Service manual

CEBORA S.p.A. 11
3.3.4 - In TIG, the start button produces no effect.
START COMMAND TEST.
Correct?
 Power board (29), connector CN1, terminals 4(+) and 8(-) = 0 Vdc (start), with torch button
pressed (+5 Vdc with button released).
YES
NO
♦ Check the wiring between CN1 power board (29) and CN1 panel board (26).
♦ Make sure the torch connector in correctly inserted in connector (I).
♦ Check cable and start button on the torch. If defective, replace.
♦ Replace panel (26) and/or power (29) boards.
♦ Replace the power board (29).
3.3.5 - In TIG, no gas flows from the torch.
SOLENOID VALVE TEST.
Correct?
 Solenoid valve (11) terminals = 230 Vac with torch button pressed (the duration of the
solenoid valve opening also depends on the post-gas parameters set).
NO
YES
♦ Check the presence of gas at the power supply fitting (R) provided on the rear
panel, and make sure that the pressure and air flow, in the intake line, comply with
the specified values (see specifications in the Instruction Manual).
♦ Make sure there are no occlusions in the gas hoses of the power source.
♦ Make sure, with power source off and disconnected from the mains, the resistance
on solenoid valve (11) terminals = 2500 ohm. If >Mohm (winding broken) replace
solenoid valve (11).
♦ Replace solenoid valve (11).
♦ Check wiring between terminals EV1 and EV2 of power board (29) and solenoid valve (11).
♦ Make sure start command operation, performing the START COMMAND TEST par. 3.3.4 if
necessary.
♦ Make sure, with power source off and disconnected from the mains, the resistance on solenoid
valve (11) terminals = 2500 ohm. If 0 ohm (short-circuit), replace solenoid valve (11) and
check efficiency of the relè RL2 on power board (29), and replace it if necessary.
♦ Replace power board (29).
3.302.212 12/01/06