Lincoln Electric Idealarc DC600 9773MSP Service Manual page 58

TROUBLESHOOTING & REPAIR
MAIN TRANSFORMER (T1) VOLTAGE TEST
L3
L2
L1
FIGURE F.3 - Input Contactor, Reconnect Panel, and Primary Leads to
Main Transformer Locations
TEST PROCEDURE
1. Set ON/OFF PUSHBUTTON to
OFF
2. Disconnect main AC input power
from the machine.
3. Inspect the Input
Reconnect Panel, and primary
leads to the Main Transformer for
loose or faulty connections. See
Figure F.3.
a. Confirm that the Reconnect
Panel is connected properly for
the three-phase main AC input
power supplied to the machine.
See the Reconnect Panel
Connection Diagram located
on the inside of the Input Box
Assembly Access Door.
T3
T2
T1
4. Connect main AC input power to
the machine.
5. Set the ON/OFF PUSHBUTTON to
ON.
Contactor,
a. Make sure the Input Contact
(CR1) energizes.
runs.
6. Test with an AC voltmeter for prop-
er main AC input voltage to the line
side of the Input Contactor (CR1).
See wiring diagram.
a. L1 to L2.
b. L2 to L3.
c. L1 to L3.
F-17
The fan
IDEALARC DC-600