CEBORA S.p.A.
17
3.302.155
22/01/04
3.4
- Alarm signals.
3.4.1
- Led (C) lit = high temperature signal, or open wire coil cover.
This alarm indicates that the temperature of the transformer (30) has risen beyond the allowed
limits, or the safety cover of the wire feeder unit is open.
In the former instance we recommend not to shut off the power source, to keep the fan
running and thus allow rapid cooling. Normal operation is restored automatically as soon as the
temperature returns within the allowed limits.
If the alarm occurs repeatedly, we recommend that you:
−
Make sure the fan (26) is operating correctly.
−
Make sure that air is flowing properly and that there is no dust or other obstacles to cooling.
−
Make sure that the working conditions comply with the specified values, especially
observing the “duty cycle”.
−
Make sure that the thermostat mounted on the transformer (30) is properly assembled and
functioning correctly; its contact must be closed at ambient temperature.
−
Make sure the safety switch (59) and the wire feed unit guard are in good condition and
properly mounted. With the guard closed the contact of switch (59) must be closed. If
incorrectly positioned, correct the position; replace if defective.
−
Make sure that the voltage on terminals 7 (+) and 8 (-) of J1, control board (42) = 0 Vac
(contacts closed) with temperature correct and wire feed unit guard closed; (+35 Vdc approx.
with thermostat on transformer (30) or wire feed unit guard open). If correct, replace control
board (42). If incorrect, check the wiring between terminals 7 and 8 of J1 control board (42),
thermostat on the transformer (30), switch (59) on the guard of the wire feed unit.
−
Replace the control board (42).
