Hitachi L100 Welding System User Manual


 
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.