No Load Output Voltage Incorrect; Difficulty Striking The Arc, The Arc Turns Off Immediately After Striking; In Mig Mode, Welding Quality Is Not Satisfactory - Cebora KINGSTAR 400TS Manual De Servicio

CEBORA S.p.A.
TESTING RLEM ON MICROSWITCH BOARD (37)
□ With the power source off, temporarily disconnect J22 from microswitch board (37)
and check the resistance between terminals 7 - 4 of J22 on microswitch board (37) =
17 ohm approximately for Item No 372 and 27 ohm approximately for Item No 374.

3.5.9 No load output voltage incorrect

TESTING NO-LOAD OUTPUT VOLTAGE
□ Output terminal L(-) and output terminal K(+) on power source = +71 Vdc
approximately for Item No 372 +80 Vdc for Item No 374 in MIG and TIG with start
button pressed, in MMA with selection of MMA process alone
See section 3.5.8

3.5.10 Difficulty striking the arc, the arc turns off immediately after striking

3.5.11 In MIG mode, welding quality is not satisfactory.

□ To facilitate striking and welding, the working programs include the functions "Arc
length", "Soft start" and "Impedance", available based on the process selected and
adjustable by means of controls on the control panel (see Instruction Manual).
□ In MIG, parameters included in synergic MIG programs are obtained based on
experience. Conditions may be optimum for some operators while others may need
to make slight changes.
For this reason, the ratio between wire speed, welding current and arc length can be
adjusted in all MIG processes (see Instruction Manual).
In all these situations, if it is difficult to strike an arc or weld following careful
adjustment of the parameters available on the control panel, it is advisable to:
□ check that the parameters selected reflect the actual current welding conditions;
□ check how the settings work by performing some welding tests using different
parameter set-ups or swapping the working program for a similar program, if
available, with the aim of identifying differences stemming from the different set-ups
in practice on the weld. If the changes do not reflect the set-up changes or problems
are encountered in parameter selection, check compatibility of the software program
version in the welding system and if necessary update by running the "Firmware
update" procedure (see section 2.6);
□ ensure that the power source is operating correctly by performing the tests described
in preceding sections, check that enough gas is emerging;
□ check the compatibility of the elements being used (earth cable, torch, type of nozzle,
wire type and diameter, gas type, etc.) with the type of welding being done;
□ check for wear on the torch and its components, and replace if necessary;
□ replace secondary board (37) and/or master board (70) and/or motor control board
(222).
3301045
NO
Correct?
YE
♦ Normal operation.
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17/09/2019