Lincoln Electric RED-D-ARC DX450 Service Manual page 95

F-51
To test the 240 VAC winding (3-phase):
1. Connect the meter probes to leads 4A and 3B
where they connect to the 240 VAC receptacle,
or insert the meter probes into the receptacle.
See the 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. Repeat steps 2 & 3 with the meter probes con-
nected to leads 6C and 4A.
Diagram. The reading should be between 230
and 264 VAC.
5. 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.
TROUBLESHOOTING AND REPAIR
STATOR VOLTAGE TESTS (continued)
See Wiring
To test the 120 VAC wire feeder supply:
NOTE: The wire feeder AC voltage supply tests
require that the meter probes be inserted
into the Amphenol connection cavities.
Care should be taken to avoid damaging or
expanding the terminals when inserting the
probes.
NOTE: The 120 VAC power supplied to the 14 pin
Amphenol connector originates from the
same winding that supplies the 120 VAC
receptacles. If the machine has previously
passed 120VAC auxiliary winding test, this
test can only reveal problems in connec-
tions or components
Amphenol and the stator winding.
Wiring Diagram.
1. Connect the voltmeter probes to pins "A" (lead
#32) and "J" (lead #31) of the 14 pin Amphenol.
See Figure F.8 and Wiring Diagram.
2. Start the engine and run it at high idle (1810
RPM).
3. The AC voltage reading should be between
115 and 132 VAC.
4. If these voltage readings are not within specifi-
cations, check for a tripped or defective circuit
breaker, faulty connections, or broken wires
between the test points and the stator wind-
ings. See Wiring Diagram.
DX450
F-51
between the
See