Mitsubishi Electronics FR-S500 instruction manual FR-PU04

				Errors (Alarms)
Operation Panel Indication	PS		FR-PU04	PS
Name	PU stop
	Pr. 75 "reset selection/PU stop selection" had been set and a stop
Description	was made by pressing the	RESETSTOP of the operation panel or
	parameter unit (FR-PU04) during operation in the external
	operation mode.
Check point	Check for a stop made by pressing the RESETSTOP			of the operation
	panel during external operation.
Corrective action	Refer to page 105.
Operation Panel Indication	UV
Name	Undervoltage
	If the power supply voltage of the inverter reduces, the control
	circuit will not operate properly and will result in decreased motor
Description	torque or increased heat generation. To prevent this, if the power
	supply voltage reduces below about 115VAC (about 230VAC for
	the three-phase 400V power input series, about 58VAC for the
	single-phase 100V power input series), this function stops the
	inverter output.
Check point	• Check for a start of large-capacity motor.
	• Check that the power supply capacity is as indicated in the
	specifications (Refer to page 170.).
Corrective action	Check the power supply system equipment such as the power
	supply.

PROTECTIVE FUNCTIONS

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