Alliance Laundry Systems HX, SX, UX OPL Name, Panel, Operation, Indication, Check point, Corrective action, Description and NOTES, No Motor Operation With AC Drive Fault

			Section 3 Troubleshooting
		No Motor Operation With AC Drive Fault

Operation
Panel
Indication	Name	Description and NOTES	Check point	Corrective action

	Overcurrent	When the inverter output current reaches or exceeds	• Check for sudden	Increase the
	shut-off during	approximately 200% of the rated current during	acceleration.	acceleration time.
	acceleration	acceleration, the protective circuit is activated to stop	• Check for output
		the inverter output.	short-circuit/ground
			fault.

	Overcurrent	When the inverter output current reaches or exceeds	• Check for sudden load	Keep load stable.
	shut-off during	approximately 200% of the rated current during	change.
	constant speed	constant speed, the protective circuit is activated to	• Check for output short-
		stop the inverter output.	circuit/ground fault.

	Overcurrent	When the inverter output current reaches or exceeds	• Check for sudden speed	Increase the
	shut-off during	approximately 200% of the rated current during	reduction.	deceleration time.
	deceleration	deceleration (other than acceleration or constant	• Check for output	Adjust brake operation.
		speed), the protective circuit is activated to stop the	short-circuit/ground
		inverter output.	fault.
			• Check for too fast
			operation of motor's
			mechanical brake.

	Regenerative	If regenerative energy causes the inverter's internal	Check for too slow	Decrease the
	overvoltage	main circuit DC voltage to reach or exceed the	acceleration.	acceleration time.
	shut-off during	specified value, the protective circuit is activated to
	acceleration	stop the inverter output. It may also be activated by a
		surge voltage generated in the power supply system

	Regenerative	If regenerative energy causes the inverter's internal	Check for sudden load	Keep load stable. Use
	overvoltage	main circuit DC voltage to reach or exceed the	change.	the brake unit or high
	shut-off during	specified value, the protective circuit is activated to		power factor converter
	constant speed	stop the inverter output. It may also be activated by a		(FR-HC) as required.
		surge voltage generated in the power supply system.

	Regenerative	If regenerative energy causes the inverter's internal	Check for sudden speed	• Increase the
	overvoltage	main circuit DC voltage to reach or exceed the	reduction.	deceleration time.
	shut-off during	specified value, the protective circuit is activated to		(Set the deceleration
	deceleration or	stop the inverter output. It may also be activated by a		time which matches
	stop	surge voltage generated in the power supply system.		the inertia moment of
				the load.)
				• Decrease the braking
				duty.
				• Use the brake unit or
				high power factor
				converter (FR-HC) as
				required.

	Motor overload	The electronic overcurrent protection in the inverter	Check the motor for use	• Reduce the load
	shut-off	detects motor overheat due to overload or reduced	under overload.	weight.
	(electronic	cooling capability during constant-speed operation to		• For the
	overcurrent	stop the inverter output.When a multi-pole motor or		constant-torque
	protection)	two or more motors are run, provide a thermal relay		motor, change the Pr.
		in the output side of the inverter.		71 setting to the
				constant-torque
				motor setting.

	Inverter	If a current of more than 150% of the rated output	Check the motor for use	Reduce the load
	overload shut-	current flows and overcurrent shut-off does not occur	under overload.	weight.
	off (electronic	(200% or less) inverse-time characteristics cause the
	overcurrent	electronic overcurrent protection to be activated to
	protection)	stop the inverter output in order to protect the output
		transistors.
		Note: Resetting the inverter initializes the internal
		heat integrating data of the electronic overcurrent
		protection.

	Fin overheat	If the cooling fin overheats, the overheat sensor is	• Check for too high	Set the ambient
		actuated to stop the inverter output.	ambient temperature.	temperature to within
			• Check for cooling fin	the specifications.
			clogging.

9001900