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132
Causes and corrective actions
Operation Panel
Indication
E.9 FR-PU07 Fault 9
Name
Input power supply fault 2
Description
When the converter operation is stopped continuously due to the fluctuation of input voltage or input current,
it is regarded as a power supply fault, and the converter operation and the inverter output are stopped.
Checkpoint
Check the power source and the wiring.
Corrective action
Perform wiring correctly.
Adjust Pr. 80 Voltage control proportional gain Pr. 81 Voltage control integral gain Pr. 82 Current control
proportional gain , and Pr. 83 Current control integral gain.
Operation Panel
Indication
E.CTE
FR-PU07 E.CTE
Name
Operation panel power supply short circuit, RS-485 terminal power supply short circuit
Description
When the operation panel power supply (PU connector) is shorted, this function shuts OFF the power output
and stops the converter operation. At this time, the operation panel (parameter unit) cannot be used and RS-
485 communication from the PU connector cannot be made. When the power supply for the RS-485
terminals are shorted, this function shuts OFF the power output.
To reset, enter RES signal or switch power OFF, then ON again.
Checkpoint
Check for a short circuit in the PU connector cable.
Check if the RS-485 terminals are used.
Corrective action
Check the PU and cable.
The RS-485 terminals cannot be used.
Operation Panel
Indication
E.P24
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 converter cannot be reset by entering the RES signal.
To reset, use the operation panel or switch power OFF, then ON again.
Checkpoint
Check for a short circuit in the PC terminal output.
Corrective action
Repair the short-circuited portion.
Operation Panel
Indication
E.CDO
FR-PU07 OC detect level
Name
Input current detection value exceeded
Description
Stops the converter operation when the input current exceeds Pr. 25 Input current detection level setting.
This function is available when "1" is set to Pr. 28 Input current detection operation selection. When the initial
value (Pr. 28 = "0") is set, this protective function is not available.
Checkpoint
Check the settings of Pr. 25 Input current detection level , Pr. 26 Input current detection signal delay time, Pr. 27 Input
current detection signal retention time, Pr. 28 Input current detection operation selection (Refer to page 80)
Operation Panel
Indication
E.IOH
FR-PU07 Inrush overheat
Name
Inrush current limit circuit fault
Description
Stops the converter operation when the inrush current limit contactor does not turn ON, a thermostat of the
limit resistor activates, or the filter capacitor alarm detector activates. (Filter capacitor alarm detector is only
available for 560K.) Inrush current limit circuit is faulty.
When the terminal PC and SD are shorted, the ROH signal turns OFF and the converter operation stops.
Checkpoint
Check that ROH1 and ROH2 of the outside box are respectively connected to ROH and SD of the
converter.
Check that the inrush current limit circuit contactor and buffer circuit are not damaged.
Check that frequent power ON/OFF is not repeated.
Check that the output terminal of the filter capacitor alarm detector is connected to the terminal ROH.
Check that thermostats of the limit resistor are connected to terminal ROH.
Check that terminals PC and SD are not shorted.
Corrective action
Connect ROH1 and ROH2 of the outside box to ROH and SD of the converter respectively.
Check the wiring of the output terminal of the filter capacitor alarm detector and the terminal ROH.
Configure a circuit where frequent power ON/OFF is not repeated.
Check the wiring between the thermostats of the limit resistor and terminal ROH.
Check the wiring between terminals PC and SD.
If the problem still persists after taking the above measure, please contact your sales representative.
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