L100 Inverter
Troubleshooting
and Maintenance
6–3
Troubleshooting Tips
The table below lists typical symptoms and the corresponding solution(s).
Symptom/condition Probable Cause Solution
The motor
will not run.
The inverter
outputs [U], [V],
[W] are not
supplying
voltage.
• Is the frequency command source
A_01 parameter setting correct?
• Is the Run command source A_02
parameter setting correct?
• Make sure the parameter
setting A_01 is correct.
• Make sure the parameter
setting A_02 is correct.
• Is power being supplied to termi-
nals [L1], [L2], and [L3/N]? If so,
the POWER lamp should be ON.
• Check terminals [L1], [L2],
and [L3/N], then [U/T1],
[V/T2], and [W/T3].
• Turn ON the power supply
or check fuses.
• Is there an error code E X X
displayed?
• Press the Func. key and
determine the error type.
Eliminate the error cause,
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 [P24] (via switch,
etc.)
• Verify the terminal functions
for C_01 – C_05 are correct.
• Turn ON Run Command
enable.
• Supply 24V to [FW] or [RV]
terminal, if configured.
• Has the frequency setting for F_01
been set greater than zero?
• Are the control circuit terminals
[H], [O], and [L] connected to the
potentiometer?
• Set the parameter for F_01
to a safe, non-zero value.
• If the potentiometer is the
frequency setting source,
verify voltage at [O] > 0V.
• Is the RS (reset) function or 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? • Reduce load, and test the
motor independently.
The optional
remote operator
is used (SRW).
• Are the operational settings
between the remote operator and
the inverter unit correct?
• Check the operator type
setting.
The direction of the motor is
reversed.
• Are the connections of output
terminals [U/T1], [V/T2], and
[W/T3] correct?
• Is the phase sequence of the motor
forward or reverse with respect to
[U/T1], [V/T2], and [W/T3]?
• 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 F_04 properly set?
• Use terminal [FW] for
forward, and [RV] for
reverse.
• Set motor direction in F_04.
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