Hitachi L2002 6–8, Name, Code, Error, Cause(s), Error Codes, Fault Detection and Clearing, “Restoring Factory Default Settings” on page

6–5

L2002 Inverter

Monitoring Trip Events, History, & Conditions

Fault Detection and Clearing

The microprocessor in the inverter detects a variety
of fault conditions and captures the event, record-		STOP
ing it in a history table. The inverter output turns	Run	RESET	Stop
		RUN
OFF, or “trips” similar to the way a circuit breaker
trips due to an over-current condition. Most faults	Fault		STOP
			RESET
occur when the motor is running (refer to the
		Trip	Fault
diagram to the right). However, the inverter could

have an internal fault and trip in Stop Mode. 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 6–8 (setting B084=00 will clear the trip history but leave inverter settings intact).

Troubleshooting Maintenance and

Error Codes

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	Cause(s)
Code
E 0 1	Over-current event while	The inverter output was short-circuited, or the motor
	at constant speed	shaft is locked or has a heavy load. These conditions
		cause excessive current for the inverter, so the inverter
E 0 2	Over-current event during
		output is turned OFF.
	deceleration
		The dual-voltage motor is wired incorrectly.
E 0 3	Over-current event during
	acceleration
E 0 4	Over-current event during
	other conditions
E 0 5	Overload protection	When a motor overload is detected by the electronic
		thermal function, the inverter trips and turns OFF its
		output.
E 0 7	Over-voltage protection	When the DC bus voltage exceeds a threshold, due to
		regenerative energy from the motor.
E 0 8	EEPROM error	When the built-in EEPROM memory has problems
		due to noise or excessive temperature, the inverter
		trips and turns OFF its output to the motor.
E 0 9	Under-voltage error	A decrease of internal DC bus voltage below a thresh-
		old results in a control circuit fault. This condition can
		also generate excessive motor heat or cause low
		torque. The inverter trips and turns OFF its output.
E 1 1	CPU error	A malfunction in the built-in CPU has occurred, so
		the inverter trips and turns OFF its output to the
E 2 2
		motor.