Lamp (G) (39) Flashing (Two Flashes With One Second Pause) = Start Button Pressed During Power Source Start-Up - Cebora 961 Service Manual

CEBORA S.p.A.
3.4.3 - Lamp (G) (39) flashing (two flashes with one second pause) = start button pressed
during power source start-up.
If at the start up the start button on the torch is detected closed, the power source remains in
block with contactors TLP (32) and TLM (32) opened, without output voltage and with lamp (G)
(39) flashing.
The reset is automatic when the start button is released.
For the problem analysis perform the START COMMAND TEST, par. 3.3.2.
3.4.4 - Lamp (L) (39) lit, with fix light = low gas pressure.
With this alarm the power source remains in block with contactors TLP (32) and TLM (32)
opened, without output voltage.
This is automatically reset when the pressure returns within the allowed limits, but to restart
pilot arc you need a new start command by torch start button.
To analyze the problem perform the following test.
PRESSURE SWITCH (8) TEST.
Control board (4), connector J6, terminals 3 and 5 (NC contact) = 0 Vac (contact closed), with
low pressure (<3.2 bar); 24 Vac (contact opened), with suitable pressure.
Control board (4), connector J6, terminals 3 and 4 (NO contact) = 24 Vac (contact opened),
with low pressure (<3.2 bar); 0 Vac (contact closed), with suitable pressure.
♦ Check the wiring between pressure switch (8) and terminals 3, 4 and 5 of J6 on
control board (4).
♦ Check for the presence of gas at the intake fitting (B) and make sure the pressure
and flow rate in the in feed line meet specifications (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
malfunction of the regulator (E).
♦ Make sure there are no occlusions in the gas hoses of the power source.
♦ Replace the pressure switch (8).
♦ Replace the control board (4).
♦ Proper operation of the pressure switch (8).
♦ Replace control board (4).
3.302.170
Correct?
YES
NO
17
06/07/04