Hitachi SJ700-2 Series service manual Ga.Com

Name			Description				Display on	Display on	Troubleshooting and corrective action
							digital operator	remote operator
									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	phase loss input is detected. The inverter							PH.fail	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.
									(Remove noise sources.)
Main circuit	cannot confirm the on/off state of IGBT
								Main.Cir	Check the main circuit element for damage.
error (*3)	because	of	a	malfunction	due to				Check the output circuit for a short circuit.
	noise,short or damage to the main circuit
									(Check the IGBT.)
	element.
									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							IGBT	(Check the output cables and motor.)
	off its output to protect the main circuit								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.
	temperature rises.							TH	(Check the thermistor.)
error
									Check whether noise has been mixed in the
									thermistor signal.
									(Separate the thermistor wiring from other
	When "01" has been specified for the								wirings.)
									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
	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
	turned on when the slide switch (SW1)								external equipment since the emergency stop
Emergency	on the logic board is set to ON, the							EMR	function was enabled.
	inverter hardware will shut off the								(Recover the external equipment from the
stop (*4)	inverter output and display the error code								error.)
	shown on the right.								Check for the noise sources located near the
	Malfunction due to incoming noise,in								inverter.(Remove noise sources.)
	case EMR terminal is not ON.
	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
protection	overload and shut off the inverter output.								(Reduce the load factor.)
	(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
communica-								NET.ERR
	display the error code shown on the								appropriate.
tion error	right. (The inverter will trip according to								(Check the connections.)
	the setting of "C076".)								Check whether the option board is mounted
	The inverter detects errors in the option							OP1-0	correctly.
									(Check the board mounting.)
	board mounted in the optional slot 1. For						to
Option 1 error									Check whether the option board is used
	details, refer to the instruction manual for								correctly.
	the mounted option board.							OP1-9
									(Check the instruction manual for the option
									board.)

*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.

2 - 3