Hitachi X200 Series instruction manual Reduces output as needed

6−4

Troubleshooting and Maintenance

Symptom/condition		Probable Cause	Solution
		• If using the analog input, is the	• Check the wiring.
		current or voltage at [O] or [OI]?	• Check the potentiometer or
			signal generating device.
		• Is the load too heavy?	• Reduce the load.
The motor speed will not			• Heavy loads activate the
reach the target frequency			overload restriction feature
(desired speed).			(reduces output as needed).
		• Is the inverter internally limiting	• Check max frequency setting
		the output frequency?	(A004)
			• Check frequency upper limit
			setting (A061)
		• Is the load fluctuation too great?	• Increase the motor capacity
		• Is the supply voltage unstable?	(both inverter and motor).
The rotation is unstable		• Is the problem occurring at a	• Fix power supply problem.
		particular frequency?	• Change the output frequency
			slightly, or use the jump
			frequency setting to skip the
			problem frequency.
		• Is the maximum frequency setting	• Verify the V/f settings match
The RPM of the motor does		A004 correct?	motor specifications.
not match the inverter		• Does the monitor function D001	• Make sure all scaling (such as
output frequency setting.		display the expected output	A011 to A014) is properly set.
		frequency?
		• Was power turned OFF after a	• Edit the data and press the
		parameter edit but before pressing	Store key once.
	No download has	the Store key?
		• Edits to data are permanently	• Wait six seconds or more
Inverter	occurred
		stored at power down. Was the time	before turning power OFF
data us not		from power OFF to power ON less	after editing data.
correct		than six seconds?
	The download	• Was the power turned OFF within	• Copy the data to the inverter
	to the inverter	six seconds after the display	again, and keep power ON for
	was attempted	changed from REMT to INV?	six seconds or more after
			copying.
A	True for	• Is the inverter in Run Mode? Some	• Put inverter in Stop Mode
parameter		parameters cannot be edited during	(press the Stop/reset key).
will not	certain	Run Mode.	Then edit the parameter.
change	parameters
after an
	True for all	• If you’re using the [SFT] intelligent	• Change the state of the SFT
edit
	parameters	input (software lock function)—is	input, and check the B031
(reverts to
		the [SFT] input ON?	parameter (SFT mode).
old
setting).