Alliance Laundry Systems HX, SX, UX OPL No Motor Operation With AC Drive Fault(continued)

Section 3 Troubleshooting

No Motor Operation With AC Drive Fault(continued)

Operation
Panel
Indication	Name	Description and NOTES	Check point	Corrective action

	Brake transistor	If a brake transistor fault occurs due to excessively	Check for improper	• Change the inverter.
	alarm detection	large regenerative energy from the motor, for	braking duty.	• Please contact your
		example, that fault is detected to stop the inverter		sales representative.
		output. In this case, the inverter power must be
		switched off immediately.
		Note: This function is activated only when the
		optional brake resistor is connected.

	Output side	This function stops the inverter output if a ground	Check for a ground fault	Remedy the ground
	ground fault	fault overcurrent flows due to a ground fault which	in the motor and	fault portion.
	overcurrent	occurred in the inverter's output (load) side. Use Pr.	connection cable.
	protection	249 "ground fault detection at start” to set whether
		the protective function is to be activated or not. (In the
		400V class, the protective function is always active.)

	External	If the external thermal relay designed for motor	• Check for motor	Reduce the load and
	thermal relay	overheat protection or the internally mounted	overheating.	operating duty.
	operation	temperature relay in the motor switches on (contacts	• Check that the value of
		open), the inverter output is stopped. If the relay	7 (OH signal) is set
		contacts are reset automatically, the inverter will not	correctly in any of Pr.
		restart unless it is reset.	180 to Pr. 183 (input
		Note: This function is activated only when OH has	terminal function
		been set to any of Pr. 180 to Pr. 183 (input terminal	selection).
		function selection).

	Stall prevention	The running frequency has fallen to 0 by stall	Check the motor for use	Reduce the load
		prevention activated. (OL while stall prevention is	under overload.	weight.
		being activated.)

	Option alarm	Also stops the inverter output if the dedicated option	Check that the plug-in	• Connect the plug-in
	Stops the	used in the inverter results in setting error or	option connector is	option securely.
	inverter output	connection (connector) fault.	plugged securely.	• Please contact your
	if the inverter	Note: Only when the FR-E5NC is fitted to the		sales representative.
	station is	three-phase 400V power input model.
	disconnected
	from the system
	in the NET
	mode.

	Parameter	A fault occurred in parameters stored (example:	Check for too many	Please contact your
	storage device	E2PROM fault).	number of parameter	sales representative.
	alarm		write times.

	Parameter unit	This function stops the inverter output if	• Check for loose fitting	Fit the control panel
	disconnection	communication between the inverter and PU is	of the control panel	(FR-PA02-o2) and
		suspended, e.g. the PU is disconnected, when "2",	(FR-PA02-o2) or	FR-PU04 securely.
		"3", "16" or "17" was set in Pr. 75. This function stops	FR-PU04.
		the inverter output if the number of successive	• Check the Pr. 75 setting.
		communication errors is greater than the number of
		permissible retries when the Pr. 121 value is "9999"
		for RS-485 communication from the PU connector.

	Retry count	If operation cannot be resumed properly within the	Find the cause of alarm	Eliminate the cause of
	exceeded	number of retries set, this function stops the inverter	occurrence.	the error preceding this
		output.		error indication.

	CPU error	If the arithmetic operation of the built-in CPU does		Please contact your
		not end within a predetermined period, the inverter		sales representative.
		self-determines it as an alarm and stops the output.

	CPU error	This function stops the inverter output if a		Please contact your
		communication error occurs in the built-in CPU.		sales representative.
		(400V class only)

9001900