Troubleshooting Tips - Hyundai N700E Instruction Manual

N700E INSTRUCTION MANUAL
`

7. Troubleshooting Tips

Symptom/condition
The inverter
outputs U,V
and W are not
The
supplying
motor
voltage.
will not
move
Inverter outputs
U,V,W are
supplying
voltage.
The direction of the
motor is reversed
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
• Is the frequency command source A01
parameter setting Correct?
•Is the Run command source A02
parameter setting correct?
• Is power being supplied to terminals
R, S and T?
If so, the power lamp should be on.
• Is there an error code E□□displayed?
• 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.)
• Has the frequency setting for F01 been
set greater than zero?
• Are the control circuit terminals
H, O, and L connected to the
potentiometer?
• Is the RS(reset) function or FRS
(free-run stop) function on?
• Is the motor load too heavy?
• Is the motor locked?
• 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?
• If using the analog input, is
the current or voltage at "O" or "OI"?
• 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?
• Make sure the parameter A01
setting correct?
• Make sure the parameter A02
setting correct?
• Check terminals R, S and T then
U, V, and W
• Turn on the power supply or check
fuses.
• Press the Func key and determine
the error type.
Then clear the error(Reset).
• 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)
• Set the parameter for F01 to a safe,
non-zero value.
• If the potentiometer is the frequency
setting source, verify voltage at
"O" ＞0V
• Turn off the command(s)
• Reduce load, and test the motor
independently.
• Make connections according to
the phase sequence of the motor.
In general : FWD=U-V-W, and
• Use terminal [FW] for [RV]
is reverse.
• Set motor direction in F04.
• 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
7-1
Countermeasure
REV=U-W-V.