3
NOTE: the circuit 48 is powered on terminal CN2 for machines with a V 240 AC power sup-
ply, and on terminal CN3 for machines with a V 220 AC power supply.
POSSIBLE ERRORS - TROUBLESHOOTING
Limited current distributed.
Probable causes: Remedies:
1) defective diode or diodes on the rectifier 49. a) replace the rectifier.
2) incorrect connections on the torch 45 or a) check the connections on the torch and
grounding cable 37. grounding cable.
3) defective welding voltage regulator selector a) replace the selector switch.
switch 47.
4) broken connections on the outputs from the a) restore the connection.
power transformer 32.
Excessive metal sprays during welding.
Probable causes: Remedies:
1) welding parameters incorrectly set a) find the appropriate parameters by
adjusting the selector switch 47 and
wire advancement speed potentiome-
ter.
2) welding wire moves forward irregularly a) See paragraph 6.3 of the instruction
manual 3.300.614.
3) grounding cable incorrectly connected a) make sure the connections are correct.
The relais LR1 does not close when the torch trigger is pressed.
Probable causes: Remedies:
1) defective torch trigger 45. a) make sure the trigger and its connec-
tions are in good working order
2) defective circuit 48 a) replace it.
NOTES:
always use original CEBORA spare parts.
After every repair job, all safety tests must be carried out as described in paragraph 6.1.3 of
the standard IEC 974.1.
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