Troubleshooting & repair – Lincoln Electric INVERTEC V250-S User Manual
Page 104
F-72
TROUBLESHOOTING & REPAIR
F-72
INVERTEC V250-S
PROCEDURE
1. Remove input power to the V250-S.
Procedure detailed in Maintenance
Section.
3. Locate main transformer and associ-
ated primary leads. See Figure
F.23.
4. Disconnect transformer primary
leads #201, #204, #205 and #208
from the power board.
NOTE: Leads #204 and #205 will
have to be removed from the T3 cur-
rent transformer. Cut any necessary
cable ties. Be sure to note the
direction that the leads are thread-
ed through the current trans-
former. Upon reassembly the leads
must be threaded correctly.
5. Locate main transformer and associ-
ated secondary leads, reactor leads,
and shunt connections. See
6. Disconnect and clear the shunt
sensing leads from the control board
(plug J4).
MAIN TRANSFORMER REMOVAL AND REPLACEMENT
(MACHINE CODES ABOVE 10150)
(continued)
201
204
205
208
T3 CURRENT TRANSFORMER
MAIN TRANSFORMER
Figure F.23 Main Transformer Right Side