Hitachi CP-X200 Instruction Manual page 223

6 − 4
6 4
Symptom/condition
The motor speed will not
reach the target frequency
(desired speed).
The rotation is unstable
The RPM of the motor does
not match the inverter
output frequency setting.
No download has
occurred
Inverter
data us not
correct
The download
to the inverter
was attempted
A
True for
parameter
certain
will not
parameters
change
after an
True for all
edit
parameters
(reverts to
old
setting).
Probable Cause
If using the analog input, is the
current or voltage at [O] or [OI]?
Is the load too heavy?
Is the inverter internally limiting
the output frequency?
Is the load fluctuation too great?
Is the supply voltage unstable?
Is the problem occurring at a
particular frequency?
Is the maximum frequency setting
A004 correct?
Does the monitor function D001
display the expected output
frequency?
Was power turned OFF after a
parameter edit but before pressing
the Store key?
Edits to data are permanently
stored at power down. Was the time
from power OFF to power ON less
than six seconds?
Was the power turned OFF within
six seconds after the display
changed from REMT to INV?
Is the inverter in Run Mode? Some
parameters cannot be edited during
Run Mode.
If you're using the [SFT] intelligent
input (software lock function)—is
the [SFT] input ON?
Solution
Check the wiring.
Check the potentiometer or
signal generating device.
Reduce the load.
Heavy loads activate the
overload restriction feature
(reduces output as needed).
Check max frequency setting
(A004)
Check frequency upper limit
setting (A061)
Increase the motor capacity
(both inverter and motor).
Fix power supply problem.
Change the output frequency
slightly, or use the jump
frequency setting to skip the
problem frequency.
Verify the V/f settings match
motor specifications.
Make sure all scaling (such as
A011 to A014) is properly set.
Edit the data and press the
Store key once.
Wait six seconds or more
before turning power OFF
after editing data.
Copy the data to the inverter
again, and keep power ON for
six seconds or more after
copying.
Put inverter in Stop Mode
(press the Stop/reset key).
Then edit the parameter.
Change the state of the SFT
input, and check the B031
parameter (SFT mode).