Mitsubishi Electronics FR-S500 Motor Overload, Inv. Overload, Sink O/Temp, Br. Cct. Fault

				Errors (Alarms)
Operation Panel Indication	THM		FR-PU04	Motor Overload
Name	Motor overload	shut-off (electronic thermal		relay function) (* 1)
	The electronic thermal relay function in the inverter detects motor
	overheat due to overload or reduced cooling capability during low-
Description	speed operation to stop the inverter output. When a multi-pole
	motor or two or more motors are run, provide a thermal relay on
	the output side of the inverter.
	Protection from burning due to motor temperature rise.
Check point	Check the motor for use under overload.
Corrective action	• Reduce the load weight.
	• For a constant-torque motor, set the constant-torque motor in Pr.
	71 "applied motor".
Operation Panel Indication	THT		FR-PU04	Inv. Overload
Name	Inverter overload shut-off (electronic thermal relay function) (* 1)
	If a current of more than 150% of the rated output current flows
	and overcurrent shut-off does not occur (150% or less), inverse-
Description	time characteristics cause the electronic thermal relay function to
	be activated to stop the inverter output in order to protect the
	output transistors.
	Output transistor protection from overheat
Check point	Check the motor for use under overload.
Corrective action	Reduce the load weight.

*1. Resetting the inverter initializes the internal thermal integratied data of the electronic thermal relay function.

Operation Panel Indication	FIN	FR-PU04	H/Sink O/Temp
Name	Fin overheat
Description	If the heatsink overheats, the temperature sensor is actuated to
	stop the inverter output.
Check point	• Check for too high ambient temperature.
	• Check for heatsink clogging.
Corrective action	Set the ambient temperature to within the specifications.

Operation Panel Indication	BE		FR-PU04	Br. Cct. Fault
Name	Internal circuit	error
Description	Appears when an internal circuit error occurred.
Corrective action	Please contact your sales representative.

PROTECTIVE FUNCTIONS

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