Lincoln Electric 718115 Spirit II 275 - Manual (Page 132)

Section 6: Maintenance &Troubleshooting Spirit II User’s Manual
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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.
Top View of Chopper
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.
If the proper DC voltage is present, the chopper is working properly.
TABLE 1
Chopper 1 Chopper 2 Chopper 3
3 Phase
AC
OCV
(DC)
3 Phase
AC
OCV
(DC)
3 Phase
AC
OCV
(DC)
Spirit II
400 Amp
255 370 255 370 255 370
Spirit II
275 Amp
225 325 225 325 N/A N/A
Spirit II
150 Amp
208 300 N/A N/A N/A N/A
Diode Bridge Terminals
Chopper PCB
J1 Plug