Hitachi L300P Series service manual Igbt

									Digital
		Trip				contents			operator	Remedy, advice
									display
				If Instant power failure 15ms or more happened, INV
Instant		power	failure	will shut the output. If the instant power failure is longer						Any incoming AC V drop
				than preset allowable time or affordable control supply
detection				voltage time,		INV will work as normal power			off. This	No contact failure in MCB,Mg?
				means INV will re-start with the run command after the
				long instant power failure.
				If main circuit temp. was exceeded specific level such						Any cooling fan failure, disturbance of
Over heat detection				as high ambient temp., fan failure, INV will shut the						the cooling such as dusty fin.
				output.						Installation vertical
				The temp. is detected at heat sink over 100 Celsius .						Ambient temp. high
Gate	array(INV		domestic	If there was		any communication error between micro				Any big noise near the INV
				processor and gate array, or if gate array can’t detect						Any IGBT failure
problem)
				IGBT’s turn on/off such as IGBT failure.						Connection of flat cable/ribbon cable
Input		phase	failure	If one of incoming 3 phase voltage was missed, INV will						Any missing phase
				shut the output if the detect function was preset.
detection										No contact failure in MCB,Mg?
				The detection delay is about 1 sec.
				If instant over current happened between INV and the						Short circuit or earth contact (ground
IGBT		over	current	connected motor, INV will shut the output.
										fault) in the motor or the motor cable
detection		(equivalent as		Under this INV trip, the detected phase is possible to						Any IGBT failure
				refer at d105 display.
										Any loose connection on main circuit
power module)				Even retry function is preset, INV can not retry after this
										such as power board
				detection.
Thermister(customer’s				If motor over temp. happened by integrated thermistor’s						Check the motor temp.
				resistor value in the motor, INV will shut the output.						Any thermistor failure in the motor
selection)
				After	INV output brake release signal,			INV	couldn’t	Any noise in the thermistor signal
Brake	error (customer’s									Is the brake working ON/OFF
				detect	brake	on/off within	b124(waiting	time	for brake
										Preset B124 too short
selection)				operation. (if		b120(brake	control switch) was preset
										Brake signal/connection OK
				“01 ”)
				Detection of connected option card 1. For more details,						Make sure the connection of the card
Option board 1 error 0–9				refer to the instruction manual of the card.					-
										1 Make sure if the usage is proper
				Detection of connected option card 2. For more details,						Make sure the connection of the card
Option boad 2 error 0-9				refer to the instruction manual of the card.					-
										2 Make sure if the usage is proper
				Stand by condition because of low DC bus voltage such						Any incoming AC V drop
Power off/ waiting from AC				as power off, INV will shut the output.						No contact failure in MCB,Mg?
				The detection level is same as under voltage trip.						Check the DC bus voltage
incoming voltage recovery										Perform above adjustment referring to
										d102, so that the DC bus voltage does
										not exceed the trip level.

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