Weak Transfer Arc That Shuts Off As Soon As Cutting Begins; Post-Gas Does Not Take Place Upon Releasing The Start Button And After Cutting - Cebora PLASMA PROF 162 Service Manual

CEBORA S.p.A.

3.3.10 - Weak transfer arc that shuts off as soon as cutting begins.

NOZZLE REMOTE SWITCH OPENING TEST.
Resistor terminals (74) = 0 VDC, with transfer arc (> 25 VDC with pilot arc).
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♦ Check voltage on the remote switch coil (18): if 0 VAC replace remote switch
(18); if 27 VAC replace board (62).
♦ See "Transfer arc reference test" and "Transfer arc solenoid valve test" par. 3.3.9.

3.3.11 - Post-gas does not take place upon releasing the start button and after cutting.

POST-GAS TEST.
Solenoid valve terminals (29), EL1 (terminals 7 – 8 of J12 control board (62)), or EL2
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(terminals 5 - 6 of J12 control board (62) = 27 VAC during pilot arc, transfer arc and post-
gas stages. Selection of the solenoid valve depends on the type of torch.
(EL3 = 27 VAC only during the transfer arc phase).
♦ Check the wiring between the solenoid valves (29) EL1, EL2 and EL3 and
connector J12 on board (62).
♦ Replace board (62).
♦ See "Pilot arc solenoid valve test" par. 3.3.5. and "Transfer arc solenoid valve test" par.
3.3.9..
3.302.002
Correct?
YES
NO
Correct?
YES
NO
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03/08/00