Mitsumi electronic 55K Under Voltage, Sink O/Temp, Fin overheat, Ground Fault, OH Fault

				PROTECTIVE FUNCTIONS
Operation Panel	E.UVT		FR-PU04		Under Voltage
Indication
Name	Undervoltage protection
	If the power supply voltage of the inverter reduces, the control circuit will not
	operate properly and will result in decreased motor torque or increased heat
Description	generation. To prevent this, if the power supply voltage reduces below 150V
	(approximately 300V for the 400V class), this function stops the inverter output.
	When a jumper is not connected across P-P1 <+ - P1>, the undervoltage
	protective function is activated.
Check point	Check for start of large-capacity motor.
	Check that a jumper or DC reactor is connected across terminals P-P1 <+ - P1>.
Corrective action	Check the power supply system equipment such as power supply.
	Connect a jumper or DC reactor across terminals P-P1 <+ - P1>.
Operation Panel		E.FIN	FR-PU04		H/Sink O/Temp
Indication
Name	Fin overheat
Description	If the cooling fin overheats, the overheat sensor is actuated to stop the inverter
	output.
Check point	•	Check for too high ambient temperature.
	•	Check for cooling fin clogging.
Corrective action	Set the ambient temperature to within the specifications.
Operation Panel		E.GF	FR-PU04		Ground Fault
Indication
Name	Output side ground fault overcurrent protection
Description	This function stops the inverter output if a ground fault overcurrent flows due to
	a ground fault which occurred in the inverter's output (load) side.
Check point	Check for a ground fault in the motor and connection cable.
Corrective action	Remedy the ground fault portion.
Operation Panel	E.OHT		FR-PU04		OH Fault
Indication
Name	External thermal relay operation (Note 3)
	If the external thermal relay designed for motor overheat protection or the
Description	internally mounted temperature relay in the motor switches on (contacts open),
	the inverter output is stopped. If the relay contacts are reset automatically, the
	inverter will not restart unless it is reset.
	•	Check for motor overheating.
Check point	•	Check that the value of 7 (OH signal) is set correctly in any of Pr. 180 to
		Pr. 186 (input terminal function selection).
Corrective action	Reduce the load and operating duty.

Note 3: This function is activated only when OH has been set to any of Pr. 180 to Pr. 186 (input terminal function selection).

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