Mitsubishi Electronics FR-V500 instruction manual Minor fault, Fan Failure, Stall prevention

Errors (Alarms)

Operation Panel	E.EP		FR-PU04V	E.EP
Indication
Name	Encoder mis-	wiring detection
Description	The rotation command of the inverter differs from the actual motor rotation direction detected from
	the PLG during offline auto tuning.
Check point	• Check for mis-wiring of the PLG cable.
	• Check for wrong setting of Pr. 852 "PLG rotation direction".
Corrective action	• Perform connection and wiring securely.
	• Change the Pr. 852 "PLG rotation direction" value.

6.1.2Minor fault

If the protective function is activated, the output is not shut off. You can also output a minor fault signal by making parameter setting. (Set "98" in any of Pr. 190 to Pr. 192 and Pr. 195 (output terminal function selection). Refer to page 61.)

Operation Panel	FN	FR-PU04V		Fan Failure
Indication
Name	Fan fault
Description	For the inverter that contains a cooling fan,		appears on the operation panel when the
	cooling fan stops due to a fault or different operation from the setting of Pr. 244 "cooling fan
	operation selection".
Check point	Check the cooling fan for a fault.
Corrective action	Replace the fan.

6.1.3Warnings

When the protective function is activated, the output is not shut off.

Operation Panel	OL		FR-PU04V	OL
Indication
Name	Stall prevention	(overcurrent)
	V/F control	Output if the inverter output current exceeds torque restriction level.
		(Refer to page 33.).
Description	Speed
	control	• Output if torque restriction level is exceeded.
		• Output if the PLG setting is wrong.
	Position
	control
	• Check the motor for use under overload.
	• The acceleration/deceleration time may vary during V/F control. Check that the Pr. 0 "torque
Check point	boost" setting is not higher than required.
	• Check that the Pr. 851 "number of PLG pulses" and Pr. 852 "PLG rotation direction" values are
	correct.
Corrective action	• Increase the operation level using torque restriction level (analog input or parameter input).
	• Check for the Pr. 851 "number of PLG pulses" and Pr. 852 "PLG rotation direction" values.

*5:Torque restriction level can be set using Pr. 22 "torque restriction level" as desired. (150% with the factory setting)

Operation Panel	oL		FR-PU04V		oL
Indication
Name	Stall prevention	(overvoltage)
	During	If the regenerative energy of the motor becomes excessive to exceed the brake
Description		capability, this function stops the decrease in frequency to prevent overvoltage shut-
	deceleration
		off. As soon as the regenerative energy has reduced, deceleration resumes.
Check point	Check for sudden speed reduction.
Corrective action	The deceleration time may change.
	Increase the deceleration time using Pr. 8 "deceleration time".
Operation Panel	PS		FR-PU04V		PS
Indication
Name	PU stop
Description	Appears when a stop was made by pressing			of the operation panel RESETSTOP or parameter unit (FR-
	PU04V) during operation in the external operation mode with the Pr. 75 "reset selection/PU stop
	selection" setting.
Check point	Check for a stop made by pressing		STOP	of the operation panel during external operation.
			RESET
Corrective action	Refer to page 79.

77