Hitachi J300U Series instruction manual Troubleshooting, Error Messages and Diagnosis

9.TROUBLESHOOTING

9.1Error Messages and Diagnosis

When the inverter goes wrong, it operates as indicated below. Find the cause and take contermeasures.

Error Messages and Diagnosis

			Symptom
						How(NOTE1)toreset
Circuitbreaker(MCB)	Electromagneticcontactor(Mg)	Thermalrelay(THRY)	Display on the	Failurealarmrelay
			digital operator		Cause
							Check	Countermeasure
			(display on the
			LCD of the		(explanation
			remote operator)		of message)
			E 0 1	●	Overcurrent detected	A	Check whether a load was	Do not change loads
					by the AC CT while		changed rapidly.	rapidly.
			( O C . D r i v e )
					the motor was running
								Check whether the output
					at a constant speed		Check whether there is a
					(overcurrent during		shorted output or ground	lines or motor is shorted.
					operation)		fault.
			E 0 2	●	Overcurrent detected	A	Check whether the speed	Set a longer deceleration
					by the AC CT during		was decreased rapidly.	time.
			( O C . D e c e l )
					motor deceleration
								Check whether the output
					(overcurrent during		Check whether there is a
					deceleration)		shorted output or ground	lines or motor is shorted.
							fault.
			E 0 3	●	Overcurrent detected	A	Check whether a load was	Do not change loads
					by the AC CT during		changed rapidly.	rapidly.
			( O C . A c c e l )
					motor acceleration
								Check whether the output
					(overcurrent during		Check whether there is a
					acceleration)		shorted output or ground	lines or motor is shorted.
							fault.
							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 0 5	●	Overloaded inverter	A	Check for an overload.	Lower the load ratio.
					(operation under an
			( O v e r . L )					Set an appropriate level.
					overload)		Check whether the
							electronic thermal level is
							correct. (Check whether the
							level has been changed.)

NOTE 1: How to reset

A: Stop the inverter. Then, connect the <RS> and <CM1> control terminals or press the STOP/RESET key on the operator.

B:Opeate the circuit breaker and electromagnetic contactor (turn the power on again).

C:Stop the inverter. Then, reset the thermal relay.

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