CEBORA S.p.A.
17
3.302.089
31/05/02
Correct?
Correct?
3.3.8
- Irregular pilot arc starts, unstable pilot arc.
PLASMA GAS PRESSURE TEST.
q
Gas pressure in the torch plasma chamber is correct.
YES
NO
♦
Check for the presence of gas at the supply fitting (B), and make sure that the
pressure and air flow in the intake line comply with the specified values (see
Instructions Manual and Sales Catalogue).
♦
Make sure that the pressure regulator (E) and pressure gauge (F) are working
properly; replace if defective.
♦
Make sure there are no occlusions in the gas hoses of the power source.
♦
Make sure that solenoid valve (20) = open, during the pilot arc (see SOLENOID
VALVE (20) TEST, par.3.3.5).
PILOT ARC VOLTAGE TEST.
WARNING
FOR THIS TEST
DISCONNECT THE CONNECTOR J3
ON THE HF BOARD (22) TO
PREVENT HIGH FREQUENCY FROM BEING GENERATED.
q
HF board (22), connector J6-E and TP5 (gnd) = fig. 5.2.1, with start button pressed (open
circuit nozzle voltage, interrupted after approximately 300 msec., for missing pilot arc
current).
YES
NO
♦
Go to par. 3.3.7.
♦
Check the supply voltage of the power source. If it differs significantly from the rated values,
power the power source with a voltage as close as possible to the specified values (also see
Alarm signals, par. 3.4).
♦
Check connections between torch cable and HF board (22).
♦
Make sure the internal parts of the torch are properly insulated, including cables; if in doubt,
replace the entire torch.
♦
Check electrode, swirl ring and torch nozzle; replace if worn or damaged.
♦
Replace the panel (31) and/or power (35) boards.
