Hitachi SJ300 Series Error Codes, Error Status Codes, Fault Detection and Clearing, Name, Code, E07.2, Codes, Codes, Error, Status, Status, Inverter Status, Inverter Status

6–5

SJ300 Inverter

Monitoring Trip Events, History, & Conditions

Fault Detection and ClearingError Status CodesError Codes

The microprocessor in the inverter detects a
variety of fault conditions and captures the event,		STOP
recording it in a history table. The inverter output	Run	RESET	Stop
turns OFF, or “trips” similar to the way a circuit			RUN
breaker trips due to an over-current condition.
Most faults occur when the motor is running (refer			STOP
to the diagram to the right). However, the inverter	Fault		RESET
		Trip
could have an internal fault and trip in Stop Mode.			Fault
In either case, you can clear the fault by pressing
the Stop/Reset key. Additionally, you can clear the

inverter’s cumulative trip history by performing the procedure “Restoring Factory Default Settings” on page 6–9 (setting B_84=00 will clear the trip history but leave inverter settings intact).

The conditions at the time of an error provide important clues to help you understand the cause. The SJ300 inverter displays a “status at trip point” digit to the right of the decimal point for some error codes. For example, E07.2 means Error 7 occurred and the inverter status was condition # “2” when the error occurred.

Status	Inverter Status	Status	Inverter Status
Codes		Codes
---.0	Reset	---.5	Run Command active with 0 Hz
			speed reference
---.1	Stop	---.6	Starting
---.2	Deceleration	---.7	DC braking
---.3	Constant speed	---.8	Overload restriction
---.4	Acceleration

An error code will appear on the display automatically when a fault causes the inverter to trip. The following table lists the cause associated with the error.

Error	Name	Probable Cause(s)
Code
E01	Over current event while at	The inverter output was short-circuited, or the
	constant speed	motor shaft is locked or has a heavy load. These
		conditions cause excessive current for the inverter,
E02	Over current event during
		so the inverter output is turned OFF.
	deceleration
		The dual-voltage motor is wired incorrectly.
E03	Over current event during
	acceleration
		Note: The SJ300 will over current trip at
		nominally 200% of rated current for models up to
		–550xxx;
		nominally 180% of rated current for models
		–750xxx to –1500xxx.
E04	Over current event during	DC braking power(A054) is set too high, or a
	other conditions	current transformer error occurred, or a noise
		source induced the error.

Troubleshooting Maintenance and