Mitsubishi Electronics FR-V500 instruction manual Indication Fault Name, Operation Panel P24

Errors (Alarms)

Operation Panel	E. 6		FR-PU04V	Fault 6
Indication
	E. 7			Fault 7
Name	CPU error
	If the arithmetic operation of the peripheral circuit of the built-in CPU does not end within the
Description	predetermined period or if an error exists in the receive data of the built-in CPU, the inverter self-
	determines it as an alarm and stops the output.
Check point	—
Corrective action	Please contact your sales representative.
Operation Panel	E.P24		FR-PU04V	E.P24
Indication
Name	24VDC power	output short circuit
	When the 24VDC power output from the PC terminal is shorted, this function shuts off the power
	output.
Description	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.
	When the 24VDC power for encoder is shorted, this function shuts off the power output.
	• Check for a short circuit in the PC terminal output.
Check point	• Check for wrong wiring.
	• Check for a loose connector. Check that the cables are short-circuited.
Corrective action	• Remedy the short circuit portion.
	• Connect the cables securely. Change the cables.
Operation Panel	E.P12		FR-PU04V	E.P12
Indication
Name	12VDC power	output short circuit
Description	When the 12VDC power for encoder is shorted, this function shuts off the power output.

•Check for wrong wiring.

Check point

•Check for a loose connector. Check for an open cable.

Corrective action Connect the cables securely. Change the cables.

Operation Panel	E.CTE			FR-PU04V	—
Indication
Name	Operation panel power supply short circuit
	When the operation panel power supply (P5S of the PU connector) is shorted, this function shuts
	off the power output. At this time, the operation panel (parameter unit) cannot be used and RS-485
Description	communication from the PU connector cannot be made. To reset, enter the RES signal or switch
	power off, then on again.
	When the 5VDC power for encoder is shorted, this function shuts off the power output.
	• Check for a short circuit in the PU connector cable. Check for a loose connector.
Check point	• Check that cables are short-circuited.
	• Check for wrong wiring.
Corrective action	• Check the PU and cable.
	• Connect the cable securely. Change the cable.
Operation Panel	E.MB1 to 7		to	FR-PU04V	—
Indication
Name	Brake sequence	error
	• The inverter output is stopped when a sequence error occurs during use of the brake sequence
Description	function (Pr. 278 to Pr. 285).
	• If (detection frequency) - (output frequency) > Pr. 285 under vector control, E.MB1 occurs and the
	inverter output is stopped.
Check point	Find the cause of alarm occurrence.
Corrective action	Check the set parameters and perform wiring properly.

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