And shunt connections. see figure f.21, Troubleshooting & repair – Lincoln Electric INVERTEC V250-S User Manual
Page 99
F-67
TROUBLESHOOTING & REPAIR
F-67
INVERTEC V250-S
6. Disconnect and clear the shunt
sensing leads from the control board
(plug J4).
7. Disconnect the thermostat leads
from the thermostat mounted on the
shunt assembly.
8. With the 3/4” wrench remove the
shunt assembly from the negative
output terminal. Take note of the by-
pass connection on the negative ter-
minal. Clear the shunt to allow
access to the main transformer and
lead connections. Cut any neces-
sary cable ties.
9. With the 3/4” wrench remove the two
secondary leads from the positive
output terminal. Take note of the by-
pass connection on the positive ter-
minal.
10. Locate and cut the necessary wire
ties and slide the sleeving from the
four transformer secondary and
reactor lead splices.
11. With slot head screwdriver and 3/8”
nut-driver remove the two reactor
leads from output rectifier leads.
Label the leads for reassembly.
12. Using the 7/16” wrench remove the
secondary leads from the output
rectifier leads.
Label the leads and note washer
and lead placement for reassembly.
13. With 3/8” wrench remove the two
screws mounting the transformer
assembly to the base of the
machine. See
The machine will have to be tilted
on its side to gain access to the
bottom of the unit.
MAIN TRANSFORMER REMOVAL AND REPLACEMENT
(MACHINE CODES BELOW 10150)
(continued)
MAIN TRANSFORMER
SECONDARY LEADS
Figure F.21 Main Transformer Left Side