Troubleshooting Tips

The table below lists typical symptoms and the corresponding solution(s).
Symptom/condition ProbableCause Solution
xIs the frequency command source
A001 parameter setting correct?
xIs the Run command source A002
parameter setting correct?
xMake sure the parameter
setting A001 is correct
xMake sure the parameter
setting A002 is correct
xIs power being supplied to terminals
[L1],[L2], and [L3/N]? If so, the
POWER lamp should be ON.
xCheck terminals [L1],[L2],
and[L3/N], then [U/T1],
[V/T2], and [W/T3].
xTurn ON the power supply or
check fuses.
xIs there an error code
E X X
displayed?
xPress the Func. key and
determine the error type.
Eliminate the error cause,
then clear the error (Reset).
xAre the signals to the intelligent
input terminals correct?
xIs the Run Command active?
xIs the [FW] terminal (or[RV])
connected to [PCS](via switch, etc.)
xVerify the terminal functions
for C001–C005 are correct.
xTurn ON Run Command
enable.
xSupply 24V to [FW] or [RV]
terminal, if configured.
xHas the frequency setting for F001
been set greater than zero?
xAre the control circuit terminals
[H],[O], and [L] connected to the
potentiometer?
xSet the parameter for F001 to
a safe, non-zero value.
xIf the potentiometer is the
frequency setting source,
verify voltage at [O] > 0V.
The inverter
outputs[U],[V],
[W] are not
supplying
voltage
xIs the RS (reset) function or FRS
(free-run stop) function ON?
xTurn OFF the command(s)
Inverter
outputs[U],
[V],[W] are
supplying
voltage.
xIs the motor load too heavy? xReduce the load, and test the
motor independently.
The motor
will not run
The optional
remote
operator is
used(SRW).
xAre the operational settings
between the remote operator and
the inverter unit correct?
xCheck the operator type
setting.
xAre the connections of output
terminals[U/T1],[V/T2], and [W/T3]
correct?
xIs the phase sequence of the motor
forward or reverse with respect to
[U/T1],[V/T2], and [W/T3]?
xMake 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
xAre the control terminals [FW] and
[RV] wired correctly?
xIs parameter F004 properly set?
xUse terminal [FW] for
forward, and [RV] for reverse.
xSet motor direction in F004.

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Troubleshooting and
Maintenance
6 3
Troubleshooting and
Maintenance