Lincoln Electric SVM188-A Service Manual page 62

F-22
MAIN TRANSFORMER VOLTAGE TEST (continued)
FIGURE F.8 - INPUT CONTACTOR AND RECONNECT PANEL
PROCEDURE
1. Disconnect the main input power from the DC-600.
2. Inspect the input contactor, reconnect panel and
primary leads to the main transformer for loose or
faulty connections. See Figure F.8.
3. Confirm that the reconnect panel is configured cor-
rectly for the three-phase AC input power supplied
to the DC-600. See the connection diagram locat-
ed on the inside of the input box assembly.
4. Connect the correct AC three-phase input power to
the DC-600.
WARNING
ELECTRIC SHOCK
• Do not touch electrically hot parts.
5. Turn the power switch (SW1) to the ON position.
TROUBLESHOOTING AND REPAIR
L3 T3
L2 T2
L1 T1
can kill.
DC-600
6. Make sure the input contactor (CR1) energizes.
7. Test with an AC voltmeter for the proper main AC
input voltages applied to the line side of the input
contactor (CR1). See Figure F.8 .
a. L1 to L2
b. L2 to L3
c. L1 to L3
• If the voltages are not correct at the line side of
the input contactor, check the input fuses and
leads.
8. Test with an AC voltmeter for the proper AC input
voltages at the output side of the input contactor
(CR1). See Figure F.8.
a. T1 to T2
b. T2 to T3
c. T1 to T3
• If the correct voltages are not present, perform
the Input Contactor Test.
F-22