Replacing Power Cord In Non-Ce Models; Measuring Input Capacitor Voltage - Miller Maxstar 152 Owner's Manual

5-2. Replacing Power Cord In Non-CE Models

5-3. Measuring Input Capacitor Voltage

2
Tools Needed:
5/16 in
OM-172 200 Page 18
6
3
4
5
2
1
Y Significant DC voltage can remain
on capacitor after unit is Off. Always
check capacitor as shown to be
sure it has discharged before work-
ing on unit.
Y Turn Off welding power
source, disconnect input
power, and check voltage on
input capacitor according to
Section 5-3
proceeding.
Have only qualified persons carry
out this procedure.
Remove wrapper.
1 Input Terminal Block
2 Input Conductors
3 Grounding Conductor
Disconnect input conductors and
grounding conductor from input ter-
minal block.
4 Strain Relief Connector
Loosen strain relief connector and
remove existing power cord.
Y Be sure conductor rating of
new cord complies with na-
tional, state, and local elec-
trical codes.
Strip 3/8 in (10 mm) insulation off all
conductors.
Insert conductors through strain
relief.
5 Line Terminals
6 Ground Terminal
Connect grounding conductor to
ground terminal first.
Connect input conductors to line
terminals. Terminals are identified
L1, L2, or L3 on terminal block.
Reinstall wrapper.
Ref. ST-801 603 / Ref. ST-801 300-A
Turn Off welding power source and
disconnect input power.
Remove wrapper.
1 Input Capacitor C1
2 Voltmeter
Check input capacitor as shown.
Measure dc voltage across positive
(+) and negative (–) terminals until
voltage drops to near 0 (zero) volts.
1
Proceed with job inside unit.
Reinstall wrapper when finished.
before
Ref. ST-801 603