Gas Leaks From The Torch, Pilot Arc Does Not Start; Irregular Pilot Arc Striking, Unstable Pilot Arc; Plasma Gas Pressure Test - Cebora 337 Manual De Servicio

CEBORA S.p.A.

4.5 Gas leaks from the torch, pilot arc does not start

Double red wire connection to FASTON connector M1 of the diodes board (32)
inserted correctly
Check the continuity between terminals 5 and 6
of the torch central adapter (61) with double red
wire and female FASTON connector end for
FASTON connector M1 of the diodes board (32);
Check the connections between connector J4 of
the diodes board (32) and connector J11 of the
control board (48);
Make sure that IGBT Q1 (xx) fixed on the diodes
dissipater (39) is intact - SEE PAR.8-: if
unserviceable, replace IGBT Q1 (xx) and diodes
board (32);
Make sure that the ISOTOP diodes modules (35)
that form the output rectifier bridge are intact -
SEE PAR.9-: If unserviceable, replace both even
if only one module is faulty;
Make sure that the IGTB modules of the inverter
full bridge are intact - SEE PAR.8-. If
unserviceable, replace both even if only one
module is faulty and replace control board (48);

4.6 Irregular pilot arc striking, unstable pilot arc

PLASMA GAS PRESSURE TEST

Plasma gas setting correct for installed torch.

Make sure that the torch (78) is correctly
assembled;
Check the torch central adapter (61) and torch
cable; replace if worn or damaged.
Check the electrode, swirl ring and torch nozzle;
replace if worn or damaged.
Make sure that the internal torch parts and
cables are properly isolated; replace the
complete torch, if necessary.
Replace measurement board (32) and/or control
board (48);
3302336-B
YES
Correct?
Insert the red wire connection into connector
M1 of the diodes board (32);
YES
Correct?
Check the presence of the gas at the inlet
fitting (C) and that the pressure and flow rate
in the intake conduit meet the specification
values (see Instruction Manual);
Make sure that the pressure regulator (D) is
working properly;
Make sure that the threaded part of the air
fitting (C) inserted in the pressure regulator
(D) is no more than 6 - 8 mm (1/4" - 5/16")
long, to avoid any possible malfunction of
the regulator (D).
Make sure there are no occlusions in the gas
hoses of the power source.
Check the working order of solenoid valve
NO
NO
57
20/12/2019