Mitsubishi Electronics FR-V500 instruction manual Operation Panel Err Indication

Errors (Alarms)

Operation Panel	RB		FR-PU04V	RB
Indication
Name	Regenerative	brake prealarm
	Appears if the regenerative brake duty reaches or exceeds 85% of the Pr. 70 "special regenerative
Description	brake duty" value. If the regenerative brake duty reaches 100%, a regenerative overvoltage
	(E. OV_) occurs.
	• Check that the brake resistor duty is not high.
Check point	• Check that the Pr. 30 "regenerative function selection" and Pr. 70 "special regenerative brake
	duty" values are correct.
	• Increase the deceleration time.
Corrective action	• Check the Pr. 30 "regenerative function selection" and Pr. 70 "special regenerative brake duty"
	values.
Operation Panel	TH		FR-PU04V	TH
Indication
Name	Electronic thermal relay prealarm
Description	Appears if the integrating value of the electronic thermal relay reaches or exceeds 85% of the
	preset level. If it reaches 100% of the preset level, a motor overload shutoff (E. THM) occurs.
Check point	Check for large load or sudden acceleration.
Corrective action	Reduce the load weight or the number of operation times.
Operation Panel	MT		FR-PU04V	MT
Indication
Name	Maintenance	signal output
Description	Indicates that the cumulative energization time of the inverter has reached a given time.
Check point	Check that Pr. 890 "maintenance output setting time" has been set. (A short time has been set.)
Corrective action	After checking the energization time, write "0" to Pr. 892 "maintenance output signal clear".
Operation Panel	SL		FR-PU04V	SL
Indication
Name	Speed limit	indication (speed restriction)
Description	Output if the speed restriction level is exceeded during torque control.
Check point	• Check that the torque command is not larger than required.
	• Check that the speed restriction level is not low.
Corrective action	Decrease the torque restriction. Increase the speed restriction level.
Operation Panel	Err.
Indication
	This alarm appears if:
	• The RES signal is on;
	• You attempted to make parameter setting in the external operation mode;
	• You attempted to change the operation mode during operation;
Description	• You attempted to set any parameter value outside its setting range;
	• The PU and inverter cannot make normal communication;
	• You attempted to make parameter setting during operation (when signal STF or STR is on); or
	• You attempted to make parameter setting when Pr. 77 "parameter write disable selection" has
	been set to disable parameter write.
Corrective action	Perform run and operation securely.

ERRORS AND PROTECTIVE FUNCTIONS

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