Hitachi SJ300-037HFE Welding System User Manual


 
SJ300 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
A001 parameter setting correct?
Is the Run command source A002
parameter setting correct?
Make sure the parameter
setting A001 is correct.
Make sure the parameter
setting A002 is correct.
Is power being supplied to terminals
[R], [S], and [T] ([L1], [L2], and
[L3])? If so, the POWER lamp should
be ON.
Check terminals [R], [S], and
[T] ([L1], [L2], and [L3]), then
[U], [V], and [W] ([T1], [T2],
and [T3]).
Turn ON the power supply or
check fuses.
Is there an error code
EXX.X
displayed?
Press the Func. key and deter-
mine 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 C001 - C008 are correct.
Turn ON Run command
enable.
Supply 24V to [FW] or [RV]
terminal, if configured.
Has the frequency setting for F001
been set greater than zero?
Are the control circuit terminals [H],
[O], and [L] connected to the potenti-
ometer?
Set the parameter for F001 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 or test the motor
independently of the load.
The direction of the motor is
reversed.
Are the connections of output termi-
nals [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 F004 properly set?
Use terminal [FW] for forward,
and [RV] for reverse.
Set motor direction in F004.