Miller Electric | 460Volt | Specifications | Miller Electric 460Volt Specifications

TM-2208E
July 2000
Eff. w/Serial Number KG049063
Processes
Multiprocess Welding
Description
Arc Welding Power Source
EX300
(230/460 and 460/575
Volt Models)
CC/CV and CC Models
TABLE OF CONTENTS
WARNING
SECTION 1 – SAFETY PRECAUTIONS FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1. Symbol Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2. Servicing Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3. EMF Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
1
2
SECTION 2 – INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2. Duty Cycle And Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3. Volt-Ampere Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
4
SECTION 3 – INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1. Selecting a Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2. Weld Output Receptacles And Selecting Cable Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3. Remote 14 Receptacle Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4. Optional 115 Volts AC Duplex Receptacle And Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . .
3-5. Electrical Service Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6. Connecting Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
5
6
6
7
7
8
SECTION 4 – OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1. Front Panel Controls For CC/CV Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2. Front Panel Controls For CC Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3. Meter Functions For CC/CV Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4. Mode Switch Settings For CC/CV Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5. Meter Functions For CC Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-6. Mode Switch Settings For CC Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7. Lift-Arc TIG Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
9
10
11
11
12
12
13
SECTION 5 – THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
SECTION 6 – PRE-POWER CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1. Checking Unit Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2. Output Diodes D1, D2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3. Input Rectifier SR1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4. Tank Capacitor C1 and Input Capacitors C3, C4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5. IGBT Modules PM1, PM2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6. Diodes D1, D2, D3, D4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7. Contactors W1, W2 (230/460 V Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
16
16
17
17
18
19
20
SECTION 7 – TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1. Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2. Voltmeter/Ammeter Help Displays Prior to KG177169 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3. Voltmeter/Ammeter Help Displays Effective with KG177169 . . . . . . . . . . . . . . . . . . . . . . . . . .
7-4. Troubleshooting Circuit Diagram for 230/460 Volt Models
Prior To Serial No. KK104771 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-5. Troubleshooting Circuit Diagram for 230/460 Volt Models
Effective With Serial No. KK104771 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-6. Troubleshooting Circuit Diagram for 460/575 Volt Models
Prior To Serial No. KK104771 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-7. Troubleshooting Circuit Diagram for 460/575 Volt Models
Effective With Serial No. KK104771 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-8. Waveforms For Sections 7-4 Thru 7-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-9. Control Board PC1 Testing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-10. Control Board PC1 Test Point Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-11. Display Board PC3 Testing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-12. Display Board PC3 Test Point Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-13. Interconnecting Board PC2 Testing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
21
23
24
32
34
35
36
39
40
42
SECTION 8 – MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1. Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-2. Blowing Out Inside Of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-3. Measuring Input Capacitor Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-4. Checking Bus Voltage Imbalance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
43
43
43
44
45
This product, when used
for welding or cutting,
produces fumes or
gases which contain
chemicals known to the
State of California to
cause birth defects and,
in some cases, cancer.
(California Health &
Safety Code Section
25249.5 et seq.)
26
28
30
SECTION 9 – ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47
SECTION 10 – PARTS LIST FOR KG049063 THRU KK104770 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
87
SECTION 11 – PARTS LIST FOR KK104771 AND FOLLOWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
92
TM-2208
SECTION 1 – SAFETY PRECAUTIONS FOR SERVICING
safety_stm1 4/95
1-1. Symbol Usage
Means Warning! Watch Out! There are possible hazards with this
procedure! The possible hazards are shown in the adjoining symbols.
Y Marks a special safety message.
. Means NOTE; not safety related.
This group of symbols means Warning! Watch Out! possible ELECTRIC SHOCK, MOVING PARTS,
and HOT PARTS hazards. Consult symbols and related instructions below for necessary actions to
avoid the hazards.
1-2. Servicing Hazards
WARNING
The symbols shown below are used throughout this manual to call attention to and identify possible
hazards. When you see the symbol, watch out, and follow the related instructions to avoid the hazard.
Only qualified persons should service, test, maintain, and repair this unit.
During servicing, keep everybody, especially children, away.
ELECTRIC SHOCK can kill.
HOT PARTS can cause severe burns.
1. Do not touch live electrical parts.
2. Stop engine or turn OFF welding power source and
wire feeder, and disconnect and lockout input
power using line disconnect switch, circuit
breakers, or by removing plug from receptacle
before servicing unless the procedure specifically
requires an energized unit.
3. Insulate yourself from ground by standing or
working on dry insulating mats big enough to
prevent contact with the ground.
4. Do not leave live unit unattended.
5. When testing a live unit, use the one-hand method.
Do not put both hands inside unit. Keep one hand
free.
6. Disconnect input power conductors from
deenergized supply line BEFORE moving a
welding power source.
SIGNIFICANT DC VOLTAGE exists after
removal of input power on inverters.
2. Allow cooling period before servicing welding gun
or torch.
EXPLODING PARTS can cause injury.
1. Failed parts can explode or cause other parts to
explode when power is applied to inverters.
2. Always wear a face shield and long sleeves when
servicing inverters.
ELECTRIC SHOCK HAZARD
incorrect use of test equipment.
from
1. Turn Off welding power source and wire feeder or
stop engine before making or changing meter lead
connections.
7. Turn Off inverter, disconnect input power, and
discharge input capacitors according to
instructions in Maintenance Section before
touching any parts.
2. At least one meter lead should be a self-retaining
spring clip such as an alligator clamp.
STATIC ELECTRICITY can
parts on circuit boards.
HIGH-FREQUENCY RADIATION can
interfere with radio navigation, safety
services,
computers,
and
communications equipment.
damage
1. Put on grounded wrist strap BEFORE handling
boards or parts.
2. Use proper static-proof bags to store, move, or ship
PC boards.
FIRE OR EXPLOSION can result from
placing unit on, over, or near
combustible surfaces.
1. Do not place unit on, over, or near combustible
surfaces.
2. Do not service unit near flammables.
XMT 304
1. Do not touch hot parts bare handed.
3. Read instructions for test equipment.
1. Have only qualified persons familiar with electronic
equipment perform this installation.
2. The user is responsible for having a qualified
electrician promptly correct any interference
problem resulting from the installation.
3. If notified by the FCC about interference, stop using
the equipment at once.
FLYING PIECES OF METAL or DIRT can
injure eyes.
4. Have the installation regularly checked and
maintained.
1. Wear safety glasses with side shields or face shield
during servicing.
2. Be careful not to short metal tools, parts, or wires
together during testing and servicing.
5. Keep high-frequency source doors and panels
tightly shut, keep spark gaps at correct setting, and
use grounding and shielding to minimize the
possibility of interference.
TM-2208 Page 1
FALLING EQUIPMENT can cause
serious personal injury and equipment
damage.
MOVING PARTS can cause injury.
1. Use lifting eye to lift unit only, NOT running gear,
gas cylinders, or any other accessories.
OVERUSE can cause OVERHEATED
EQUIPMENT.
2. Use equipment of adequate capacity to lift unit.
MAGNETIC
CURRENTS
operation.
FIELDS FROM HIGH
can affect pacemaker
1. Pacemaker wearers keep away from servicing
areas until consulting your doctor.
MOVING PARTS can cause injury.
1. Keep away from moving parts such as fans.
2. Keep all doors, panels, covers, and guards closed
and securely in place.
1. Keep away from moving parts.
2. Keep away from pinch points such as drive rolls.
1. Allow cooling period.
2. Reduce current or reduce duty cycle before
starting to weld again.
3. Follow rated duty cycle.
READ INSTRUCTIONS.
1. Use MILLER Testing Booklet (Part No. 150 853)
when servicing this unit.
2. Consult the Owner’s Manual for welding safety
precautions.
3. Use only genuine MILLER replacement parts.
1-3. EMF Information
Considerations About Welding And The Effects Of Low Frequency
Electric And Magnetic Fields
The following is a quotation from the General Conclusions Section of
the U.S. Congress, Office of Technology Assessment, Biological
Effects of Power Frequency Electric & Magnetic Fields – Background
Paper, OTA-BP-E-53 (Washington, DC: U.S. Government Printing
Office, May 1989): “. . . there is now a very large volume of scientific
findings based on experiments at the cellular level and from studies
with animals and people which clearly establish that low frequency
magnetic fields can interact with, and produce changes in, biological
systems. While most of this work is of very high quality, the results are
complex. Current scientific understanding does not yet allow us to
interpret the evidence in a single coherent framework. Even more
frustrating, it does not yet allow us to draw definite conclusions about
questions of possible risk or to offer clear science-based advice on
strategies to minimize or avoid potential risks.”
TM-2208 Page 2
To reduce magnetic fields in the workplace, use the following
procedures:
1. Keep cables close together by twisting or taping them.
2. Arrange cables to one side and away from the operator.
3. Do not coil or drape cables around the body.
4. Keep welding power source and cables as far away as
practical.
5. Connect work clamp to workpiece as close to the weld as
possible.
About Pacemakers:
The above procedures are also recommended for pacemaker
wearers. Consult your doctor for complete information.
XMT 304
SECTION 2 – INTRODUCTION
2-1. Specifications
Rated Output at
60% Duty Cycle
Voltage
Range in
CV Mode
Amperage
Range in
CC Mode
Max. OpenCircuit
Voltage
300 A at 32 VDC, 3-Phase
10–35 V
5–400 A
90 VDC
225 A at 29 VDC, 1-Phase
RMS Amps Input at Rated Load
Output, 60 Hz 3-Phase at NEMA Load
Voltages and Class I Rating
230 V
460 V
575 V
KVA
KW
30.5
(0.21*)
18.9
(0.10*)
15.2
(0.08*)
12.2
(0.09*)
11.6
(0.04*)
47.4
(0.34*)
24.5
(0.14*)
––
11.3
(0.09*)
7.6
(0.04*)
*While idling
**See Section 3-5 for additional information.
2-2. Duty Cycle And Overheating
Duty Cycle is percentage of 10 minutes that unit can weld at rated load
without overheating.
If unit overheats, output stops, a
Help message is displayed (see
Section 7-3), and cooling fan runs.
Wait fifteen minutes for unit to cool.
Reduce amperage or voltage, or
duty cycle before welding.
Y Exceeding duty cycle can
damage unit and void
warranty.
60% Duty Cycle
6 Minutes Welding
4 Minutes Resting
Overheating
A or V
0
15
Minutes
OR
Reduce Duty Cycle
sduty1 5/95 / SA-178 651
XMT 304
TM-2208 Page 3
2-3. Volt-Ampere Curves
A. CC Mode
Volt-ampere curves show minimum and maximum voltage and
amperage output capabilities of
unit. Curves of other settings fall between curves shown.
ARC CONTROL
B. CV Mode
va_curve1 4/95 – SA-178 652 / SA-178 653
TM-2208 Page 4
XMT 304
SECTION 3 – INSTALLATION
3-1. Selecting a Location
24 in
(610 mm)
Dimensions And Weight
76 lb (34.6 kg)
17 in
(432 mm)
12-1/2 in
(318 mm)
1
Movement
Lifting Handles
Use handles to lift unit.
2
Y Do not move or operate unit
where it could tip.
1
Hand Cart
Use cart or similar device to move
unit.
3
Rating Label
Use rating label to determine input
power needs.
1
2
4
Line Disconnect Device
Locate unit near correct input
power supply.
Y Special installation may be
required where gasoline or
volatile liquids are present –
see NEC Article 511 or CEC
Section 20.
Location
4
18 in
(460 mm)
3
18 in
(460 mm)
XMT 304
loc_2 3/96 - Ref. ST-151 556 / ST-801 192
TM-2208 Page 5
3-2. Weld Output Receptacles And Selecting Cable Sizes
Total Cable (Copper) Length In Weld Circuit Not Exceeding
100 ft (30 m) Or Less
150 ft
(45 m)
200 ft
(60 m)
250 ft
(70 m)
300 ft
(90 m)
350 ft
(105 m)
400 ft
(120 m)
Welding
Amperes
10 – 60%
Duty
Cycle
60 – 100%
Duty
Cycle
100
4
4
4
3
2
1
1/0
1/0
150
3
3
2
1
1/0
2/0
3/0
3/0
200
3
2
1
1/0
2/0
3/0
4/0
4/0
250
2
1
1/0
2/0
3/0
4/0
2-2/0
2-2/0
300
1
1/0
2/0
3/0
4/0
2-2/0
2-3/0
2-3/0
350
1/0
2/0
3/0
4/0
2-2/0
2-3/0
2-3/0
2-4/0
–
400
1/0
2/0
3/0
4/0
2-2/0
2-3/0
2-4/0
2-4/0
Output Receptacles
500
2/0
3/0
4/0
2-2/0
2-3/0
2-4/0
3-3/0
3-3/0
600
3/0
4/0
2-2/0
2-3/0
2-4/0
3-3/0
3-4/0
3-4/0
Weld Output
Terminals
+
10 – 100% Duty Cycle
Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
S-0007-D
3-3. Remote 14 Receptacle Information
Socket*
A
24 volts ac. Protected by circuit breaker CB2.
B
Contact closure to A completes 24 volts ac
contactor control circuit.
I
115 volts ac. Protected by circuit breaker CB1.
J
Contact closure to I completes 115 volts ac
contactor control circuit.
C
Output to remote control; 0 to +10 volts dc, +10
volts dc in MIG mode.
D
Remote control circuit common.
E
0 to +10 volts dc input command signal from
remote control.
M
CC/CV select (CC/CV models).
A/V
F
Current feedback; +1 volt dc per 100 amperes.
AMPERAGE
VOLTAGE
H
Voltage feedback; +1 volt dc per 10 output receptacle volts.
G
Circuit common for 24 and 115 volts ac circuits.
K
Chassis common.
24 VOLTS AC
A
B
K
J
I
C L N
D M
E
H
Socket Information
115 VOLTS AC
G
F
REMOTE
OUTPUT
CONTROL
GND
*The remaining sockets are not used.
TM-2208 Page 6
XMT 304
3-4. Optional 115 Volts AC Duplex Receptacle And Circuit Breakers
1
115 V 10 A AC Receptacle
Power is shared between duplex
receptacle and Remote 14 receptacle (see Section 3-3).
2
3
1
Circuit Breaker CB1
Circuit Breaker CB2
CB1 protects duplex receptacle
and 115 volts ac portion of Remote
14 receptacle from overload.
CB2 protects 24 volts ac portion of
Remote 14 receptacle from
overload.
Press button to reset breaker.
2
3
ST-801 245-A
3-5. Electrical Service Guide
Y
CAUTION: INCORRECT INPUT POWER can damage this welding power source. This welding pow-
er source requires a CONTINUOUS supply of 60 Hz (+10%) power at +10% of rated input voltage. Do
not use a generator with automatic idle device (that idles engine when no load is sensed) to supply
input power to this welding power source.
NOTE
Actual input voltage should not exceed ± 10% of indicated required input voltage. If
actual input voltage is outside of this range, output may not be available.
Single Phase
Three Phase
Input Voltage
230
460
230
460
Input Amperes At Rated Output
47.4
24.5
33
18.9
70
35
45
20
8
12
10
14
123
(37)
201
(61)
112
(34)
175
(53)
8
12
10
14
Max Recommended Standard Fuse Rating In Amperes 1
Normal Operating 2
Min Input Conductor Size In AWG/Kcmil
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG/Kcmil
Reference: 1999 National Electrical Code (NEC)
1 Consult factory for circuit breaker applications.
2 “Normal Operating” (general purpose – no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” (65 amp and
above).
XMT 304
TM-2208 Page 7
3-6. Connecting Input Power
Check input voltage available at
site.
. The Auto-Link circuitry in this
3
unit automatically links the
power source to the primary
voltage being applied. A
230/460 unit can be connected
to either 230 or 460 VAC input
power. A 460/575 model can be
connected to either 460 or 575
VAC input power.
1
1
2
Input And Grounding
Conductors
Line Disconnect Device
See Section 3-5.
2
For single-phase operation:
2
3
Black And White Input
Conductor
4
Red Input Conductor
L1
5
Insulation Sleeving
L2
L3
6
Electrical Tape
Insulate and isolate red conductor
as shown.
L1
L2
Y Always connect green wire
to supply grounding terminal, never to a line terminal.
Connect black, white, and
red wires (L1, L2, L3) to line
terminals.
Green
Green
1
1
Y Always connect grounding
conductor first.
3
= GND/PE
1
4
Green
1
5
6
Tools Needed:
3/8 in
3/8 in
input_9_99 - Ref. ST-144 221 / Ref. ST-070 399-C / ST-801 192
TM-2208 Page 8
XMT 304
Notes
XMT 304
TM-2208 Page 9
SECTION 4 – OPERATION
4-1. Front Panel Controls For CC/CV Model
1
Power Switch
. The
fan motor is thermostatically
controlled and only runs when cooling is
needed.
2
3
4
5
Voltmeter (see Section 4-2)
Ammeter (see Section 4-2)
V/A (Voltage/Amperage) Adjustment
Control
Mode Switch
The Mode switch setting determines both the
process and output On/Off control (see Section 4-3). Source of control (panel or remote)
for the amount of output is selected on the
V/A Control switch.
For Air Carbon Arc (CAC-A) cutting and
gouging, place switch in Stick position. For
1
best results, place Inductance/Dig control in
the maximum position.
6
For front panel control, place switch in Panel
position and use the V/A Adjust control.
For remote control, make connections to Remote 14 receptacle, and place switch in Remote position. In most modes, remote control is a percent of V/A Adjust control setting
(value selected on V/A Adjust is maximum
available on remote). In the MIG mode, remote control provides full range of unit output
regardless of V/A Adjust control setting
7
Inductance/Dig Control
Control adjusts Dig when Stick or CC mode
is selected on mode switch. When set to-
2
7
V/A (Voltage/Amperage) Control
Switch
3
wards minimum, short-circuit amperage at
low arc voltage is the same as normal welding amperage.
When set towards maximum, short-circuit
amperage is increased at low arc voltage to
assist with arc starts as well as reduce sticking while welding (see volt-ampere curves in
Section 2-3).
Select setting best suited for application.
Control adjusts inductance when MIG or
V-Sense Feeder position is selected on the
mode switch. Inductance determines the
“wetness” of the weld puddle. When set towards maximum, “wetness” (puddle fluidity)
increases.
When Pulsed MIG or one of the TIG modes
is selected, this control is not functional.
4
5
6
Ref. ST-175 086
TM-2208 Page 10
XMT 304
4-2. Meter Functions For CC/CV Model
NOTE
The meters display the actual weld output values for approximately three seconds
after the arc is broken.
Mode
Meter Reading At Idle
V
Scratch
Start TIG
Lift-Arc TIG
Meter Reading While Welding
A
80.0
85
Actual Volts
Actual Amps
V
A
V
A
7.0
85
85
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
Blank
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
24.5
250
Preset Volts
Blank
Actual Volts
Actual Amps
V
A
V
A
10.3
85
PPP
PPP
24.5
250
Pulse Display
Pulse Display
Actual Volts
Actual Amps
V
A
V
A
Blank
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
85
CC
80.0
V-Sense
Feeder
10.3
Actual Volts
24.5
Stick
85
Preset Amps
85
Pulsed
MIG
10.3
A
Actual Volts (OCV)
TIG
MIG
V
85
24.5
24.5
85
85
Actual Volts (OCV)
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
24.5
250
Blank
Actual Volts
Actual Amps
80.0
Flashes OCV And Preset
4-3. Mode Switch Settings For CC/CV Model
NOTE
The Stick and CC modes provide the Adaptive Hot Start feature, which
automatically increases the output amperage at the start of a weld should the start
require it. This eliminates electrode sticking at arc start.
Mode Switch Setting
Process
Output On/Off Control
Scratch Start TIG
GTAW
Electrode Hot
Lift-Arc TIG
GTAW – See Section NO TAG
Electrode Hot
TIG
GTAW With HF Unit, Pulsing Device, Or Remote Control
At Remote 14
MIG
GMAW
At Remote 14
Pulsed MIG
GMAW-P (Requires an external pulsing device.)
At Remote 14
CC
Stick (SMAW) With Remote On/Off
At Remote 14
Stick
SMAW
Electrode Hot
V-Sense Feeder
MIG (GMAW) With Voltage Sensing Wire Feeder
Electrode Hot
XMT 304
TM-2208 Page 11
4-4. Front Panel Controls For CC Model
1
Power Switch
V/A Control switch.
For Air Carbon Arc (CAC-A) cutting and
gouging, place switch in one of the Stick
positions. For best results, place Dig control
in the maximum position.
6 V/A (Voltage/Amperage) Control
Switch
For front panel control, place switch in Panel
position and use the V/A Adjust control.
For remote control, make connections to Remote 14 receptacle, and place switch in Remote position. Remote control is a percent of
V/A Adjust control setting. Value selected on
V/A Adjust is maximum available on remote.
. The
fan motor is thermostatically
controlled and only runs when cooling is
needed.
2 Voltmeter (see Section 4-5)
3 Ammeter (see Section 4-5)
4 V/A (Voltage/Amperage) Adjustment
Control
5 Mode Switch
The Mode switch setting determines both the
process and output On/Off control (see Section 4-6). Source of control (panel or remote)
for the amount of output is selected on the
1
2
7
3
7
Dig Control
When set towards minimum, short-circuit
amperage at low arc voltage is the same as
normal welding amperage.
When set towards maximum, short-circuit
amperage is increased at low arc voltage to
assist with arc starts as well as reduce sticking while welding (see volt-ampere curves in
Section 2-3).
Select setting best suited for application.
When a TIG process is selected on the mode
switch, this control is not functional.
4
5
6
Ref. ST-175 500
TM-2208 Page 12
XMT 304
4-5. Meter Functions For CC Model
NOTE
The meters display the actual weld output values for approximately three seconds
after the arc is broken.
Mode
Meter Reading At Idle
V
Scratch
Start TIG
Lift-Arc TIG
Meter Reading While Welding
A
80.0
V
85
10.3
85
Actual Volts (OCV)
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
7.0
85
10.3
85
Actual Volts
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
85
TIG
Stick
(Stiff Or Soft)
A
10.3
85
Blank
Preset Amps
Actual Volts
Actual Amps
V
A
V
A
80.0
Actual Volts (OCV)
85
24.5
Preset Amps
85
Actual Volts
Actual Amps
4-6. Mode Switch Settings For CC Model
NOTE
The Stick modes provide the Adaptive Hot Start feature, which automatically
increases the output amperage at the start of a weld should the start require it. This
eliminates electrode sticking at arc start.
Mode Switch Setting
Process
Output On/Off Control
Scratch Start TIG
GTAW
Electrode Hot
Lift-Arc TIG
GTAW With Lift-Arc Start – See Section NO TAG
Electrode Hot
TIG
GTAW With HF Unit, Pulsing Device, Or Remote Control
At Remote 14
Stick (Stiff)
SMAW When A Stiff Arc Characteristic Is Desired
Electrode Hot
Stick (Soft)
SMAW When A Soft Arc Characteristic Is Desired
Electrode Hot
4-7. Lift-Arc TIG Procedure
With Process Switch in the Lift-Arc
TIG position, start an arc as follows:
1
“Touch”
1–2
Seconds
2
1
TIG Electrode
2
Workpiece
Touch tungsten electrode to workpiece at weld start point, hold
electrode to workpiece for 1-2
seconds, and slowly lift electrode.
An arc will form when electrode is
lifted.
Normal open-circuit voltage is not
present before tungsten electrode
touches workpiece; only a low
sensing voltage is present between
electrode and workpiece. The
solid-state output contactor does
not energize until after electrode is
touching workpiece. This allows
electrode to touch workpiece without overheating, sticking, or getting
contaminated.
Ref. S-156 279
XMT 304
Do NOT Strike Like A Match!
TM-2208 Page 13
SECTION 5 – THEORY OF OPERATION
. Theory of Operation is shown for
18
the 230/460 volt models. Theory
for other models is similar.
1
Power Switch S1
Provides on/off control of welding
power source.
2
Input Rectifier SR1
1
Changes the ac line input power to
Three-Phase
full-wave rectified dc.
Line Input
3 Control Transformer T2
Power
Supplies power to control board PC1,
interconnecting board PC2, and Remote 14 receptacle RC1.
4
2
220
VAC
Circuit Breaker CB1
22
Auto-Link
Contacts
W2, W2A
115 Volt AC Receptacle
Remote 14 Receptacle RC1
Connects remote amperage
voltage, and contactor controls.
8
or
8
Circuit
Breaker
CB1
9
10
5
Remote 14
Receptacle
RC1
460 V Input
Contactor W1
Circuit
Breaker
CB2
230 V
Auto-Link
Contactor W2
11
Fan Motor
FM
Ribbon
Cable
12
11 Fan Motor FM
Display Board PC3
13
12 Display Board PC3
13 Voltmeter V, Ammeter A
Gating
Signals
Control Board PC1
10 230 V Auto-Link Contactor W2
Consists of voltmeter V, ammeter A,
Inductance/Dig control R44, Voltage/
Amperage Adjustment control R2,
Mode switch S3, and Voltage/Amperage Control switch S2.
Gating
Signals
220
VAC
4
7
Connects the 220 volts ac secondary
voltage from T2 to interconnecting
board PC2 to balance voltage on input capacitors C3 and C4.
Provides cooling of internal components.
IGBT Board
PC5
115 Volts AC
Receptacle
460 V Input Contactor W1
Provides automatic linking for different input voltages. W2 sets power circuit for correct input voltage. W2A
sets T2 primary.
24
VAC
IGBT Power
Module PM2
21
IGBT Board
PC4
18
VAC
CenterTapped
6♦
Control Board PC1
Controls weld output by changing
gate pulses (frequency of pulses) to
IGBT power modules PM1 and PM2
after comparing current or voltage
feedback to reference level set by R2
on PC3.
9
21
Control
Transformer T2
115
VAC
22
IGBT Power
Module PM1
W1
3
Circuit Breaker CB2
Connects auxiliary equipment to
welding power source.
7
Interconnecting
Board PC2
10
Provides overload protection for 24
volts ac portion of Remote 14
receptacle RC1.
6
Inductors
L1, L3, L4
20
SCR/
Integrated
Rectifier SR1
Power
Switch
S1
Provides overload protection for 115
volts ac portion of Remote 14 receptacle RC1 and optional 115 volt ac
receptacle.
5
19
Input
Capacitors
C3, C4
13
Voltmeter
V
14
Inductance/
Dig Control
R44
Ammeter
A
15
Voltage/
Amperage
Control R2
See Sections 4-2 and 4-5.
14 Inductance/Dig Control R44
(CC/CV Models) Or Dig Control
R44 (CC Models)
In CV mode, R44 functions as an inductance control modifying the response of the arc. In CC mode, R44
functions as a dig control.
TM-2208 Page 14
16
Mode Switch
S3
17
Voltage/
Amperage
Control
Switch S2
XMT 304
15 Voltage/Amperage Adjustment
Control R2 (CC/CV Models) Or
Amperage Adjustment Control
R2 (CC Models)
23
Current
Transformer
CT1
24
25
Output
Diodes
D1, D2
Main
Transformer
T1
Selects weld output voltage or amperage level. Setting defines maximum output when remote voltage
and/or amperage control is used,
and Mode switch S3 is in a CC
position.
16 Mode Switch S3
Selects type of weld output, meter
function, and remote contactor or
front panel for welding process.
T1 Primary
Current
Feedback
26
27
Hall
Device
HD1
Stabilizer
Z1
17 Voltage/Amperage Control
Switch S2 (CC/CV Models) Or
Amperage Control Switch S2
(CC Models)
Selects front panel or remote voltage
or amperage control.
18 Input Capacitors C3, C4
Filter the dc output voltage of SR1.
28
28
Negative (–)
Weld Output
Receptacle
19 Inductors L1, L3, L4
Positive (+)
Weld Output
Receptacle
L1 limits peak current in SR1, C3,
and C4. L3 and L4 limit voltage and
current in IGBT’s during turn-on and
turn-off.
20 Interconnecting Board PC2
Work
Electrode
Provides electrical connections for
SR1, T1, C3, C4, L1, L3, L4, and
IGBT’s. Precharge and bleeder
resistors are mounted on PC2.
21 IGBT Boards PC4, PC5
Current Feedback
Provide interconnection of gate
pulses from PC1 to PM1 and PM2.
22 IGBT Power Modules PM1,
PM2
Use very fast on/off switching action
to effectively turn the dc into ac.
23 Current Transformer CT1
Provides current feedback to PC1
from the primary of T1 for control circuit timing and to limit primary current.
24 Main Transformer T1
Energized by on/off switching action
of PM1 and PM2, and supplies power to weld output circuit.
Voltage Feedback
25 Output Diodes D1, D2
Voltage Feedback
Rectify output of T1.
26 Stabilizer Z1
Smooths out welding current.
27 Hall Device HD1
AC Or DC Control Circuits
3φ Power
Provides weld or secondary current
feedback signal to PC1.
28 Positive (+) And Negative (–)
Weld Output Receptacles
Provide weld output and allow
changing of output polarity.
Weld Current Circuit
♦
XMT 304
Optional
TM-2208 Page 15
SECTION 6 – PRE-POWER CHECKLIST
6-1. Checking Unit Before Applying Power
. See Section 7-4 for test points and values and Section
10 for parts location.
Y Discharge input capacitors according to Section 8-3 and be sure voltage is near zero before touching any parts.
Y Before troubleshooting or applying power to unit, complete following checks to avoid causing further damage.
Y Although control board PC1 and hall device HD1 are briefly checked in this procedure, more complete tests may be needed later for
these parts. This check is simply to get a basic okay to power up unit.
NOTE
The pre-power checklist should be followed if any of the following conditions exist:
the unit is completely inoperative;
the symptoms are unknown;
visual damage is found on any of the following components: capacitors C3 and C4,
control board PC1, IGBT power modules PM1 and PM2, interconnecting board
PC2, or input rectifier SR1;
there is no output or limited output.
6-2. Output Diodes D1, D2
Y Read and follow safety
information in Section 6-1
before proceeding.
1
2
First, check resistance across
weld output receptacles
(ohms position). Resistance
should be greater than 100
ohms.
If resistance is less than 100
ohms, isolate diodes D1 and
D2 and retest individually
(diode test).
–
Weld Output
Receptacles
+
Diodes D1, D2
Ref. SD-183 484 / ST-801 705
TM-2208 Page 16
XMT 304
6-3. Input Rectifier SR1
Y Read and follow safety
information in Section 6-1
before proceeding.
. Resistance values are based
on in-circuit measurements.
1
2
3
Power Switch S1
Negative (–)
4
–
AC (L1)
SCR (–)
T
Gate
+
G
AC (L2)
S
Positive (+)
AC (L3)
R2
C. Connect black clip to SCR
(–) terminal.
D. Connect yellow clip to gate
terminal.
R
Input Rectifier SR1
Visually inspect SR1 for
damage.
Check 6 diodes (diode test).
Check from each ac terminal
to the positive (+) terminal and
from each ac terminal to the
negative (–) terminal.
Check precharge SCR (ohms
position). Connect negative
lead to SCR (–) terminal and
positive lead to positive (+)
terminal. Resistance should
be 200 ohms ±10%. If meter
reads infinite resistance (OL),
check resistor R7 on
interconnecting board PC2.
Connect a jumper between
positive (+) and gate
terminals. Resistance should
be approximately 35 ohms.
If results are in doubt, use an
IGBT tester (MILLER Part No.
043 553) to test the SCR
portion of SR1 as follows:
A. Disconnect plug PLG13
from receptacle RC1 on interconnecting board PC2.
B. Connect red clip to positive
(+) terminal.
5
If SR1 is defective, check the
three poles of power switch
S1 (switch off = OL, switch on
= 0 ohms).
ST-801 550 / Ref. SD-183 484
6-4. Tank Capacitor C1 and Input Capacitors C3, C4
Y Read and follow safety
information in Section 6-1
before proceeding.
. This is not a conclusive test.
For best results use a capacitor
tester to check capacitance.
. If either C3 or C4 is shorted, remove interconnecting board
PC2 and check IGBT’s PM1
and PM2.
Input Capacitors C3, C4
1
Check C1, C3, and C4 for a
short (ohms position).
Tank Capacitor C1
ST-801 550
XMT 304
TM-2208 Page 17
6-5. IGBT Modules PM1, PM2
Y Read and follow safety
information in Section 6-1
before proceeding.
. It is not necessary to remove
interconnecting board PC2 to
test the IGBT’s unless input capacitor C3 or C4 is shorted.
1
2
3
4
IGBT Board
PC4 Or PC5
G2 (B2)
5
G1 (B1)
Terminal
C1
6
Terminal
E2
Terminal
C2/E1
Visually inspect PM1 and
PM2 for damage.
Disconnect gate lead plug
PLG5 from receptacle RC5 on
control board PC1.
Check C1 to E1 and C2 to E2
on PM1 and PM2 for
resistance greater than 100
ohms (ohms position). Zero
ohms indicates a short.
Check E1 to PLG5-10 and E2
to PLG5-7 for 100 k ohms
±10% (ohms position) on
PM1. Then check E1 to
PLG5-6 and E2 to PLG5-9 for
100 k ohms ±10% (ohms
position) on PM2.
If results are in doubt, use an
IGBT tester (MILLER Part No.
043 553) as follows:
A. Check two IGBT’s per
module.
B. Connect red clip to C.
C. Connect black clip to E.
D. Connect yellow clip to G
(white leads at plug PLG5).
If IGBT’s are defective, check
D1, D2, D3, and D4 on PC2
(see Section 6-6). Also check
W1 and W2 in 230/460 volt
models (see Section 6-7).
IGBT Module PM1 Or PM2
ST-801 550 / Ref. SD-183 484
TM-2208 Page 18
XMT 304
6-6. Diodes D1, D2, D3, D4
Y Read and follow safety
information in Section 6-1
before proceeding.
1
2
Previous
Location Of
Diode D3
Diode
D1
Check D1 and D2 on PC2 for
2000 ohms ±10% in 230/460
volt models or 400 ohms
±10% in 460/575 volt models
(ohms position).
Prior to Serial No. KK266150,
check D3 and D4 on PC2
(diode test). Effective with
Serial No. KK266150, these
diodes are no longer present.
Previous
Location Of
Diode D4
Diode
D2
Interconnecting Board PC2
ST-801 550 / 195 587
XMT 304
TM-2208 Page 19
6-7. Contactors W1, W2 (230/460 V Models Only)
Y Read and follow safety
information in Section 6-1
before proceeding.
1
Normally-Open
Contacts Of 460 V
Input Contactor W1
Check normally-open
contacts of W1 and W2 to be
sure contacts are not stuck
shut (ohms position).
Normally-Open
Contacts Of 230 V
Auto-Link Contactor W2
Interconnecting Board PC2
ST-801 550 / 195 587
TM-2208 Page 20
XMT 304
SECTION 7 – TROUBLESHOOTING
7-1. Troubleshooting Table
. See Section 7-4 and Section 7-6 for test points and
values and Section 10 for parts location.
. Use MILLER Testing Booklet (Part No. 150 853)
when servicing this unit.
Trouble
No weld output; unit completely
inoperative.
Remedy
Follow pre-power checklist (see Section 6).
Place line disconnect switch in On position (see Section 3-6).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-6).
Check for proper input power connections (see Section 3-6).
Check continuity of Power switch S1, and replace if necessary.
Check control transformer T2 for signs of winding failure. Check continuity across windings, and
check for proper connections. Check secondary voltages. Replace T2 if necessary.
No weld output; meter display On.
Follow pre-power checklist (see Section 6).
If using remote control, be sure Voltage/Amperage Control switch S2 (CC/CV models) or Amperage
Control switch S2 (CC models) is in the Remote 14 position.
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), input voltage outside acceptable range
of variation (see Section 3-5). Effective with Serial No. KG177169 (KG177342 w/auxiliary power), see
Sections 7-2 and 7-3 for Help screens.
Unit overheated and Help 3 or Help 5 screen is displayed. Allow unit to cool with fan On (see Sections 7-2 and 7-3).
Check, repair, or replace remote control.
For 230/460 volt models, check coil voltage and connections of contactors W1 and W2. Check
continuity of coils and condition of contacts. Replace W1 and W2 if necessary.
For 460/575 volt models, check coil voltage and connections of contactor CR1. Check continuity of
coil and condition of contacts. Replace CR1 if necessary.
Check resistance and connections of hall device HD1. Check input and output voltages. Replace
HD1 if necessary.
Check output diodes D1 and D2, and replace if necessary.
Check input integrated rectifier SR1, and replace if necessary.
Check IGBT modules PM1 or PM2, and replace if necessary.
Check control board PC1 and connections, and replace if necessary (see Section 7-9).
Low weld output with no control.
Check position of Voltage/Amperage Control switch S2 (see Section 4-1) or Amperage Control switch
S2 (see Section 4-4).
Check resistance and connections of hall device HD1. Check input and output voltages. Replace
HD1 if necessary.
Check control board PC1 and connections, and replace if necessary (see Section 7-9).
Check display board PC3 and connections, and replace if necessary (see Section 7-11).
Maximum weld output with no control.
Check resistance and connections of hall device HD1. Check input and output voltages. Replace
HD1 if necessary.
Check control board PC1 and connections, and replace if necessary (see Section 7-9).
Check display board PC3 and connections, and replace if necessary (see Section 7-11).
XMT 304
TM-2208 Page 21
Trouble
Limited output and low open-circuit
voltage.
Remedy
Follow pre-power checklist (see Section 6).
Check incoming power for correct voltage (see Section 3-5). Replace line fuse(s), if necessary, or
reset circuit breaker (see Section 3-6).
Check for proper input and output connections.
If using remote amperage/voltage control, check position of Amperage/Voltage control R2.
Check hall device HD1. Disconnect HD1 from circuit; if proper open circuit voltage appears, replace
HD1.
Check control board PC1 and connections, and replace if necessary (see Section 7-9).
Check display board PC3 and connections, and replace if necessary (see Section 7-11).
Erratic or improper weld output.
Use proper size and type of weld cable (see Section 3-2).
Clean and tighten all weld connections.
Check for proper input and output connections.
Replace electrode.
Check resistance and connections of remote amperage control potentiometer, and replace if
necessary.
Check resistance and connections of hall device HD1. Check input and output voltages. Replace
HD1 if necessary.
Check control board PC1 and connections, and replace if necessary (see Section 7-9).
No 24 volts ac output at Remote 14
receptacle RC1.
Reset circuit breaker CB2 if necessary (see Section 3-4).
Check receptacle wiring and connections.
No 115 volts ac output at Remote 14
receptacle RC1 or optional duplex
receptacle.
Reset circuit breaker CB1 if necessary (see Section 3-4).
Fan motor does not run after approximately four minutes of operation at
rated load.
Check and clear blocked fan blade
Check receptacle(s) wiring and connections.
Check thermistors RT1 and RT2 on display board PC3 (see Section 7-11).
Check fan motor FM, and replace if necessary.
Wandering arc; poor control of arc
direction.
Use proper size tungsten.
Use properly prepared tungsten.
Reduce gas flow rate.
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Water in torch. Refer to torch manual.
TM-2208 Page 22
XMT 304
7-2. Voltmeter/Ammeter Help Displays Prior to KG177169*
. *Prior to KG177342 w/Auxiliary Power
V
A
HE.L
P–1
1
V
A
HE.L
P–2
V
A
HE.L
P–3
2
3
XMT 304
1
Help 1 Display
Indicates a malfunction in the primary power circuit. If this display is
shown, check tank capacitor C1
(see Section 6-4) and control board
PC1 (see Section 7-9).
2
Help 2 Display
Indicates a malfunction in the thermal protection circuitry of the unit. If
this display is shown, check thermistors RT1 and RT2 and display
board PC3 (see Section 7-11).
3
Help 3 Display
Indicates the unit has overheated
and has automatically shut down to
allow the fan to cool it (see Section
2-2). Operation will continue when
the unit has cooled down.
TM-2208 Page 23
7-3. Voltmeter/Ammeter Help Displays Effective with KG177169*
. *Effective w/KG177342 w/Auxiliary Power
V
A
1
HE.L
P–0
V
A
2
A
HE.L
P–5
V
A
HE.L
P–6
V
A
HE.L
P–7
V
A
HE.L
P–8
V
A
HE.L
P–9
7
HE.L
P–1
V
A
3
8
HE.L
P–2
V
A
4
9
HE.L
P–3
V
A
5
10
HE.L
P–4
. All directions are in reference to the front
of the unit. All circuitry referred to is located inside the unit.
1 Help 0 Display
Indicates a shorted thermistor RT2 on the left
side of the unit. If this display is shown, check
thermistor RT2.
2 Help 1 Display
Indicates a malfunction in the primary power
circuit. If this display is shown, check tank capacitor C1 (see Section 6-4) and control
board PC1 (see Section 7-9).
3 Help 2 Display
Indicates a malfunction in the thermal protection circuitry located on the left side of the unit.
If this display is shown, check thermistor RT2
and display board PC3 (see Section 7-11).
4 Help 3 Display
Indicates the left side of the unit has overheated. The unit has shut down to allow the
TM-2208 Page 24
V
6
fan to cool it (see Section 2-2). Operation will
continue when the unit has cooled.
5 Help 4 Display
Indicates a malfunction in the thermal protection circuitry located on the right side of the
unit. If this display is shown, check thermistor
RT1 and display board PC3 (see Section
7-11).
6 Help 5 Display
Indicates the right side of the unit has overheated. The unit has shut down to allow the
fan to cool it (see Section 2-2). Operation will
continue when the unit has cooled.
7 Help 6 Display
Indicates that the input voltage is too low and
the unit has automatically shut down. Operation will continue when the voltage is within
the acceptable lower range limit (15% below
the applicable input voltage). If this display is
shown, have an electrician check the input
voltage.
8
Help 7 Display
Indicates that the input voltage is too high and
the unit has automatically shut down. Operation will continue when the voltage is within
the acceptable upper range limit (15% above
the applicable input voltage). If this display is
shown, have an electrician check the input
voltage. Effective with KK104771, Help 7 can
also indicate a bus voltage imbalance.
9
Help 8 Display
Indicates a malfunction in the secondary
power circuit of the unit. If this display is
shown, check control board PC1 (see Section 7-9). When this occurs, have an electrician check the primary and secondary connections.
10 Help 9 Display
Indicates a shorted thermistor RT1 on the
right side of the unit. If this display is shown,
check thermistor RT1.
XMT 304
Notes
XMT 304
TM-2208 Page 25
7-4. Troubleshooting Circuit Diagram For 230/460 Volt Models
Prior To Serial No. KK104771
. No calibration available for voltmeter V or ammeter A.
Y Discharge input capacitors according to Section 8-3, and be
sure voltage is near zero before touching any parts.
Ground Current
Sense Control
Relay CR2
Test Equipment Needed:
R1
V8
Ground Current
Sense Control
Relay CR1
V1
V2
V3
V5 V6
V7
V11
V12
V4
See Section
5-1 for PC4
information
460 V Input
Contactor
W1
R8
R7
230 V
Auto-Link
Contactor W2
Approximately
33 k ohms at
685F (205C)
See Section 3-3
for RC1
information
TM-2208 Page 26
See Section
7-5 for
PC1 data
See Section 7-7
for PC3 data
XMT 304
Resistance Values
a)
b)
Tolerance – ±10% unless specified
Turn Off unit and disconnect input power
before checking resistance
R1 thru R6
Less than 1 ohm
R7, R8
7.5 ohms
Voltage Readings
Tolerance – ±10% unless specified
a)
b)
Reference – single arrow: to circuit
common (lead 42) unless noted;
double arrow: reference to points
indicated
c)
Wiring Diagram – see Section 9
See Section 7-9
for PC2 information
V9
V10
R2
R3
V1, V2
230 volts ac
V3
24 volts ac
V4
115 volts ac
V5, V6
18 volts ac
V7
220 volts ac
V8
325 volts dc with 230 volts ac
input power, 650 volts dc with
460 volts ac input power
R4
See Section
5-1 for PC5
information
V9, V10
325 volts dc
V11*
0 volts dc with 230 volts ac
input power, 3.8 volts dc with
460 volts ac input power
V12*
3.8 volts dc with 230 volts ac
input power, 0 volts dc with
460 volts ac input power
V13
28 volts dc when fan FM is
running
V14
24 volts dc
V15
1.5 volt dc per 100 amperes
of weld output
V16
–15 volts dc
V17
87 volts dc open-circuit
voltage
* Pulsed dc values – measurements will vary.
V13
R6
V17, A, B
R5
See Section 7-4
for waveforms
A, B
V14 V15
V16
SC-181 837-B
XMT 304
TM-2208 Page 27
7-5. Troubleshooting Circuit Diagram For 230/460 Volt Models
With Serial Nos. Following KK104771
Y Discharge input capacitors according to Section 8-3, and be
sure voltage is near zero before touching any parts.
Ground Current
Sense Control
Relay CR2
Test Equipment Needed:
. No calibration available for voltmeter V or ammeter A.
R1
V7
Ground Current
Sense Control
Relay CR1
V1
V3
V2
V5 V6
V10
V11
V4
See Section
5-1 for PC4
information
460 V Input
Contactor
W1
R8
R7
230 V
Auto-Link
Contactor W2
Approximately
33 k ohms at
685F (205C)
See Section 3-3
for RC1
information
TM-2208 Page 28
See Section
7-5 for
PC1 data
See Section 7-7
for PC3 data
XMT 304
Resistance Values
a)
b)
Tolerance – ±10% unless specified
Turn Off unit and disconnect input power
before checking resistance
Voltage Readings
Tolerance – ±10% unless specified
R1 thru R6
Less than 1 ohm
a)
R7, R8
7.5 ohms
b)
Reference – single arrow: to circuit
common (lead 42) unless noted;
double arrow: reference to points
indicated
c)
Wiring Diagram – see Section 9
See Section 7-9
for PC2 information
V8
V9
230 volts ac
V3
24 volts ac
V4
115 volts ac
V5, V6
18 volts ac
V7
325 volts dc with 230 volts ac
input power, 650 volts dc with
460 volts ac input power
R4
R3
R2
V1, V2
V8, V9
325 volts dc
V10*
0 volts dc with 230 volts ac
input power, 3.8 volts dc with
460 volts ac input power
V11*
3.8 volts dc with 230 volts ac
input power, 0 volts dc with
460 volts ac input power
V12
28 volts dc when fan FM is
running
V13
–15 volts dc
V14
1 volt dc per 100 amperes of
weld output
V15
+15 volts dc
V16
87 volts dc open-circuit
voltage
* Pulsed dc values – measurements will vary.
See Section
5-1 for PC5
information
V12
V16, A, B
See Section 7-4
for waveforms
A, B
R6
R5
V14 V13 V15
194 588
XMT 304
TM-2208 Page 29
7-6. Troubleshooting Circuit Diagram for 460/575 Volt Models
Prior To Serial No. KK104771
Y Discharge input capacitors according to Section 8-3, and be sure
voltage is near zero before touching any parts.
. No calibration available for voltmeter V or ammeter A.
V9
R1
Test Equipment Needed:
V1
V2
V12
V3
V4
V5
V6
V7
V8
460 V
Auto-Link
Contactor CR1
Approximately
33 k ohms at
685F (205C)
See Section
3-3 for RC1
information
TM-2208 Page 30
See Section
7-5 for PC1
data
See Section
5-1 for PC4
information
See Section 7-7
for PC3 data
XMT 304
Resistance Values
a)
b)
Tolerance – ±10% unless specified
Turn Off unit and disconnect input power
before checking resistance
R1 thru R6
Voltage Readings
a)
Less than 1 ohm
See Section
7-9 for PC2
information
Reference – to circuit common
(lead 42) unless noted
b)
Reference – single arrow: to circuit
common (lead 42) unless noted;
double arrow: reference to points
indicated
c)
Wiring Diagram – see Section 9
V10
V11
R2
R3
R4
Tolerance – ±10% unless specified
b)
V1
460 volts ac with 460 input
power
V2
575 volts ac with 575 input
power
V3
24 volts ac
V4
115 volt ac
V5, V6
18 volts ac
V7
220 volts ac
V8
275 volts ac
V9
650 volts dc with 460 volts ac
input power, 813 volts dc with
575 volts ac input power
V10, V11
325 volts dc with 460 volts ac
input power, 410 volts dc with
575 volts ac input power
V12*
12.5 volts dc with 460 volts ac
input power, 0 volts dc with
575 volts ac input power
V13
28 volts dc when fan FM is
running
V14
24 volts dc
V15
1.5 volt dc per 100 amperes
of weld output
V16
–15 volts dc
V17
87 volts dc open-circuit
voltage
* Pulsed dc values – measurements will vary.
See Section 5-1
for PC5 information
V13
R6
V17, A, B
R5
See Section 7-4
for waveforms A, B
V14
V15
V16
SC-180 958-C
XMT 304
TM-2208 Page 31
7-7. Troubleshooting Circuit Diagram for 460/575 Volt Models
With Serial Nos. Following KK104771
Y Discharge input capacitors according to Section 8-3, and be sure
voltage is near zero before touching any parts.
. No calibration available for voltmeter V or ammeter A.
V7
R1
Test Equipment Needed:
V2
V1
V10
V3
V5
V6
V4
460 V
Auto-Link
Contactor CR1
Approximately
33 k ohms at
685F (205C)
See Section
3-3 for RC1
information
TM-2208 Page 32
See Section
7-5 for PC1
data
See Section
5-1 for PC4
information
See Section 7-7
for PC3 data
XMT 304
Resistance Values
a)
b)
Tolerance – ±10% unless specified
Turn Off unit and disconnect input power
before checking resistance
R1 thru R6
See Section
7-9 for PC2
information
Less than 1 ohm
Voltage Readings
a)
Reference – single arrow: to circuit
common (lead 42) unless noted;
double arrow: reference to points
indicated
c)
Wiring Diagram – see Section 9
V8
V9
R2
R4
R3
Tolerance – ±10% unless specified
b)
V1
460 volts ac with 460 input
power
V2
575 volts ac with 575 input
power
V3
24 volts ac
V4
115 volt ac
V5, V6
18 volts ac
V7
650 volts dc with 460 volts ac
input power, 813 volts dc with
575 volts ac input power
V8, V9
325 volts dc with 460 volts ac
input power, 410 volts dc with
575 volts ac input power
V10*
12.5 volts dc with 460 volts ac
input power, 0 volts dc with
575 volts ac input power
V11
28 volts dc when fan FM is
running
V12
–15 volts dc
V13
1 volt dc per 100 amperes of
weld output
V14
+15 volts dc
V15
87 volts dc open-circuit
voltage
* Pulsed dc values – measurements will vary.
See Section 5-1
for PC5 information
V11
R6
V15, A, B
R5
See Section 7-4
for waveforms A, B
V13
V12
V14
197 553
XMT 304
TM-2208 Page 33
7-8. Waveforms For Sections 7-4 Thru 7-7
10 µs 20 V
gnd
A. CC Or CV Mode, DC Open-Circuit Voltage
10 µs 20 V
gnd
B. CC Or CV Mode, 25 Volts DC, 200 Amperes
(Resistive Load)
Test Equipment Needed:
TM-2208 Page 34
XMT 304
7-9. Control Board PC1 Testing Information (All Models – Use with Section 7-10)
7
Y Discharge input capacitors
according to Section 8-3,
and be sure voltage is near
zero before touching any
parts.
1
4
6
3
Be sure plugs are secure before
testing. See Section 7-10 for
specific values during testing.
1
2
3
4
5
6
7
8
9
10
Control Board PC1
Receptacle RC1
Receptacle RC2
Receptacle RC3
Receptacle RC4
Receptacle RC5
Receptacle RC6
Receptacle RC7
Receptacle RC8
Receptacle RC9
8
10
5
9
2
. 230/460 Volt Model Shown
Test Equipment Needed:
ST-801 550 / 193 753
XMT 304
TM-2208 Page 35
7-10. Control Board PC1 Test Point Values (All Models)
a) Tolerance – ±10% unless specified
PC1 Voltage Readings
b) Reference – to circuit common
(lead 42) unless noted
Receptacle
Pin
RC1
1
+24 volts dc output
2
Not used
3
+24 volts dc output
4
+1 volt dc output per 10 volts dc of weld output
5
–24 volts dc output
6
+15 volts dc output when HELP 1 screen is displayed, 0 volts dc with normal conditions
7
–24 volts dc output
8
0 to +10 volts dc input from min to max of Inductance/Dig control
9
Circuit common
10
Circuit common
11
–24 volts dc input with fan motor FM off, –10 volts dc with fan motor FM on
12
0 volts dc output during normal operation, +15 volts dc output when HELP 8 screen is displayed
13
Not used
14
+15 volts dc output during normal operation, 0 volts dc output when HELP 6 screen is displayed
15
+15 volts dc input in Stick (SMAW) mode, 0 volts dc input in GMAW mode
16
+15 volts dc output during normal operation, 0 volts dc output when HELP 7 screen is displayed
17
+15 volts dc input with weld output on, 0 volts dc input with weld output off
18
+15 volts dc input in Stick Mode, 0 volts dc input in GMAW mode
19
+1.0 to +3.5 volts dc input, CV preset
20
+1 volt dc output per 100 amperes of weld output
21
+15 volts dc input with Mode switch S3 in CV position, 0 volts dc input with S3 in CC position
22
0 to +10 volts dc input from min to max of Voltage/Amperage Adjustment in MIG and Stick modes,
+13 volts dc in Pulse mode and output Off
23
Not used
24
Not used
1
+1.5 volts dc input per 100 amperes of weld output (Prior to KK104771)
Not used (Effective w/KK104771)
2
18 volts ac input with respect to pin RC2-5 (Prior to KK104771)
Not used (Effective w/KK104771)
3
18 volts ac input with respect to pin RC2-5 (Prior to KK104771)
Not used (Effective w/KK104771)
4
+24 volts dc output (Prior to KK104771)
Not used (Effective w/KK104771)
5
Circuit common (Prior to KK104771)
18 volts ac input with respect to pin RC2-11 (Effective w/KK104771)
6
Circuit common (Prior to KK104771)
18 volts ac input with respect to pin RC2-11 (Effective w/KK104771)
7
+15 volts dc output (Prior to KK104771)
Not used (Effective w/KK104771)
RC2
TM-2208 Page 36
Value
XMT 304
Receptacle
Pin
RC2
8
–15 volts dc output (Prior to KK104771)
Not used (Effective w/KK104771)
9
+1 volts dc input per 100 amperes of weld output (Effective w/KK104771)
10
Circuit common (Effective w/KK104771)
11
Circuit common (Effective w/KK104771)
12
Circuit common (Effective w/KK104771)
13
+15 volts dc output (Effective w/KK104771)
14
–15 volts dc output (Effective w/KK104771)
1
Do not measure – high voltage present
2
Do not measure – high voltage present
3
Do not measure – high voltage present
4
Do not measure – high voltage present
5
Not used
6
Negative (–) of C4 325 volts dc with respect to pin RC3-8 (Effective w/KK104771)
7
Not used
8
Positive (+) of C4 325 volts dc with respect to pin RC3-6 (Effective w/KK104771)
9
Not used
10
Positive (+) of C3 325 volts dc with respect to pin RC3-12 (Effective w/KK104771)
11
Not used
12
Negative (–) of C3 325 volts dc with respect to pin RC3-10 (Effective w/KK104771)
1
In 230/460 volt models: with 230 volts ac input power, +3.8 volts dc with respect to pin 3; with 460
volts ac input power, 0 volts dc with respect to pin 3
In 460/575 volt models: with 460 volts ac input power, +12.5 volts dc with respect to pin 3; with 575
volts ac input power, 0 volts dc with respect to pin 3
2
In 230/460 volt models: with 230 volts ac input power, 0 volts dc with respect to pin 3; with 460 volts
ac input power, +3.8 volts dc with respect to pin 3
Not used in 460/575 volt models
3
In 230/460 volt models: with 230 volts ac input power, +3.8 volts dc with respect to pin 1; with 460
volts ac input power, 0 volts dc with respect to pin 1
In 460/575 volt models: with 460 volts ac input power, +12.5 volts dc with respect to pin 1; with 575
volts ac input power, 0 volts dc with respect to pin 1
4
In 230/460 volt models: with 230 volts ac input power, 0 volts dc with respect to pin 3; with 460 volts
ac input power, +3.8 volts dc with respect to pin 3
Not used in 460/575 volt models
RC3
RC4
RC5
Make no connections – damage to test equipment or components can occur.
RC6
RC7
XMT 304
Value
Do not measure – high voltage present.
1
Reference for pins RC7-4 and RC7-5
2
220 volts ac input with respect to black/white lead of control transformer T2 (Prior to KK104771)
Not used (Effective w/KK104771)
3
220 volts ac input with respect to pin RC7-2 after precharge (Prior to KK104771)
Not used (Effective w/KK104771)
4
0 volts dc during precharge, +0.27 volts dc after precharge with respect to pin RC7-1
5
0 volts dc after precharge, +0.6 volts dc at power-up with respect to pin RC7-1
6
Not used
TM-2208 Page 37
Receptacle
Pin
RC8
1
+28 volts dc output with respect to pin RC8-2 when fan is turned On
2
–28 volts dc output with respect to pin RC8-1 when fan is turned On
1
Negative (–) voltage feedback input with respect to pin RC9-3
2
Not used
3
Positive (+) voltage feedback input with respect to pin RC9-1
RC9
TM-2208 Page 38
Value
XMT 304
7-11. Display Board PC3 Testing Information (All Models – Use with Section 7-12)
Y Discharge input capacitors according to Section 8-3, and be sure voltage is near zero before touching any
parts.
Be sure plugs are secure before testing. See
Section 7-12 for specific values during testing.
1 Display Board PC3
2 Receptacle RC1
3 Receptacle RC2
4
Receptacle RC4
8
Voltage/Amperage Adjustment Control
R2 (CC/CV Model) Or Amperage
Adjustment Control R2 (CC Model)
9
Inductance/Dig Control R44 (CC/CV
Model) Or Dig Control R44 (CC Model)
Connection point for thermistor RT1.
5
Receptacle RC5
Connection point for thermistor RT2.
6
7
Voltmeter V
Ammeter A
10 Mode Switch S3
. No calibration available for voltmeter V
or ammeter A.
11 Voltage/Amperage Control Switch S2
(CC/CV Model) Or Amperage Control
Switch S2 (CC Model)
7
6
2
8
1
9
11
5
10
4
3
. CC/CV Model Shown
Test Equipment Needed:
ST- 801 550 / 190 701
XMT 304
TM-2208 Page 39
7-12. Display Board PC3 Test Point Values (All Models)
PC3 Voltage Readings
a) Tolerance – ±10% unless specified
b) Reference – to circuit common
(lead 42) unless noted
Receptacle
Pin
RC1
1
+24 volts dc input
2
Not used
3
+24 volts dc input
4
+1 volt dc input per 10 volts dc of weld output
5
–24 volts dc input
6
+15 volts dc input when Help 1 screen is displayed, 0 volts dc during normal conditions
7
–24 volts dc input
8
0 to +10 volts dc output from min to max of Inductance/Dig control R44 (CC/CV models) or Dig
control R44 (CC models)
9
Circuit common
10
Circuit common
11
–24 volts dc output with fan motor FM off, –10 volts dc output with fan motor FM on
12
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), circuit common; effective with Serial No.
KG177169 (KG177342 w/auxiliary power), 0 volts dc input during normal operation, +15 volts dc input
when Help 8 screen is displayed
13
+15 volts dc output in Lift Arc mode
14
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), circuit common; effective with Serial No.
KG177169 (KG177342 w/auxiliary power), +15 volts dc input during normal operation, 0 volts dc input
when Help 6 screen is displayed
15
+15 volts dc output with Mode switch S3 in Dig (SMAW) position, 0 volts dc output with S3 in GMAW
or GTAW position
16
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), circuit common; effective with Serial No.
KG177169 (KG177342 w/auxiliary power), +15 volts dc input during normal operation, 0 volts dc input
when Help 7 screen is displayed
17
+15 volts dc output with output on, 0 volts dc output with output off
18
+15 volts dc output with Mode switch S3 in droop (SMAW) position, 0 volts dc output with S3 in remaining positions
19
For CC/CV models only, +1 to +3.5 volts dc output, CV preset
20
+1 volt dc input per 100 amperes of weld output
21
+15 volts dc output with Mode switch S3 in CV position, 0 volts dc output with S3 in CC position (always 0 volts dc for CC models)
22
0 to +10 volts dc output from min to max of Voltage/Amperage Adjustment control R2 (CC/CV
models) or Amperage Adjustment control R2 (CC models)
23
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), negative (–) voltage feedback output
with respect to pin RC1-24; effective with Serial No. KG177169 (KG177342 w/auxiliary power), not
used
24
Prior to Serial No. KG177169 (KG177342 w/auxiliary power), positive (+) voltage feedback output
with respect to pin RC1-23; effective with Serial No. KG177169 (KG177342 w/auxiliary power), not
used
TM-2208 Page 40
Value
XMT 304
Receptacle
Pin
Value
RC2
1
Prior to Serial No. KG177169, voltage feedback input with respect to pin RC2-6, same as positive (+)
weld output receptacle. Effective with Serial No. KG177169, CC/CV select (+10 to +35 volts dc with
remote input indicates CV mode; 0 volts dc input indicates CC mode).
2
Circuit common
3
For CC/CV models, in MIG mode: +10 volts dc output; in other modes: 0 to +10 volts dc output from
min to max of Voltage/Amperage Adjustment control R2. In CC models, 0 to +10 volts dc output from
min to max of Amperage Adjustment control R2.
4
+1 volt dc output per 100 amperes of actual output
5
115 volts ac input for weld output (On/Off)
6
Prior to Serial No. KG177169, voltage feedback input with respect to pin RC2-1, same as negative (–)
weld output receptacle. Effective with Serial No. KG177169, not used.
7
Reference common
8
24 volts ac input, for weld output (On/Off)
9
+1 volt dc output per 10 volts dc of weld output
10
0 to +10 volts dc input command signal from min to max of remote control
RC4
1, 2
RT1 input connection
RC5
1, 2
RT2 input connection
XMT 304
TM-2208 Page 41
7-13. Interconnecting Board PC2 Testing Information (All Models)
Y Discharge input capacitors
according to Section 8-3,
and be sure voltage is near
zero before touching any
parts.
. Be sure to use torque values in-
dicated on PC2 when servicing. Use component-to-heat
sink torque value of 26 in-lb
when servicing SR1 and
IGBT’s PM1 and PM2.
. No test point values provided
for this PC board.
1
2
3
4
Interconnecting Board PC2
Receptacle RC1
Receptacle RC2
Receptacle RC3
1
3
2
4
Test Equipment Needed:
ST-801 550 / 195 587
TM-2208 Page 42
XMT 304
SECTION 8 – MAINTENANCE
8-1. Routine Maintenance
. Maintain more often
Y Disconnect power
before maintaining.
during severe conditions.
3 Months
Repair Or
Replace
Cracked
Cables
Replace
Damaged Or
Unreadable
Labels
Replace Cracked
Torch Body
Repair Or Replace
Cracked Cables
And Cords
Clean
And
Tighten Weld
Connections
6 Months
Blow Out Inside
8-2. Blowing Out Inside Of Unit
Y Do not remove case when
blowing out inside of unit.
To blow out unit, direct airflow
through front and back louvers as
shown.
ST-801 192
XMT 304
TM-2208 Page 43
8-3. Measuring Input Capacitor Voltage
Y Significant DC voltage can
remain on capacitors after
unit is Off. Always check capacitors as shown to be sure
they have discharged before
working on unit.
Turn Off welding power source and
disconnect input power.
Remove case.
1
Input Capacitor C3 Terminals
2
Input Capacitor C4 Terminals
3
Voltmeter
Check input capacitors as shown.
Measure the dc voltage across the
positive (+) and negative (–)
terminals until voltage drops to near
0 (zero) volts.
Proceed with job inside unit.
Reinstall case when finished.
1
3
3
Tools Needed:
2
5/16 in
ST-801 550
TM-2208 Page 44
XMT 304
8-4. Checking Bus Voltage Imbalance
NOTE
Check for a bus voltage imbalance whenever any of the following components are
replaced: capacitors C3 or C4; control board PC1; interconnecting board PC2;
IGBT power modules PM1 or PM2; or input rectifier SR1.
Y This procedure requires an
energized unit. Have only
personnel familiar with and
following standard safety
practices do the job.
Turn off welding power source.
Remove case.
1
4
Input Capacitor C3 Terminals
2
Input Capacitor C4 Terminals
3
Voltmeter
4
Receptacle 3/Plug 12
Measure the dc voltage across the
positive (+) and negative (–) terminals on C3 and C4 as shown in Section 8-3 until voltage drops to near
0 (zero) volts.
Prior to Serial No. KK266150, disconnect plug 12 from receptacle 3.
Connect two voltmeters across capacitors C3 and C4 as shown.
Place Process Selector switch in
Remote TIG position.
Use 460 volt primary input power if
possible. Turn on input power and
monitor the voltage levels across
the capacitor terminals. The bus
voltages should remain equal to
each other 15% (48 vdc maximum difference). If the voltage difference exceeds the 15%, immediately turn off the unit and repeat the entire Pre-Power Checklist. If the voltage remains balanced
for 10 seconds, place the Process
Selector Switch in the SMAW position. If the voltage difference now
exceeds the 15%, Immediately
turn off the unit and repeat the entire
Pre–Power Checklist.
3
3
Turn off unit and wait for voltage to
drop to near 0 (zero) volts according to Section 8-3. Prior to Serial
No. KK266150, reconnect plug 12
to receptacle 3.
Reinstall case.
1
2
Tools Needed:
5/16 in
ST-801 523-A / ST-801 536
XMT 304
TM-2208 Page 45
SECTION 9 – ELECTRICAL DIAGRAMS
. The circuits in this manual can be used for troubleshooting, but there might be minor circuit differences from your machine. Use circuit inside
machine case or contact factory for actual circuit, if needed.
The following is a list of all diagrams for models covered by this manual. To order a copy, proceed as follows:
1
2
3
4
Know unit Model and Serial or Style Number.
Use this list to find diagram number.
Include your FAX number or mailing address with your request.
FAX Technical Publications Department at 920-735-4011 or call 920-735-4356.
Model
XMT 304
(All 230/460 Volt Models)
XMT 304
(All 460/575 Volt Models)
Circuit Board PC1
(All CC, 230/460 Volt Models)
Circuit Board PC1
(All CC/CV, 230/460 Volt Models)
Circuit Board PC1
(All 230/460 Volt Models)
Circuit Board PC1
(All 460/575 Volt Models)
Circuit Board PC2
(All Models)
Circuit Board PC3
(All CC, 230/460 Volt Models)
Circuit Board PC3
(All CC, 460/575 Volt Models)
TM-2208 Page 46
Serial Or Style Number
Circuit Diagram
Wiring Diagram
KG049063 thru KG177168
(thru KG177341 w/aux. power)
175 014-A
178 564♦♦
KG177169 thru KK104770
(eff. w/KG177342 w/aux. power)
181 837-B
183 484-A♦♦
KK104771 thru KK266149
194 588
195 876
KK266150 and following
197 550
195 876
KG145520 thru KK104770
180 958-C
180 959-A♦♦
KK104771 thru KK266149
194 589
195 877
KK266150 and following
197 553
195 876
KG049063 thru KG191114
(thru KG139275 w/aux. power)
173 587♦♦
KG191115 thru KH526180
(eff. w/KG139276 w/aux. power)
181 472♦♦
KG049063 thru KG177168
(thru KG177341 w/aux. power)
173 587♦♦
KG177169 thru KH523148
(eff. w/KG177342 w/aux. power)
181 472♦♦
CC/CV models: KH523149 thru
KK104770
CC models: KH526181 thru
KK104770
185 507-A
KK104771 and following
193 755
KG145520 thru KH499630
181 475♦♦
KH499631 thru KK104770
188 657-A
KK104771 and following
193 761
KG049063 thru KH321500
173 591♦♦
KH321501 thru KJ176290
183 623♦♦
KJ176291 thru KK266149
190 430♦♦
KK266150 and following
195 589
KG049063 thru KG191114
(thru KG139275 w/aux. power)
178 846♦♦
KG191115 thru KH353058
(eff. w/KG139276 w/aux. power)
181 488-A♦♦
KG145520 thru KH353058
181 488-A♦♦
XMT 304
Model
Circuit Board PC3
(All CC Models)
Serial Or Style Number
Circuit Diagram
KH353059 thru KH526179
183 324-A♦♦
KH526180 thru KJ188991
187 103♦♦
KJ188992 and following
190 706
KG049063 thru KG177168
(thru KG177341 w/aux. power)
178 843♦♦
KG177169 thru KH353058
(eff. w/KG177342 w/aux. power)
181 485-A♦♦
Circuit Board PC3
(All CC/CV, 460/575 Volt Models)
KG145520 thru KH353058
181 485-A ♦♦
Circuit Board PC3
(All CC/CV Models)
KH353059 thru KH523188
183 321-A♦♦
KH523189 thru KJ188991
187 100♦♦
KJ188992 and following
190 703
KG049063 thru KH450175
173 599♦♦
KH450176 and following
188 015
Circuit Board PC3
(All CC/CV, 230/460 Volt Models)
Circuit Boards PC4, PC5
(All Models)
Wiring Diagram
♦♦ Not included in this manual
XMT 304
TM-2208 Page 47
. *Thru KG177341 w/auxiliary power
SC-175 014-A
Figure 9-1. Circuit for XMT 304 (230/460 V) Eff. w/KG049063 – KG177168*
TM-2208 Page 48
XMT 304
. *Effective w/KG177342 w/auxiliary power
SC-181 837-B
Figure 9-2. Circuit for XMT 304 (230/460 V) Eff. w/KG177169* Thru KK104770
XMT 304
TM-2208 Page 49
194 588
Figure 9-3. Circuit for XMT 304 (230/460 V) Eff. w/KK104771 Thru KK266149
TM-2208 Page 50
XMT 304
197 550
Figure 9-4. Circuit for XMT 304 (230/460 V) Eff. w/KK266150
XMT 304
TM-2208 Page 51
Notes
TM-2208 Page 52
XMT 304
SC-180 958-C
Figure 9-5. Circuit for XMT 304 (460/575 V) Eff. w/KG145520 Thru KK104770
XMT 304
TM-2208 Page 53
194 589
Figure 9-6. Circuit for XMT 304 (460/575 V) Eff. w/KK104771 Thru KK266149
TM-2208 Page 54
XMT 304
197 553
Figure 9-7. Circuit for XMT 304 (460/575 V) Eff. w/KK266150
XMT 304
TM-2208 Page 55
Figure 9-8. Diagram for XMT 304 (230/460 V) Eff. w/KK104771
TM-2208 Page 56
XMT 304
195 876
XMT 304
TM-2208 Page 57
Figure 9-9. Diagram for XMT 304 (460/575 V) Eff. w/KK104770
TM-2208 Page 58
XMT 304
195 877
XMT 304
TM-2208 Page 59
Figure 9-10. Circuit for PC1 (230/460 V) Eff. w/KH526181 (CC) or KH523149 (CC/CV) Thru KK104770
(Part 1 of 3)
TM-2208 Page 60
XMT 304
185 507-A (1 of 3)
XMT 304
TM-2208 Page 61
Figure 9-11. Circuit for PC1 (230/460 V) Eff. w/KH526181 (CC) or KH523149 (CC/CV) Thru KK104770
(Part 2 of 3)
TM-2208 Page 62
XMT 304
185 507-A (2 of 3)
XMT 304
TM-2208 Page 63
Figure 9-12. Circuit for PC1 (230/460 V) Eff. w/KH526181 (CC) or KH523149 (CC/CV) Thru KK104770
(Part 3 of 3)
TM-2208 Page 64
XMT 304
185 507-A (3 of 3)
XMT 304
TM-2208 Page 65
Figure 9-13. Circuit for PC1 (230/460 V) Eff. w/KK104771 (Part 1 of 3)
TM-2208 Page 66
XMT 304
193 755 (1 of 3)
XMT 304
TM-2208 Page 67
Figure 9-14. Circuit for PC1 (230/460 V) Eff. w/KK104771 (Part 2 of 3)
TM-2208 Page 68
XMT 304
193 755 (2 of 3)
XMT 304
TM-2208 Page 69
Figure 9-15. Circuit for PC1 (230/460 V) Eff. w/KK104771 (Part 3 of 3)
TM-2208 Page 70
XMT 304
193 755 (3 of 3)
XMT 304
TM-2208 Page 71
Figure 9-16. Circuit for PC1 (460/575 V) Eff. w/KH499631 Thru KK104770 (Part 1 of 3)
TM-2208 Page 72
XMT 304
188 657-A (1 of 3)
XMT 304
TM-2208 Page 73
Figure 9-17. Circuit for PC1 (460/575 V) Eff. w/KH499631 Thru KK104770 (Part 2 of 3)
TM-2208 Page 74
XMT 304
188 657-A (2 of 3)
XMT 304
TM-2208 Page 75
Figure 9-18. Circuit for PC1 (460/575 V) Eff. w/KH499631 Thru KK104770 (Part 3 of 3)
TM-2208 Page 76
XMT 304
188 657-A (3 of 3)
XMT 304
TM-2208 Page 77
Figure 9-19. Circuit for PC1 (460/575 V) Eff. w/KK104771 (Part 1 of 3)
TM-2208 Page 78
XMT 304
193 761 (1 of 3)
XMT 304
TM-2208 Page 79
Figure 9-20. Circuit for PC1 (460/575 V) Eff. w/KK104771 (Part 2 of 3)
TM-2208 Page 80
XMT 304
193 761 (2 of 3)
XMT 304
TM-2208 Page 81
Figure 9-21. Circuit for PC1 (460/575 V) Eff. w/KK104771 (Part 3 of 3)
TM-2208 Page 82
XMT 304
193 761 (3 of 3)
XMT 304
TM-2208 Page 83
Figure 9-22. Circuit for PC3 (CC) Eff. w/KJ188992
TM-2208 Page 84
XMT 304
190 706
XMT 304
TM-2208 Page 85
Figure 9-23. Circuit for PC3 (CC/CV) Eff. w/KJ188992
TM-2208 Page 86
XMT 304
190 703
XMT 304
TM-2208 Page 87
195 589
Figure 9-24. Circuit for PC2 Eff. w/KK266150
188 015
Figure 9-25. Circuit for PC4, PC5 Eff. w/KH450176
TM-2208 Page 88
XMT 304
TM-2208E
July 2000
Eff. w/Serial Number KG049063
Processes
Multiprocess Welding
Description
Arc Welding Power Source
R
XMT 304
(230/460 And
460/575 Volt Models)
Eff w/KG049063 Thru KK104770
For OM-2208 (175 493) Revisions * Thru J
Visit our website at
www.MillerWelds.com
39
SECTION 10 – PARTS LIST FOR KG049063 THRU KK104770
. Hardware is common and
10 13
31
52
51
47
53
50
57
56
55
7
23
1
2
64
3
63
4
62
67
61
65
60
66
59
5
58
6
8
9
54
10
11
12
13
15
16
17
18
14
19
49
20
48
21
12
46
45
24
44
43
25
23
22
26
42
41 40
32
27
30
29
33
34
35
28
36
37
38
not available unless listed.
ST-801 428-B
Figure 10-1. Parts Assembly
TM-2208 Page 90
XMT 304
Eff w/KG049063 THRU KK104770
Item
No.
Dia.
Mkgs.
Part
No.
Description
Quantity
Figure 10-1. Parts Assembly
. . . 1 . . . . . . . . . . . . . . +175 148 . . WRAPPER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 178 551 . . INSULATOR, side LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 175 256 . . INSULATOR, side RH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 2 . . . . . . . . . . . . . . . 126 416 . . HANDLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 3 . . . . . . . . . . . . . . . 126 415 . . CLAMP, saddle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 4 . . . . . . . . . . . . . . . 138 442 . . LABEL, caution falling equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 5 . . . . . HD1 . . . . . 156 313 . . TRANSDUCER, current 300A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . PLG9 . . . . 130 204 . . CONNECTOR & PINS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 6 . . . . . . . . . . . . . . . 175 142 . . BUS BAR, lem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 7 . . . . . . . . . . . . . . . 175 139 . . BUS BAR, output rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 8 . . . . . . . . . . . . . . . 181 853 . . INSULATOR, screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 9 . . . . . D1,2 . . . . . 179 630 . . KIT DIODE, ultra fast recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 10 . . . . . . . . . . . . . . . 179 276 . . BUSHING, snap-in nyl 1.000 ID x 1.375mtg hole . . . . . . . . . . . . . . . . . . .
. . . 11 . . . C5,6 R1 . . . 175 194 . . RESISTOR/CAPACITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 12 . . . . RT1,2 . . . . 173 632 . . THERMISTOR, NTC 30K ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 13 . . . . . . . . . . . . . . . 185 835 . . LABEL, warning exploding parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 14 . . . . . . . . . . . . . . +183 551 . . WINDTUNNEL, LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 15 . . . . . . . . . . . . . ♦604 176 . . RECEPTACLE, str dx grd 2P3W 15A 125V . . . . . . . . . . . . . . . . . . . . . . . .
. . . 16 . . . . . . . . . . . . . . . 182 445 . . NUT, 1.000NPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 17 . . . . . CB1 . . . . . 089 807 . . CIRCUIT BREAKER, man reset 1P 2.5A 250VAC . . . . . . . . . . . . . . . . . .
. . . 17 . . . . . CB1 . . . ♦083 432 . . CIRCUIT BREAKER, man reset 1P 10A 250VAC . . . . . . . . . . . . . . . . . .
. . . 18 . . . . . CB2 . . . . . 083 432 . . CIRCUIT BREAKER, man reset 1P 10A 250VAC . . . . . . . . . . . . . . . . . .
. . . 19 . . . . . . . . . . . . . . . 175 147 . . PANEL, rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 20 . . . . . . . . . . . . . . . 186 441 . . BUSHING, strain relief .710-.980 ID x 1.375 . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 186 469 . . CABLE, power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . 184 382 . . . CABLE, pwr 12ft (included w/optional Ground Sensor)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (deleted w/KJ297193) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 21 . . . . . . . . . . . . . . . . . . . . . . . . . . PLATE, ident rear (order by model and serial number) . . . . . . . . . . . . . .
. . . 22 . . . . . . . . . . . . . ♦175 282 . . COVER, receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 23 . . . . . . . . . . . . . . . 175 138 . . BOX, louver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 24 . . . . . . . . . . . . . . . 148 329 . . LABEL, caution incorrect voltage (230/460) . . . . . . . . . . . . . . . . . . . . . . . .
. . . 24 . . . . . . . . . . . . . . . 182 227 . . LABEL, caution incorrect voltage (460/575) . . . . . . . . . . . . . . . . . . . . . . . .
. . . 25 . . . . . . . . . . . . . . . . . . . . . . . . . . BRACKET, mtg contactor/capacitor/PC Board (230/460)
193 285 . . (Prior to KJ297193, capacitor elctlt update kit includes bracket and
capacitors C3, C4 part no. 192 935) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
193 288 . . (Service Bracket) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
192 853 . . (Eff w/KJ297193) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 25 . . . . . . . . . . . . . . . . . . . . . . . . . . BRACKET, mtg contactor/capacitor/PC Board (460/575)
194 448 . . (Prior to KK011325, capacitor elctlt update kit includes bracket and
capacitors C3, C4 part no. 193 738) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
192 853 . . (Eff w/KK011325) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 26 . . . . . PC1 . . . . . . . . . . . . . . . . CIRCUIT CARD, control 230/460 (CC model) . . . . . . . . . . . . . . . . . . . . . .
182 425 . . (Prior to KG191115 std) (Prior to KG139276 w/aux power) . . . . . . . . . . .
188 205 . . (Eff w/KG191115 thru KH523148 std)
(Eff w/KG139276 thru KH523148 w/aux power) . . . . . . . . . . . . . . . . . . . .
185 504 . . (Eff w/KH523149 std and w/aux power) . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 26 . . . . . PC1 . . . . . . . . . . . . . . . . CIRCUIT CARD, control 230/460 (CC/CV model) . . . . . . . . . . . . . . . . . .
182 425 . . (Prior to KG177169 std) (Prior to KG177342 w/aux power) . . . . . . . . . .
188 205 . . (Eff w/ KG177169 thru KH523148 std)
(Eff w/ KG177342 thru KH523148 w/aux power) . . . . . . . . . . . . . . . . . . . .
185 504 . . (Eff w/KH523149 std and w/aux power) . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 26 . . . . . PC1 . . . . . 188 068 . . CIRCUIT CARD, control 460/575 (CC/CV & CC models) . . . . . . . . . . . .
. . . . . . . . . . PLG2 . . . . 115 092 . . CONNECTOR & SOCKETS (RC2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . PLG3,7 . . . 115 093 . . CONNECTOR & SOCKETS (RC3) (RC7) . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . PLG4 . . . . 115 094 . . CONNECTOR & SOCKETS (RC4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . PLG5 . . . . 115 091 . . CONNECTOR & SOCKETS (RC5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 27 . . . . RC10 . . . . 166 679 . . CONNECTOR & SOCKETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 28 . . . . . . . . . . . . . . . 180 520 . . INSULATOR, PC card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 29 . . . . W1,2 . . . . 175 082 . . CONTACTOR, def prp 40A 24VAC coil (230/460 only) . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 173 763 . . STAND-OFF, No. 10-32 x 1.418 (230/460 only) . . . . . . . . . . . . . . . . . . . .
XMT 304
1
1
1
2
2
2
1
1
1
1
1
2
2
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
7
TM-2208 Page 91
Item
No.
Dia.
Mkgs.
Part
No.
Eff w/KG049063 THRU KK104770
Description
Quantity
Figure 10-1. Parts Assembly (Continued)
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
30
30
30
30
30
30
31
32
32
32
32
33
34
35
36
37
37
38
. . . . . . T2 . . . . . . 174 982 . .
. . . . . . T2 . . . . . . 184 151 . .
. . . . . . T2 . . . . ♦174 981 . .
. . . . . . T2 . . . . ♦187 757 . .
. . . . . . T2 . . . . . . 180 963 . .
. . . . . . T2 . . . . ♦180 962 . .
. . . . . . . . . . . . . ♦183 549 . .
. . . . . . . . . . . . . . . 183 550 . .
. . . . . . . . . . . . . . . 185 731 . .
. . . . . . . . . . . . . . . 193 016 . .
. . . . . . . . . . . . . . . 192 855 . .
. . . . . . . . . . . . . . . 153 403 . .
. . . . . . . . . . . . . . . 177 547 . .
. . . . . CT1 . . . . . 175 199 . .
. . . . . . . . . . . . . . . 025 248 . .
. . . . . C1 . . . . . 186 015 . .
. . . . . C1 . . . . . 186 549 . .
. . . . . C3,4 . . . . . . . . . . . . . . . .
193 285 . .
TRANSFORMER, control 230/460 (Prior to KH523149) . . . . . . . . . . . . .
TRANSFORMER, control 230/460 (Eff w/KH523149) . . . . . . . . . . . . . . .
TRANSFORMER, control 230/460 (Prior to KH523149) . . . . . . . . . . . . .
TRANSFORMER, control 230/460 (Eff w/KH523149) . . . . . . . . . . . . . . .
TRANSFORMER, control 460/575 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSFORMER, control 460/575 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BRACKET, mtg aux transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WINDTUNNEL, RH (Prior to KH353059) . . . . . . . . . . . . . . . . . . . . . . . . . .
WINDTUNNEL, RH (Eff w/KH353059 thru KJ272682) . . . . . . . . . . . . . . .
WINDTUNNEL, RH (Eff w/KJ272683 thru KJ297192) . . . . . . . . . . . . . . .
WINDTUNNEL, RH (Eff w/KJ297193) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BUSHING, snap-in nyl .750 ID x 1.000mtg . . . . . . . . . . . . . . . . . . . . . . . .
BUSHING, snap-in nyl 1.125mtg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSFORMER, current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STAND-OFF, insul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAPACITOR, polyp film .34uf 1000VAC (230/460) . . . . . . . . . . . . . . . . . .
CAPACITOR, polyp film .27uf 1000VAC (460/575) . . . . . . . . . . . . . . . . . .
CAPACITOR, elctlt 2700uf 450VDC (230/460)
(Prior to KJ297193, capacitor elctlt update kit includes capacitors
C3, C4 and mounting bracket part no. 193 288) . . . . . . . . . . . . . . . . . . . .
192 935 . . (Eff w/KJ297193) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 38 . . . . . C3,4 . . . . . . . . . . . . . . . . CAPACITOR, elctlt 1800uf 500VDC (460/575)
194 448 . . (Prior to KK011325, capacitor elctlt update kit includes capacitors
C3, C4 and mounting bracket part no. 193 288) . . . . . . . . . . . . . . . . . . . .
193 738 . . (Eff w/KK011325) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 39 . . . . . PC2 . . . . +185 090 . . CIRCUIT CARD, interconnect (230/460)
(when ordering PC2, also order MOV protection board 198 095) . . . . . .
. . . 39 . . . . . PC2 . . . . +185 092 . . CIRCUIT CARD, interconnect (460/575)
(when ordering PC2, also order MOV protection board 198 095) . . . . . .
. . . . . . . . . . PLG12 . . . . 131 054 . . CONNECTOR & SOCKETS (RC12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . PLG13 . . . . 131 204 . . CONNECTOR & SOCKETS (RC13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . PLG14 . . . . 115 094 . . CONNECTOR & SOCKETS (RC14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 126 026 . . LABEL, warning electric shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 40 . . . . . . . . . . . . . . . 175 140 . . BRACKET, DI/DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 41 . . . . . . . . . . . . . . . 175 482 . . COIL, DI/DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 42 . . . . . . . . . . . . . . . 109 056 . . CORE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 43 . . . . . SR1 . . . . . 179 629 . . KIT DIODE, power module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 44 . . . . PM1,2 . . . . 180 110 . . KIT, transistor IGBT module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 45 . . . . . . Z1 . . . . . . 173 570 . . STABILIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 46 . . . . . . L1 . . . . . . 173 563 . . INDUCTOR, input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 47 . . . . . . . . . . . . . . . 173 631 . . HEAT SINK, power module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 48 . . . . . . T1 . . . . . . 173 811 . . TRANSFORMER, HF (230/460) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 48 . . . . . . T1 . . . . . . 180 952 . . TRANSFORMER, HF (460/575) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 49 . . . . . . . . . . . . . . . 175 192 . . HEAT SINK, rect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 50 . . . . . . . . . . . . . . . 175 255 . . INSULATOR, rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 110 386 . . RELAY, 24VAC (460/575 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 51 . . . . . . . . . . . . . . . 173 693 . . FOOT, mtg unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 52 . . . . . . . . . . . . . . . 176 736 . . SCREW, mtg foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 53 . . . . . . . . . . . . . . . 175 132 . . BASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 54 . . . . . PC3 . . . . . . . . . . . . . . . . CIRCUIT CARD, front panel display 230/460 (CC model)
178 845 . . (Prior to KG191115 std) (Prior to KG139276 w/aux power) . . . . . . . . . . .
190 704 . . (Eff w/KG191115 std) (Eff w/KG139276 w/aux power) . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 54 . . . . . PC3 . . . . . . . . . . . . . . . . CIRCUIT CARD, front panel display 230/460 (CC/CV model)
178 842 . . (Prior to KG177169 std) (Prior to KG177342 w/aux power) . . . . . . . . . .
190 700 . . (Eff w/KG177169 std) (Eff w/ KG177342 w/aux power) . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 54 . . . . . PC3 . . . . . 190 704 . . CIRCUIT CARD, front panel display 460/575 (CC model) . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM-2208 Page 92
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XMT 304
Eff w/KG049063 THRU KK104770
Item
No.
Dia.
Mkgs.
Part
No.
Description
Quantity
Figure 10-1. Parts Assembly (Continued)
. . . 54 . . . . . PC3 . . . . . 190 700 . . CIRCUIT CARD, front panel display 460/575 (CC/CV model) . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . PLG11 . . . . 115 091 . . CONNECTOR & SOCKETS (RC2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 55 . . . . . FM . . . . . 175 084 . . MOTOR, fan 24VDC 3000RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 56 . . . . . RC1 . . . . . 175 217 . . RECEPTACLE, w/leads & plug (Prior to KH353059) . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 175 249 . . RING, rtng ext 1.188 shaft grv x .054thk (Prior to KH353059) . . . . . . . . 1
. . . 56 . . . . . RC1 . . . . . 185 730 . . RECEPTACLE, w/leads & plug (Eff w/KH353059) . . . . . . . . . . . . . . . . . . 1
. . . 57 . . . . . . . . . . . . . . . 178 548 . . TERMINAL, connector friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 58 . . . . . C7,8 . . . . . 186 543 . . CAPACITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 59 . . . . . . . . . . . . . . . 175 134 . . PANEL, front (Prior to KH353059) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 59 . . . . . . . . . . . . . . . 185 732 . . PANEL, front (Eff w/KH353059) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 60 . . . . . . . . . . . . . . . 129 525 . . RECEPTACLE, twlk insul fem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 61 . . . . . . . . . . . . . . . . . . . . . . . . . . NAMEPLATE, (order by model and serial number) . . . . . . . . . . . . . . . . . 1
. . . 62 . . . . . . . . . . . . . . . 174 992 . . KNOB, pointer .840 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 63 . . . . . . . . . . . . . . . 175 855 . . DOOR, front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 64 . . . . . . . . . . . . . . . 174 991 . . KNOB, pointer 1.250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 65 . . . . . . . . . . . . . . . 176 226 . . INSULATOR, switch power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 66 . . . . . . S1 . . . . . 128 756 . . SWITCH, tgl 3PST 40A 600VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 67 . . . . . . . . . . . . . . . 134 327 . . LABEL, warning general precautionary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . ♦043 588 . . WELD CURRENT GROUND SENSOR, (consisting of)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (deleted w/KJ297193) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 184 376 . . . . BRACKET, mtg relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . CR1 . . . . . 110 386 . . . . RELAY, encl 24VAC DPDT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . PLG20 . . . . 131 056 . . . . CONNECTOR & SOCKETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . CR2 . . . . . 184 380 . . . . SWITCH, reed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
♦Part of 043 302 115V Aux Power Option (230/460) or 043 303 115V Aux Power Option (460/575).
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
XMT 304
TM-2208 Page 93
Notes
OM-2223 Page 94
TM-2208E
July 2000
Eff. w/Serial Number KG049063
Processes
Multiprocess Welding
Description
Arc Welding Power Source
R
XMT 304
(230/460 And
460/575 Volt Models)
Eff w/KK104771 And Following
For OM-2208 (175 493) Revision K And Following
Visit our website at
www.MillerWelds.com
39
SECTION 11 – PARTS LIST FOR KK104771 AND FOLLOWING
. Hardware is common and
34
35
33
52
51
47
53
50
57
56
55
1
23
2
64
3
63
4
62
67
61
65
60
66
59
5
58
6
8
9
7
54
10
11
12
13
15
16
17
18
14
19
49
20
48
21
12
46
45
24
44
43
25
23
22
26
42
41 40
32
31
30
29
27
10 13
36
37
38
not available unless listed.
ST-801 428-C
Figure 11-1. Parts Assembly
TM-2208 Page 96
XMT 304
Eff w/KK104771 And Following
Item
No.
Dia.
Mkgs.
Part
No.
Description
Quantity
Figure 11-1 . Parts Assembly
. . . 1 . . . . . . . . . . . . . . +175 148 . .
. . . . . . . . . . . . . . . . . . . . . 178 551 . .
. . . . . . . . . . . . . . . . . . . . . 175 256 . .
. . . 2 . . . . . . . . . . . . . . . 126 416 . .
. . . 3 . . . . . . . . . . . . . . . 126 415 . .
. . . 4 . . . . . . . . . . . . . . . 138 442 . .
. . . 5 . . . . . HD1 . . . . . 189 567 . .
. . . . . . . . . . PLG9 . . . . 130 204 . .
. . . 6 . . . . . . . . . . . . . . . 194 546 . .
. . . 7 . . . . . . . . . . . . . . . 175 139 . .
. . . 8 . . . . . . . . . . . . . . . 181 853 . .
. . . 9 . . . . . D1,2 . . . . . 179 630 . .
. . . 10 . . . . . . . . . . . . . . . 179 276 . .
. . . 11 . . . C5,6 R1 . . . 175 194 . .
. . . 12 . . . . RT1,2 . . . . 173 632 . .
. . . 13 . . . . . . . . . . . . . . . 185 835 . .
. . . 14 . . . . . . . . . . . . . . +183 551 . .
. . . 15 . . . . . . . . . . . . . ♦604 176 . .
. . . 16 . . . . . . . . . . . . . . . 182 445 . .
. . . 17 . . . . . CB1 . . . . . 089 807 . .
. . . 17 . . . . . CB1 . . . ♦083 432 . .
. . . 18 . . . . . CB2 . . . . . 083 432 . .
. . . 19 . . . . . . . . . . . . . . . 175 147 . .
. . . 20 . . . . . . . . . . . . . . . 186 441 . .
. . . . . . . . . . . . . . . . . . . . . 186 469 . .
. . . 21 . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 22 . . . . . . . . . . . . . ♦175 282 . .
. . . 23 . . . . . . . . . . . . . . . 175 138 . .
. . . 24 . . . . . . . . . . . . . . . 148 329 . .
. . . 24 . . . . . . . . . . . . . . . 182 227 . .
. . . 25 . . . . . . . . . . . . . . . 192 853 . .
. . . 26 . . . . . PC1 . . . . . 193 752 . .
. . . 26 . . . . . PC1 . . . . . 193 759 . .
. . . . . . . . . . PLG2 . . . . 131 056 . .
. . . . . . . . . . PLG3 . . . . 130 203 . .
. . . . . . . . . . PLG4 . . . . 115 094 . .
. . . . . . . . . . PLG5 . . . . 115 091 . .
. . . . . . . . . . PLG7 . . . . 115 093 . .
. . . 27 . . . . RC10 . . . . 166 679 . .
. . . 28 . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 29 . . . . W1,2 . . . . 175 082 . .
. . . . . . . . . . . . . . . . . . . . . 173 763 . .
. . . 30 . . . . . . T2 . . . . . . 184 151 . .
. . . 30 . . . . . . T2 . . . . ♦193 774 . .
. . . 30 . . . . . . T2 . . . . . . 180 963 . .
. . . 30 . . . . . . T2 . . . . ♦180 962 . .
. . . 31 . . . . . . . . . . . . . ♦183 549 . .
. . . 32 . . . . . . . . . . . . . . . 192 855 . .
. . . 33 . . . . . . . . . . . . . . . 153 403 . .
. . . 34 . . . . . . . . . . . . . . . 177 547 . .
. . . 35 . . . . . CT1 . . . . . 175 199 . .
. . . 36 . . . . . . . . . . . . . . . 025 248 . .
. . . 37 . . . . . C1 . . . . . 186 015 . .
. . . 37 . . . . . C1 . . . . . 186 549 . .
. . . 38 . . . . . C3,4 . . . . . 192 935 . .
. . . 38 . . . . . C3,4 . . . . . 193 738 . .
XMT 304
WRAPPER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSULATOR, side LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSULATOR, side RH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HANDLE (Eff w/KK266150, includes saddle clamp) . . . . . . . . . . . . . . . . . 2
CLAMP, saddle (deleted w/KK266150) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LABEL, caution falling equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TRANSDUCER, current 300A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & PINS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BUS BAR, lem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BUS BAR, output rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSULATOR, screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
KIT DIODE, ultra fast recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
BUSHING, snap-in nyl 1.000 ID x 1.375mtg hole . . . . . . . . . . . . . . . . . . . 2
RESISTOR/CAPACITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
THERMISTOR, NTC 30K ohm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LABEL, warning exploding parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
WINDTUNNEL, LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RECEPTACLE, str dx grd 2P3W 15A 125V . . . . . . . . . . . . . . . . . . . . . . . . 1
NUT, 1.000NPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CIRCUIT BREAKER, man reset 1P 2.5A 250VAC . . . . . . . . . . . . . . . . . . 1
CIRCUIT BREAKER, man reset 1P 10A 250VAC . . . . . . . . . . . . . . . . . . 1
CIRCUIT BREAKER, man reset 1P 10A 250VAC . . . . . . . . . . . . . . . . . . 1
PANEL, rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BUSHING, strain relief .710-.980 ID x 1.375 . . . . . . . . . . . . . . . . . . . . . . . 1
CABLE, power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PLATE, ident rear (order by model and serial number) . . . . . . . . . . . . . . 1
COVER, receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BOX, louver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LABEL, caution incorrect voltage (230/460) . . . . . . . . . . . . . . . . . . . . . . . . 1
LABEL, caution incorrect voltage (460/575) . . . . . . . . . . . . . . . . . . . . . . . . 1
BRACKET, mtg contactor/capacitor/PC Board . . . . . . . . . . . . . . . . . . . . . 1
CIRCUIT CARD, control (230/460) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CIRCUIT CARD, control (460/575) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS (RC2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS (RC3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS (RC4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS (RC5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS (RC7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONNECTOR & SOCKETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTACTOR, def prp 40A 24VAC coil (230/460 only) . . . . . . . . . . . . . . 1
STAND-OFF, No. 10-32 x 1.418 (230/460 only) . . . . . . . . . . . . . . . . . . . . 7
TRANSFORMER, control (230/460) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TRANSFORMER, control (230/460) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TRANSFORMER, control (460/575) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TRANSFORMER, control (460/575) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BRACKET, mtg aux transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
WINDTUNNEL, RH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BUSHING, snap-in nyl .750 ID x 1.000mtg . . . . . . . . . . . . . . . . . . . . . . . . 2
BUSHING, snap-in nyl 1.125mtg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TRANSFORMER, current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
STAND-OFF, insul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CAPACITOR, polyp film .34uf 1000VAC (230/460) . . . . . . . . . . . . . . . . . . 1
CAPACITOR, polyp film .27uf 1000VAC (460/575) . . . . . . . . . . . . . . . . . . 1
CAPACITOR, elctlt 2700uf 450VDC (230/460) . . . . . . . . . . . . . . . . . . . . . 2
CAPACITOR, elctlt 1800uf 500VDV (460/575) . . . . . . . . . . . . . . . . . . . . . 2
TM-2208 Page 97
Item
No.
Dia.
Mkgs.
Part
No.
Eff w/KK104771 And Following
Description
Quantity
Figure 11-1. Parts Assembly (Continued)
. . . 39 . . . . . PC2 . . . . . . . . . . . . . . . . CIRCUIT CARD, interconnect (230/460)
+185 090 . . (Prior to KK266150; also order MOV protection board 198 095) . . . . . . 1
+197 585 . . (Eff w/KK266150) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 39 . . . . . PC2 . . . . . . . . . . . . . . . . CIRCUIT CARD, interconnect (460/575)
+185 092 . . (Prior to KK266150; also order MOV protection board 198 095) . . . . . . 1
+197 586 . . (Eff w/KK266150) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . PLG12 . . . . 131 054 . . CONNECTOR & SOCKETS (RC12) (deleted eff w/KK266150) . . . . . . . 1
. . . . . . . . . . PLG13 . . . . 131 204 . . CONNECTOR & SOCKETS (RC13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . PLG14 . . . . 115 094 . . CONNECTOR & SOCKETS (RC14) (Prior to KK266150) . . . . . . . . . . . . 1
. . . . . . . . PLG14,21 . . 115 093 . . CONNECTOR & SOCKETS (RC14,21) (Eff w/KK266150) . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . 126 026 . . LABEL, warning electric shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 40 . . . . . . . . . . . . . . . 175 140 . . BRACKET, DI/DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 41 . . . . . . . . . . . . . . . 175 482 . . COIL, DI/DT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 42 . . . . . . . . . . . . . . . 109 056 . . CORE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 43 . . . . . SR1 . . . . . 179 629 . . KIT DIODE, power module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 44 . . . . PM1,2 . . . . 180 110 . . KIT, transistor IGBT module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 45 . . . . . . Z1 . . . . . . 173 570 . . STABILIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 46 . . . . . . L1 . . . . . . 173 563 . . INDUCTOR, input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 47 . . . . . . . . . . . . . . . 173 631 . . HEAT SINK, power module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 48 . . . . . . T1 . . . . . . 173 811 . . TRANSFORMER, HF (230/460) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 48 . . . . . . T1 . . . . . . 180 952 . . TRANSFORMER, HF (460/575) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 49 . . . . . . . . . . . . . . . 175 192 . . HEAT SINK, rect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 50 . . . . . . . . . . . . . . . 175 255 . . INSULATOR, rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 110 386 . . RELAY, 24VAC (460/575 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 51 . . . . . . . . . . . . . . . 173 693 . . FOOT, mtg unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
. . . 52 . . . . . . . . . . . . . . . 176 736 . . SCREW, mtg foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
. . . 53 . . . . . . . . . . . . . . . 175 132 . . BASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 54 . . . . . PC3 . . . . . 190 704 . . CIRCUIT CARD, front panel display (CC model) . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 54 . . . . . PC3 . . . . . 190 700 . . CIRCUIT CARD, front panel display (CC/CV model) . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . 190 380 . . . . ASSY, socket/7 segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . PLG11 . . . . 115 091 . . CONNECTOR & SOCKETS (RC2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 55 . . . . . FM . . . . . 175 084 . . MOTOR, fan 24VDC 3000RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 56 . . . . . RC1 . . . . . 185 730 . . RECEPTACLE, w/leads & plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 57 . . . . . . . . . . . . . . . 178 548 . . TERMINAL, connector friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 58 . . . . . C7,8 . . . . . 186 543 . . CAPACITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 59 . . . . . . . . . . . . . . . 185 732 . . PANEL, front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 60 . . . . . . . . . . . . . . . 129 525 . . RECEPTACLE, twlk insul fem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 61 . . . . . . . . . . . . . . . . . . . . . . . . . . NAMEPLATE, (order by model and serial number) . . . . . . . . . . . . . . . . . 1
. . . 62 . . . . . . . . . . . . . . . 174 992 . . KNOB, pointer .840 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 63 . . . . . . . . . . . . . . . 175 855 . . DOOR, front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 64 . . . . . . . . . . . . . . . 174 991 . . KNOB, pointer 1.250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . 65 . . . . . . . . . . . . . . . 176 226 . . INSULATOR, switch power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 66 . . . . . . S1 . . . . . 128 756 . . SWITCH, tgl 3PST 40A 600VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . 67 . . . . . . . . . . . . . . . 134 327 . . LABEL, warning general precautionary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
♦Part of 043 302 115V Aux Power Option (230/460) or 043 303 115V Aux Power Option (460/575).
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
TM-2208 Page 98
XMT 304
Eff w/KK104771 And Following
Notes
XMT 304
TM-2208 Page 99
Notes
TM-2208 Page 100
Eff w/KK104771 And Following
XMT 304
Call
1-800-4-AMILLER
for your local
Miller distributor.
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
International Headquarters–USA
Phone: 920-735-4505
USA & Canada FAX: 920-735-4134
International FAX: 920-735-4125
European Headquarters –
United Kingdom
Phone: 44 (0) 1204-593493
FAX: 44 (0) 1204-598066
PRINTED IN USA
 1998 Miller Electric Mfg. Co.
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