SJ100 Inverter
T
roub
leshooting
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_06 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.
