Pr. 369 Number of encoder pulses are correct.
Corrective action
y Check the parameters.
y Reduce the load weight.
y Set the Pr. 427 Excessive level error and Pr. 369 Number of encoder pulses correctly.
Operation Panel
Indication
E.EP
FR-PU04 Fault 14
FR-PU07 E.EP
Name
Encoder phase fault
Description
Stops the inverter output 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 point
y Check for mis-wiring of the encoder cable.
y Check for wrong setting of Pr. 359 Encoder rotation direction.
Corrective action
y Perform connection and wiring securely.
y Change the Pr. 359 Encoder rotation direction value.
Operation Panel
Indication
E.P24
FR-PU04
FR-PU07
E.P24
Name
24VDC power output short circuit
Description
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 point y Check for a short circuit in the PC terminal output.
Corrective action
y Remedy the earth (ground) fault portion.
Operation Panel
Indication
E.CDO
FR-PU04 Fault 14
FR-PU07 OC detect level
Name
Output current detection value exceeded
Description
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 point
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 Chapter 4 of the Instruction Manual (Applied).)
Operation Panel
Indication
E.IOH
FR-PU04 Fault 14
FR-PU07 Inrush overheat
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 failure
Check point
y Check that frequent power ON/OFF is not repeated.
y Check that the power supply circuit of inrush current limit circuit contactor is not damaged.
Corrective action
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.