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Troubleshooting Tips
The table below lists typical symptoms and the corresponding solution(s).
Symptom/condition Probable Cause Solution
x Is the frequency command source
A001 parameter setting correct?
x Is the Run command source A002
parameter setting correct?
x Make sure the parameter
setting A001 is correct
x Make sure the parameter
setting A002 is correct
x Is power being supplied to terminals
[L1], [L2], and [L3/N]? If so, the
POWER lamp should be ON.
x Check terminals [L1], [L2],
and [L3/N], then [U/T1],
[V/T2], and [W/T3].
x Turn ON the power supply or
check fuses.
x Is there an error code
E X X
displayed?
x Press the Func. key and
determine the error type.
Eliminate the error cause,
then clear the error (Reset).
x Are the signals to the intelligent
input terminals correct?
x Is the Run Command active?
x Is the [FW] terminal (or [RV])
connected to [PCS](via switch, etc.)
x Verify the terminal functions
for C001–C005 are correct.
x Turn ON Run Command
enable.
x Supply 24V to [FW] or [RV]
terminal, if configured.
x Has the frequency setting for F001
been set greater than zero?
x Are the control circuit terminals
[H], [O], and [L] connected to the
potentiometer?
x Set the parameter for F001 to
a safe, non-zero value.
x If the potentiometer is the
frequency setting source,
verify voltage at [O] > 0V.
The inverter
outputs [U], [V],
[W] are not
supplying
voltage
x Is the RS (reset) function or FRS
(free-run stop) function ON?
x Turn OFF the command(s)
Inverter
outputs [U],
[V], [W] are
supplying
voltage.
x Is the motor load too heavy? x Reduce the load, and test the
motor independently.
The motor
will not run
The optional
remote
operator is
used (SRW).
x Are the operational settings
between the remote operator and
the inverter unit correct?
x Check the operator type
setting.
x Are the connections of output
terminals [U/T1],[V/T2], and [W/T3]
correct?
x Is the phase sequence of the motor
forward or reverse with respect to
[U/T1], [V/T2], and [W/T3]?
x Make connections according to
the phase sequence of the
motor. In general:
FWD = U-V-W, and REV=U-
W-V.
The direction of the motor is
reversed
x Are the control terminals [FW] and
[RV] wired correctly?
x Is parameter F004 properly set?
x Use terminal [FW] for
forward, and [RV] for reverse.
x Set motor direction in F004.
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Troubleshooting and
Maintenance
6 3
Troubleshooting and
Maintenance