Arc Is Difficult To Strike, The Arc Shuts Off Immediately After Striking; Welding Quality Is Not Satisfactory, The Wire Speed Is Not Suited To The Output Current; When The Start Button Is Released, The Wire Sticks To The Workpiece (Ineffective Motor Braking) - Cebora SYNSTAR 200 T Manual De Servicio

Service Functions menu and save the selections;
− rotate knob B to select the maximum output current
(200 A on art. 323, 270 A on art. 324).
□ Output terminals C and D on power source = values as
shown in the table, with start button pressed.
NO Correct?
♦ Regular operation.
INVERTER POWER SUPPLY TEST.
□ Power board (45), connector J1, terminals 4(+) - 1(-)
voltage = +530 Vdc approx., with power source on
resistive load, in the table conditions (Vdc on DC-
capacitors with power source on resistive load).
YES Correct?
♦ Perform tests of par. 3.3.1 with particular at-
tention to the POWER SUPPLY TEST.
♦ Replace power board (45).
■ Check the wiring between terminals VITE1 and
VITE2 on power board (45), polarity reverser (on art.
323) and power source output terminals C and D. If
you find loose connections, tighten and replace any
damaged components.
■ Check the wiring between J4 INV board on power
board (45) and J1 panel board (48).
■ Check correct fixing and connections cleaning of the
INV board on power board (45) J6 (J8 on art. 324) con-
nector.
■ Check condition of the inverter power components
(U1, U2, U3, U4, etc.) on power board (45).
■ Replace power (45) and/or panel (48) boards.
3302317/A
YES
NO
3.3.10 Arc is difficult to strike, the arc shuts off im-
mediately after striking.
3.3.11 Welding quality is not satisfactory, the wire
speed is not suited to the output current.
"Soft Start" and "Inductance" functions, available in the
Service Functions menu (see Instructions Manual), can
assist welding start.
The parameters entered in the programs (synergic curves)
are determined based on experience, thus some operators
may find conditions to be optimal while others may need
to make slight changes.
For this reason the operators have the option of changing
the ratio between wire speed and welding current (see In-
structions Manual).
In the situation where there are problems striking the arc
or welding difficulties despite careful management of the
available parameters on the control panel, we recommend:
− make sure the parameters selected reflect the actual
current welding conditions;
− make sure the adjustments are working properly, by car-
rying out welding tests with different parameter settings
or switching the working program with a similar one, if
available, to determine the practical welding differences
with the different settings. If changes of the parameters
do not correspond to welding differences or if you en-
counter problems in selecting the parameters, upgrade
the power source firmware to the last version, available
on the Cebora Web site (see par. 2.4);
− make sure the power source is working properly, per-
forming if necessary the "open circuit operation" tests
in par. 3.3.8 and "operation on resistive load" tests in
par. 3.3.9;
− check the compatibility of the components being used
(torch, type of contact tip, wire type and diameter, type
of gas, etc.) with the type of welding being carried out;
− check the wear status of the torch and its components,
replacing them if necessary.
3.3.12 When the start button is released, the wire
sticks to the workpiece (ineffective motor
braking).
To maximize the MIG end welding, the work programs
include the "Burn-Back" function, adjustable from the
control panel (see Instructions Manual). In case of difficulty at the end of welding:
− make sure that the wire feeder motor brakes properly,
performing, if necessary, the WIRE FEEDER MO-
TOR (25) BRAKING TEST, described below;
− make sure that the "Burn-Back" function adjustment is
working, by carrying out welding tests with different
parameter settings or switching the working program
with a similar one, if available. If you encounter
EN
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