N700E INSTRUCTION MANUAL
7-1
7. Troubleshooting Tips
Symptom/condition
Probable Cause
Countermeasure
The
motor
will not
move
The inverter
outputs U,V
andW are not
supplying
voltage.
•Is the frequency command source A01
parameter settingCorrect?
•Is the Run command sourceA02
parameter settingcorrect?
•Make sure the parameter A01
setting correct?
•Make sure the parameter A02
setting correct?
•Is power being supplied to terminals
R, S and T?
If so, the power lamp should be on.
•Check terminals R, S and T then
U, V, and W
•Turn on the power supply or check
fuses.
•Is there an error code E
□□
displayed?
•Press the Func key anddetermine
the error type.
Then clear the error(Reset).
•Are the signals to the intelligent input
terminals correct?
•Is the Run Command active?
•Is the[FW] terminal (or [RV]connected to
CM1(via switch,etc.)
•Verify the terminal functions for
C01-C06 are correct.
•Turn on Run Command
•Supply 24V to [FW] or [RV]
terminal, if configured.
(Terminal mode selection)
•Has the frequency setting for F01 been
set greater thanzero?
•Are the control circuit terminals
H, O, and L connected to the
potentiometer?
•Set the parameter for F01to a safe,
non-zero value.
•If the potentiometer is the frequency
setting source, verify voltage at
"O"
＞
0V
•Is the RS(reset) functionor FRS
(free-run stop)function on?
•Turn off the command(s)
Inverter outputs
U,V,W are
supplying
voltage.
•Is the motor load too heavy?
•Is the motor locked?
•Reduce load, and test the motor
independently.
The direction of the
motoris reversed
•Are the connections of output terminal
U, V, andW correct?
•Is the phase sequence of the motor
forward or reverse with respect to
U, V, and W?
•Make connections according to
the phase sequence of the motor.
In general: FWD=U-V-W, and
REV=U-W-V.
•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.
The motor speed
will not reach the
target frequency
(desired speed)
•If using the analog input, is
the current or voltage at"O"or"OI"?
•Check the wiring
•Check the potentiometer orsignal
generating device.
•Is the load too heavy?
•Reduce the load.
•Heavy loads activate the overload
restriction feature.
(reduces output as needed)
The rotation is
unstable
•Is the load fluctuation too great?
•Is the supply voltage unstable?
•Is the problem occurring at a particular
frequency?
•Increase the motor capacity
(both inverter and motor)
•Fix power supply problem.
•Change the output frequency
slightly, or use the jumpfrequency
setting to skip the problem
frequency.
The RPM of the motor
does not match
the inverter output
frequency setting
•Is the maximum frequency setting
A04 correct?
•Does the monitor function d01 display
the expected output frequency?
•Verify the V/F settings match
motor specifications
•Make sure all scaling is properly set
