Toshiba VF-nC1 instruction manual Qr, Grj

								E6581090
		(Continued)
	Error		Alarm	Problem		Possible causes		Remedies
	code		code
	QR		000B	Overvoltage during	•	The deceleration time FGE is	•	Increase the deceleration time
				deceleration		too short. (Regenerative		FGE.
						energy is too large.)	•	Enable H (overvoltage
					•	H (overvoltage limit		limit operation).
						operation) is off.	•	Insert a suitable input reactor.
					•	The input voltage fluctuates
						abnormally.
					①The power supply has a
						capacity of 200kVA or more.
					②A power factor improvement
						capacitor is opened or closed.
					③A system using a thyristor is
						connected to the same power
						distribution line.
	QR		000C	Overvoltage during	•	The input voltage fluctuates	•	Insert a suitable input reactor.
				constant-speed		abnormally.
				operation	①The power supply has a
						capacity of 200kVA or more.
					②A power factor improvement
						capacitor is opened or closed.
					③A system using a thyristor is
						connected to the same power
						distribution line.
					•	The motor is in a regenerative
						state because the load causes
						the motor to run at a frequency
						higher than the inverter output
						frequency.
	QN		000D	Inverter overload	•	The acceleration time ACC is	•	Increase the acceleration time
						too short.		CEE.
					•	The DC braking amount is too	•	Reduce the DC braking amount
						large.		H and the DC braking
								time H.
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					•	The V/F setting is improper.	•	Check the V/F parameter
					•	A restart signal is input to the		setting.
						rotating motor after a	•	Use H (auto-restart) and
						momentary stop, etc.		H
					•	The load is too large.		(ride-through control).
							•	Use an inverter with a larger
								rating.
	QN		000E	Motor overload	•	The V/F setting is improper.	•	Check the V/F parameter
					•	The motor is locked up.		setting.
					•	Low-speed operation is	•	Check the load (operated
						performed continuously.		machine).
					•	An excessive load is applied to	•	Adjust QNO to the overload
						the motor during operation.		that the motor can withstand
								during operation in a low speed
								range.
	*		0009	Output phase failure	•	A phase failure occurred in the	•	Check the main circuit output
	GRJ					output line of the main circuit.		line, motor, etc., for phase
								failure.
							•	Enable H (Output phase
								failure detection).
		(Continued overleaf)

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