Hitachi SJ700-2 instruction manual Ga.Com

						Chapter 5 Error Codes
Name	Description	Display on			Display on	Troubleshooting and corrective action	Reference
		digital operator		remote operator			page
						Check for the noise sources located near the
Gate array	If an error occurs in the communication					inverter.
						(Remove noise sources.)	-
communica-	between the internal CPU and gate				GA.COM
						Check whether the communication cable has
tion error	array, the inverter will trip.
						been disconnected.
						(Check the connectors.)
	When the phase loss input protection					Check for the phase loss power input.
Phase loss	has been enabled (b006 = 01), the					(Check the power supply input wiring.)
	inverter will trip to avoid damage if an					Check the MCB and magnetic contactors for
input					PH.fail		-
	phase loss input is detected. The inverter					poor contacts.
protection	trips when the phase loss input					(Replace the MCB and magnetic contactors.)
	continues for about 1 second or more.
						Check for the noise sources located near the
	The inverter will trip if the gate array					inverter.
Main circuit						(Remove noise sources.)
	cannot confirm the on/off state of IGBT					Check the main circuit element for damage.	-
					Main.Cir
error (*3)	because of a malfunction due to noise or					Check the output circuit for a short circuit.
	damage to the main circuit element.					(Check the IGBT.)
						Check the inverter for abnormality.
						(Repair the inverter.)
	If instantaneous overcurrent occurs, the					Check the output circuit for a short circuit.
	main circuit element temperature is					(Check the output cables.)
	abnormal, or the main circuit element					Check for the ground fault.
IGBT error	drive power drops, the inverter will shut					(Check the output cables and motor.)	-
	off its output to protect the main circuit				IGBT	Check the main circuit element for damage.
	element. (After tripping because of this					(Check the IGBT.)
	protective function, the inverter cannot					Check the heat sink for clogging.
	retry the operation.)					(Clean the heat sink.)
	The inverter monitors the resistance of					Check whether the motor temperature is high.
	the thermistor (in the motor) connected					(Check the motor temperature.)
	to the inverter's TH terminal, and will					Check whether the internal thermistor of the
Thermistor	shut off the inverter output if the motor					motor has been damaged.	2-8
	temperature rises.				TH	(Check the thermistor.)
error							4-70
						Check whether noise has been mixed in the
						thermistor signal.
						(Separate the thermistor wiring from other
						wirings.)
	When "01" has been specified for the					Check whether the brake has been turned on
	Brake Control Enable (b120), the					and off or not.
	inverter will trip if it cannot receive the					(Check the brake.)
Braking error	braking confirmation signal within the					Check whether the wait time (b124) is too	4-79
	Brake Wait Time for Confirmation (b124)				BRAKE	short.
	after the output of the brake release					(Increase the wait time [b124].)
	signal.					Check whether the braking confirmation
						signal has been input.
						(Check the wiring.)
	If the EMR signal (on three terminals) is					Check whether an error has occurred in the
Emergency	turned on when the slide switch (SW1)					external equipment since the emergency stop
	on the logic board is set to ON, the					function was enabled.	2-8
					EMR
stop (*4)	inverter hardware will shut off the					(Recover the external equipment from the
	inverter output and display the error code					error.)
	shown on the right.
	If overload occurs during the motor
	operation at a very low speed at 0.2 Hz
Low-speed	or less, the electronic thermal protection					Check whether the motor load is too high.
overload	circuit in the inverter will detect the				OL-LowSP		-
	overload and shut off the inverter output.					(Reduce the load factor.)
protection
	(2nd electronic thermal control)
	(Note that a high frequency may be
	recorded as the error history data.)
	If timeout occurs because of line					Check whether the communication speed
Modbus	disconnection during the communication					setting is correct.
	in Modbus-RTU mode, the inverter will					Check whether the wiring distance is	4-106
communica-	display the error code shown on the				NET.ERR	appropriate.
tion error	right. (The inverter will trip according to					(Check the connections.)
	the setting of "C076".)
						Check whether the option board is mounted	Refer to the
	The inverter detects errors in the option				OP1-0	correctly.	instruction
						(Check the board mounting.)
Option 1 error	board mounted in the optional slot 1. For		to				manual for
	details, refer to the instruction manual for					Check whether the option board is used	the SJ-FB,
	the mounted option board.					correctly.	SJ-DG, or
					OP1-9	(Check the instruction manual for the option
						board.)	SJ-DN.

*3 The inverter will not accept reset commands input via the RS terminal or entered by the STOP/RESET key. Therefore, turn off the inverter power.

*4 The inverter will not accept the reset command entered from the digital operator. Therefore, reset the inverter by turning on the RS terminal.

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