Selco GENESIS 145, Руководство по ремонту

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10.4 - OPEN CIRCUIT VOLTAGE
OPERATION FLOW SIGNAL
The welding machine has a no-load voltage of about 50Vdc + 5Vdc. If this is not the case, the problem could lie in the feedback control.
BLOCK DIAGRAM
Fault Possible problem Suggestions
Incorrect no-load voltage Lack of feedback signal
Slightly high no-load voltage
Zero no-load voltage
If the control system does not read the ou-
tput voltage, the no-load voltage rises consi-
derably (about 100V). In this case check that
the red wire which reads the positive output
voltage, connected to terminal Vout+, is
properly connected at the front.
In this case, the SHUNT and output voltage
measurement connectors could be slightly
splayed or oxidized.
Clean them gently and secure them to the
relative FASTON terminals.
Check the power board 15.14.44 accor-
ding to the procedure on page 5.