Hitachi J300U Series instruction manual Symptom, Display on, Check Countermeasure

			Symptom
Circuit breaker(MCB)	Electromagnetic contactor (Mg)	Thermal relay(THRY)	Display on the		Failure alarm relay		How to reset
			digital operator			Cause
								Check	Countermeasure
			(display on the
			LCD of the			(explanation
			remote operator)			of message)
			E 3 3		●	(NOTE 1)	A	Check whether the speed was	Set a longer acceleration
						Failure detected by a		increased rapidly.	time.
			( P M . A c c e l )
						detector in the power
						module during motor		Check whether a load was	Do not change loads rapidly.
						acceleration, or		changed rapidly.
						excessive temperature
						rise in the inverter		Check whether there is a shorted	Check whether the output
								output or ground fault.	lines or motor is shorted.
								Check whether the start	Lower the start frequency.
								frequency is too high.
								Check whether the torque	Lower the torque boost.
								boost is too high.
								Check whether the motor is	Check the motor or loads.
								locked.
			E 3 4		●	(NOTE 1)	A	Check whether the	Check the installation.
						Failure detected by a		installation is vertical and the
			( P M . E R R )
						detector in the power		wall is a nonflammable wall
						module while the motor		such as an iron plate.
						was stopping, or
						excessive temperature		Check whether the cooling fan	Replace the cooling fan.
						rise in the inverter		is running and the ambient
								temperature is too high.
								Check the internal power	Repair the internal power
								supply.	supply.
								Check the main devices.	Repair main devices.
			E 6 0		●	Defective J-FB PC	A	Refer to the manual supplied
			( O P 1	0 )		board		with the J-FB PC board.
			to
			E 6 7
			( O P 1	7 )
			E 7 0		●	Defective J-FB PC	A	Refer to the manual supplied
			( O P 2	0 )		board		with the J-FB PC board.
			to
			E 7 7
			( O P 2	7 )

NOTE 1: The failures detectable in the power module are overcurrents, excessively hot main devices, and insufficient voltages from the gate circuit power supply.

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