CEBORA S.p.A.
19
3.302.089
31/05/02
Correct?
Correct?
3.4
- Alarm signals.
3.4.1
- Yellow (G) and red (N) leds lit = temperature outside limits.
The power source delivers no current, but the fan continues running; we therefore recommend
leaving the power source powered to ensure rapid cooling.
This is reset automatically when the temperature returns within the allowed limits.
THERMOSTAT TEST.
q
Panel board (31), connector CN1, terminals 2 (+) - 3 (-) = 0 Vdc, contact closed, appropriate
temperature (approxi10 Vdc, contact open, temperature outside limits).
YES
NO
♦
Check the wiring between CN1 panel board (31) and the thermostat, located on
the dissipater of the power mosfet on the power board (35).
♦
Replace the thermostat or power board (35).
♦
Replace panel board (31).
♦
Make sure that the fan (15) is working properly (see par. 3.3.2).
♦
Make sure that air is flowing properly and that the aeration tunnel contains no dust or other
obstacles to cooling.
♦
Make sure that the working conditions comply with the specified values, especially observing
the “duty cycle”.
♦
Replace panel (31) and/or power (35) boards.
3.4.2
- Red leds (L) and (N) lit = low gas pressure.
The power source delivers no current, but remains powered.
This is automatically reset when the pressure returns within the allowed limits, but to re-start
the pilot arc you must give a new start command from the torch button.
PRESSURE SWITCH (32) TEST.
q
Panel board (31), connector CN1, terminals 1 (+) - 4 (-) = 0 Vdc, contact closed, pressure OK
(+10 Vdc, contact open, pressure low).
YES
NO
♦
Check the wiring between CN1 panel board (31) and pressure switch (32).
♦
Make sure that gas is present at the intake fitting (B) and that the pressure in the
supply line meets specifications (see Instructions Manual).
♦
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.
♦
Replace the pressure switch (32).
♦
Replace panel board (31).
♦
Replace panel board (31).
