Lincoln Electric BURNY KALIBURN Spirit II 275 User Manual page 112

Section 6: Maintenance &Troubleshooting
8. With a start signal applied, check the three phase voltage input to each chopper at
the diode bridge terminals (three screws on the left side of each chopper). Refer to
TABLE 1 for the proper three phase AC voltage.
Note that the system will only energize for approximately two seconds each
time a start signal is applied.
If the voltage is not present, check for primary voltage on the main contactor
(CON 1) and on the primary side of the power transformer.
Diode Bridge Terminals
9. With a start signal applied, check for the proper DC voltage (refer to TABLE 1) at the
output terminal block between Electrode and Work, which is located on the left side
of the unit.
If the proper DC voltage is present, the chopper is working properly.
Spirit II
400 Amp
Spirit II
275 Amp
Spirit II
150 Amp
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Chopper PCB
J1 Plug
TABLE 1
Chopper 1
3 Phase OCV 3 Phase
AC (DC)
255 370
225 325
208 300
Top View of Chopper
Chopper 2
OCV 3 Phase
AC (DC) AC
255 370 255
225 325 N/A
N/A N/A N/A
6-12
Spirit II User's Manual
D2 (Green LED) is
under J1 Plug
Chopper 3
OCV
(DC)
370
N/A
N/A