No Gas Flows From The Torch - Cebora 961 Service Manual

CEBORA S.p.A.

3.3.3 - No gas flows from the torch.

PILOT ARC EL1 (7) SOLENOID VALVE TEST.
Solenoid valve EL1 (7) terminals = approximately 230 Vac, with torch button pressed. The
solenoid valve opening time also depends on the post-gas time.
♦ Check the wiring between solenoid valve EL1 (7) and terminals 6 and 12 of J4 on
control board (4).
♦ With power source off, check the resistance between terminals of solenoid valve
EL1 (7) = approximately 2500 ohm. If 0 ohm (short-circuit), replace solenoid
valve EL1 (7) and control board (4).
♦ Perform the CONTROL BOARD (4) POWER SUPPLY TEST, par. 3.3.1.
♦ Check the wired bridge between terminals 1 and 2 of J3 on control board (4). All
auxiliary services, contactors and solenoid valves, are connected under such wired
bridge and fuse F1.
♦ Replace control board (4).
♦ With power source off, check the resistance between the terminals of solenoid valve EL1 (7)
= approximately 2500 ohm. If >Mohm (winding broken) replace solenoid valve EL1 (7).
♦ Make sure there are no occlusions in the gas hoses of the power source.
♦ Check the presence of the gas at the inlet fitting (B) and that the pressure and flow rate in the
intake conduit meet the specification values (see Instruction Manual).
♦ Make sure that the pressure regulator (E) and pressure gauge (F) are working properly.
♦ Make sure that the air fitting (B) inserted in the pressure regulator (E) has a threaded part no
longer than 6 - 8 mm (1/4" - 5/16"), to avoid a possible regulator (E) malfunction.
♦ Replace solenoid valve EL1 (7).
3.302.170
Correct?
YES
NO
11
06/07/04