Lincoln Electric RED-D-ARC DX450 Service Manual page 94

F-50
FIGURE F.8 – RECEPTACLE LEAD LOCATIONS (TYPICAL)
CONTACTOR
CONTROL
REMOTE
CONTROL
2 TIMES THRU FERRITE
LEADS 75A, 76A, & 77A
TEST PROCEDURE
1. Perform the Case Cover Removal procedure.
NOTE: Voltage tests of the 120 and 120/240 VAC
receptacles can be performed by placing
the meter probes directly into the appropri-
ate connection slots in the front of the
receptacles rather than testing at the lead
connections described below. If the meter
probes are not long enough to make con-
tact with the conductors inside the recepta-
cles, test pins may be used.
To test the 120 VAC auxiliary winding:
1. Connect the volt/ohmmeter probes to either
120 VAC receptacle as follows.
2. For the upper receptacle, place the probes
directly into receptacle, or connect to leads
#3D and #5A. See Wiring Diagram.
For the lower receptacle, place the probes
directly into the receptacle, or connect to leads
#6E and 5A. See Wiring Diagram.
TROUBLESHOOTING AND REPAIR
STATOR VOLTAGE TESTS (continued)
AMPHENOL 1
C
B
D
L
K
E
M
N
F
G
H
KEY
L4
GROUND
A
J
I
40 VAC FOR WIRE FEEDER
21 WORK SENSE
3. Start the engine and run it at high idle (1810
RPM).
4. Check the AC voltage reading. It should read
between 115 and 132 VAC.
To test the 240 VAC auxiliary winding (Single
Phase):
1. Connect the meter probes to leads #6D and
#3C where they connect to the 120/240VAC
receptacle, or insert the probes into the 240
VAC connection slots in the front of the recep-
tacle. See Wiring Diagram.
2. Start the engine and run it at high idle (1810
RPM).
3. Check the AC voltage reading. It should read
between 230 and 264 VAC.
4. If these voltage readings are not within the
specified limits, check for tripped or defective
circuit breakers, loose connections, or broken
wires between the test points and the stator
windings. If there are no wiring problems, and
the circuit breakers are not tripped or defec-
tive, the stator may be defective.
DX450
120 VAC FOR WIRE FEEDER
F-50