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
Probable Cause
Countermeasure
¡
If using the analog input, is
the current or voltage at"O"
or"OI"?
¡
Check the wiring
¡
Check the potentiometer or
signal generating device.
¡
Reduce the load.
¡
Heavy loads activate the
overload restriction feature
(reduces output as needed)
¡
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 is
properly set
¡
Is the load too heavy?
¡
Is the load fluctuation too
great?
¡
Is the supply voltage
unstable?
¡
Is the problem occurring at
a particular frequency?
¡
Is the maximum frequency
setting A04 correct?
¡
Does the monitor function
d01 display the expected
output frequency?
The direction of
the motor is
reversed
¡
Are the connections of
output terminal U, V, and
W correct?
¡
Is the phase sequence of
the motor forward or reverse
with respect to U, V, and W?
¡
Are the control terminals
[FW] and [RV]wired
correctly?
¡
Is parameter F04 properly
set?
¡
Use terminal [FW] for [RV]
is reverse.
¡
Set motor direction in F04.
¡
Make connections according
to the phase sequence of the
motor. In general:
FWD=U-V-W, and
REV=U-W-V.
11-2
ENDA E-100
INSTRUCTION MANUAL
