ARCMASTER® 185 AC/DC 200 AC/DC Service Manual

ARCMASTER® 185 AC/DC 200 AC/DC Service Manual
185 AC/DC
200 AC/DC
ARCMASTER
®
INVERTER ARC WELDERS
Art # A-07227
Service Manual
Revision No: AF
Issue Date: May 22, 2006
Manual No.: 0-4884B
Operating Features:
GTAW
SMAW
50Hz
60
INVERTER
CC
AC
DC
!
WARNINGS
Read and understand this entire Manual and your employer’s safety practices before installing,
operating, or servicing the equipment.
While the information contained in this Manual represents the Manufacturer's best judgement,
the Manufacturer assumes no liability for its use.
Service Manual Number 0-4884B for:
ArcMaster 185 AC/DC Inverter Arc Welder
ArcMaster 200 AC/DC Inverter Arc Welder
Part Number 10-3073
Part Number 10-3083
Published by:
Thermadyne Industries Inc.
82 Benning Street
West Lebanon, New Hampshire, USA 03784
(603) 298-5711
www.thermalarc.com
Copyright 2006, 2007, 2008 by
Thermadyne Industries Inc.
All rights reserved.
Reproduction of this work, in whole or in part, without written permission of the publisher
is prohibited.
The publisher does not assume and hereby disclaims any liability to any party for any
loss or damage caused by any error or omission in this Manual, whether such error
results from negligence, accident, or any other cause.
Publication Date:
Revision AF Date:
May 22, 2006
January 28, 2008
Record the following information for Warranty purposes:
Where Purchased:
___________________________________
Purchase Date:
___________________________________
Equipment Serial #:
___________________________________
i
TABLE OF CONTENTS
SECTION 1:
SAFETY INSTRUCTIONS AND WARNINGS ....................................................... 1-1
1.01
1.02
1.03
1.04
1.05
Arc Welding Hazards ...................................................................................... 1-1
Principal Safety Standards ............................................................................. 1-4
Precautions de Securite en Soudage à l’Arc ................................................... 1-5
Dangers Relatifs au Soudage à l’Arc ............................................................... 1-5
Principales Normes de Securite ..................................................................... 1-8
SECTION 2:
INTRODUCTION ...................................................................................... 2-1
2.01 How To Use This Manual ................................................................................ 2-1
2.02 Equipment Identification................................................................................. 2-1
2.04 Symbol Chart ................................................................................................. 2-2
2.05 Description ..................................................................................................... 2-3
2.06 Functional Block Diagrams ............................................................................. 2-4
2.07 Transporting Methods .................................................................................... 2-5
SECTION 3:
INSTALLATION ....................................................................................... 3-1
3.01
3.02
3.03
3.04
3.05
3.06
3.07
3.08
3.09
4.01
Environment ................................................................................................... 3-1
Location ........................................................................................................ 3-1
Electrical Input Connections ........................................................................... 3-1
Electrical Input Requirement .......................................................................... 3-1
Input Power .................................................................................................... 3-3
High Frequency Introduction .......................................................................... 3-3
High Frequency Interference .......................................................................... 3-4
Duty Cycle ...................................................................................................... 3-4
Specifications ................................................................................................. 3-5
ArcMaster 185/200 ACDC Controls ................................................................ 4-1
SECTION 4:
OPERATOR CONTROLS ............................................................................. 4-1
4.02
4.03
4.04
4.05
Weld Process Selection .................................................................................. 4-2
Weld Parameter Descriptions for ARC MASTER 185/200 ACDC .................... 4-3
Weld Parameters for ARC MASTER 185/200 ACDC ....................................... 4-5
Power Source Features................................................................................... 4-6
SECTION 5:
SET-UP FOR SMAW (STICK) AND GTAW (TIG) .................................................. 5-1
SECTION 6:
SEQUENCE OF OPERATION ........................................................................ 6-1
6.01
6.02
6.03
6.04
6.05
Stick Welding ................................................................................................. 6-1
AC or DC HF TIG Welding ............................................................................... 6-1
Slope Mode Sequence .................................................................................... 6-2
Slope Mode with Repeat Sequence ................................................................ 6-2
Pulse Controls ................................................................................................ 6-2
TABLETABLE
OF CONTENTS
OF CONTENTS
(continued)
SECTION 7:
ROUTINE MAINTENANCE ........................................................................... 7-1
SECTION 8:
BASIC TROUBLESHOOTING ........................................................................ 8-1
8.01 General Troubleshooting ................................................................................ 8-1
8.02 Common Welding Operation Faults ................................................................ 8-1
8.03 TIG Welding Problems ................................................................................... 8-2
8.04 Stick Welding Problems ................................................................................. 8-4
8.05 Power Source Problems ................................................................................. 8-6
8.06 Error Codes .................................................................................................... 8-7
SECTION 9:
VOLTAGE REDUCTION DEVICE (VRD) ............................................................ 9-1
9.01 VRD Specification: .......................................................................................... 9-1
9.02 VRD Maintenance ........................................................................................... 9-1
9.03 Switching VRD On/Off .................................................................................... 9-2
SECTION 10:
ADVANCED TROUBLESHOOTING ................................................................. 10-1
10.01 System-Level Fault Isolation ....................................................................... 10-1
10.02 Opening the Enclosure ................................................................................ 10-2
10.03 Verification and Remedy to the Indicated Error Codes ............................... 10-4
10.04 Verification and Remedy to Failures without Indication Codes ................... 10-8
10.05 Fault Isolation Tests .................................................................................. 10-11
10.06 Verification of the Power Input Circuitry ................................................... 10-12
10.07 Verification of Power Supply Voltage ........................................................ 10-13
SECTION 11:
REPAIR PROCEDURES ............................................................................. 11-1
11.01 Maintenance List ........................................................................................ 11-1
11.02 Service Tools .............................................................................................. 11-5
11.02.1 Tools and parts ........................................................................................ 11-5
11.02.2 Notes of disassembly and assembly ........................................................ 11-5
11.03 Replacement Procedure ............................................................................. 11-6
11.03.1 PCB1 (WK-5477) ..................................................................................... 11-6
11.03.2 PCB2 (WK-5596) 185ACDC only ............................................................. 11-7
11.03.3 PCB2 (WK-5482) 200ACDC only ............................................................. 11-8
11.03.4 PCB3 (WK-5548), PCB5 (WK-5551) ...................................................... 11-10
11.03.5 PCB4 (WK-4819) ................................................................................... 11-11
11.03.6 PCB6 (WK-5549) ................................................................................... 11-12
11.03.7 PCB7 (WK-5550) ................................................................................... 11-12
11.03.8 PCB8 (WK-5479) (IGBT (Q1~Q6) .......................................................... 11-13
11.03.9 PCB9 (WK-5479) (IGBT (Q7~Q12) ........................................................ 11-13
11.03.10 PCB10 (WK-5527) ............................................................................... 11-14
11.03.11 PCB11 (WK-5528) ............................................................................... 11-15
11.03.12 PCB12 (WK-5615), Transformer (T1), Current Trans (CT2) ................ 11-16
11.03.13 PCB13 (WK-5569) ............................................................................... 11-19
11.03.14 PCB16 (WK-5499) ............................................................................... 11-20
11.03.15 PCB14 (WK-5570) ............................................................................... 11-20
11.03.16 PCB17 (WK-4917 ................................................................................ 11-21
11.03.17 Discharge Resistor (R3) ...................................................................... 11-22
11.03.18 Current Limiting Resistor (R4, R5) ...................................................... 11-24
11.03.19 Resistor on High Frequency Unit (R6) ................................................. 11-24
11.03.20 Coupling Coil (CC1) ............................................................................. 11-25
11.03.21 Reactor (FCH1) .................................................................................... 11-26
11.03.22 Primary Thermistor (TH1) ................................................................... 11-27
11.03.23 Secondary Thermistor (TH2) ............................................................... 11-27
11.03.24 Cooling Fan (FAN1) .............................................................................. 11-28
11.03.25 Solenoid Valve (SOL1). ........................................................................ 11-29
11.03.26 Main ON/OFF Switch (S1) ................................................................... 11-29
11.03.27 Input Voltage Switch (S2). ................................................................... 11-30
11.03.28 Remote Connector (CON1) .................................................................. 11-31
11.03.29 High Freguency Unit (HF.UNIT1) .......................................................... 11-32
11.03.30 Hall C.T. (HCT1). .................................................................................. 11-33
11.03.31 Primary Diode (D1) ............................................................................. 11-34
11.03.32 Secondary Diode (D2, D4, D5). ........................................................... 11-34
11.03.33 Secondary IGBT (Q13) (PCB15 (WK-3367) ......................................... 11-35
APPENDIX 1: PARTS LIST ................................................................................. A1
1 Equipment Identification ....................................................................................... A1
2 How To Use This Parts List ................................................................................... A1
185/200 ACDC Parts Lists .................................................................................... A1-3
APPENDIX 2: CONNECTION WIRING GUIDE ............................................................ A5
APPENDIX 3: 185 ACDC INTERCONNECT DIAGRAM ................................................... A7
APPENDIX 3: 200 ACDC INTERCONNECT DIAGRAM ................................................... A9
APPENDIX 4: DIODE TESTING BASICS................................................................... A11
LIMITED WARRANTY
WARRANTY SCHEDULE
GLOBAL CUSTOMER SERVICE CONTACT INFORMATION .......................... Inside Rear Cover
ARCMASTER 185 ACDC 200 ACDC
SECTION 1:
SAFETY INSTRUCTIONS AND WARNINGS
!
WARNING
PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP
AWAY UNTIL CONSULTING YOUR DOCTOR. DO NOT LOSE THESE INSTRUCTIONS. READ OPERATING/INSTRUCTION MANUAL BEFORE
INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.
Welding products and welding processes can cause serious injury or death, or damage to other equipment or property, if the operator does not
strictly observe all safety rules and take precautionary actions.
Safe practices have developed from past experience in the use of welding and cutting. These practices must be learned through study and
training before using this equipment. Some of these practices apply to equipment connected to power lines; other practices apply to engine
driven equipment. Anyone not having extensive training in welding and cutting practices should not attempt to weld.
Safe practices are outlined in the American National Standard Z49.1 entitled: SAFETY IN WELDING AND CUTTING. This publication and other
guides to what you should learn before operating this equipment are listed at the end of these safety precautions. HAVE ALL INSTALLATION,
OPERATION, MAINTENANCE, AND REPAIR WORK PERFORMED ONLY BY QUALIFIED PEOPLE.
1.01
Arc Welding Hazards
7. Use fully insulated electrode holders. Never dip holder in water to
cool it or lay it down on the ground or the work surface. Do not
touch holders connected to two welding machines at the same
time or touch other people with the holder or electrode.
8. Do not use worn, damaged, undersized, or poorly spliced cables.
WARNING
9. Do not wrap cables around your body.
10. Ground the workpiece to a good electrical (earth) ground.
ELECTRIC SHOCK can kill.
11. Do not touch electrode while in contact with the work (ground)
circuit.
Touching live electrical parts can cause fatal shocks or
severe burns. The electrode and work circuit is electrically
live whenever the output is on. The input power circuit
and machine internal circuits are also live when power
is on. In semiautomatic or automatic wire welding, the
wire, wire reel, drive roll housing, and all metal parts
touching the welding wire are electrically live. Incorrectly
installed or improperly grounded equipment is a hazard.
12. Use only well-maintained equipment. Repair or replace damaged
parts at once.
1. Do not touch live electrical parts.
13. In confined spaces or damp locations, do not use a welder with
AC output unless it is equipped with a voltage reducer. Use
equipment with DC output.
14. Wear a safety harness to prevent falling if working above floor
level.
15. Keep all panels and covers securely in place.
2. Wear dry, hole-free insulating gloves and body protection.
3. Insulate yourself from work and ground using dry insulating mats
or covers.
4. Disconnect input power or stop engine before installing or
servicing this equipment. Lock input power disconnect switch
open, or remove line fuses so power cannot be turned on
accidentally.
5. Properly install and ground this equipment according to its Owner’s
Manual and national, state, and local codes.
6. Turn off all equipment when not in use. Disconnect power to
equipment if it will be left unattended or out of service.
WARNING
ARC RAYS can burn eyes and skin; NOISE can damage
hearing. Arc rays from the welding process produce
intense heat and strong ultraviolet rays that can burn
eyes and skin. Noise from some processes can damage
hearing.
1. Wear a welding helmet fitted with a proper shade of filter (see
ANSI Z49.1 listed in Safety Standards) to protect your face and
eyes when welding or watching.
2. Wear approved safety glasses. Side shields recommended.
May 22, 2006
1-1
ARCMASTER 185 ACDC 200 ACDC
3. Use protective screens or barriers to protect others from flash
and glare; warn others not to watch the arc.
WARNING
4. Wear protective clothing made from durable, flame-resistant
material (wool and leather) and foot protection.
WELDING can cause fire or explosion.
5. Use approved ear plugs or ear muffs if noise level is high.
Sparks and spatter fly off from the welding arc. The flying
sparks and hot metal, weld spatter, hot workpiece, and
hot equipment can cause fires and burns. Accidental
contact of electrode or welding wire to metal objects
can cause sparks, overheating, or fire.
WARNING
FUMES AND GASES can be hazardous to your health.
1. Protect yourself and others from flying sparks and hot metal.
Welding produces fumes and gases. Breathing these
fumes and gases can be hazardous to your health.
2. Do not weld where flying sparks can strike flammable material.
1. Keep your head out of the fumes. Do not breath the fumes.
3. Remove all flammables within 35 ft (10.7 m) of the welding arc.
If this is not possible, tightly cover them with approved covers.
2. If inside, ventilate the area and/or use exhaust at the arc to remove
welding fumes and gases.
4. Be alert that welding sparks and hot materials from welding can
easily go through small cracks and openings to adjacent areas.
3. If ventilation is poor, use an approved air-supplied respirator.
5. Watch for fire, and keep a fire extinguisher nearby.
4. Read the Material Safety Data Sheets (MSDSs) and the
manufacturer’s instruction for metals, consumables, coatings, and
cleaners.
6. Be aware that welding on a ceiling, floor, bulkhead, or partition
can cause fire on the hidden side.
5. Work in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Shielding gases used for
welding can displace air causing injury or death. Be sure the
breathing air is safe.
6. Do not weld in locations near degreasing, cleaning, or spraying
operations. The heat and rays of the arc can react with vapors to
form highly toxic and irritating gases.
7. Do not weld on closed containers such as tanks or drums.
8. Connect work cable to the work as close to the welding area as
practical to prevent welding current from traveling long, possibly
unknown paths and causing electric shock and fire hazards.
9. Do not use welder to thaw frozen pipes.
10. Remove stick electrode from holder or cut off welding wire at
contact tip when not in use.
7. Do not weld on coated metals, such as galvanized, lead, or
cadmium plated steel, unless the coating is removed from the
weld area, the area is well ventilated, and if necessary, while
wearing an air-supplied respirator. The coatings and any metals
containing these elements can give off toxic fumes if welded.
Eye protection filter shade selector for welding or cutting
(goggles or helmet), from AWS A6.2-73.
Welding or cutting
Torch soldering
Torch brazing
Oxygen Cutting
Light
Medium
Heavy
Gas welding
Light
Medium
Heavy
Shielded metal-arc
1-2
Electrode Size
Filter
2
3 or 4
Under 1 in., 25 mm
1 to 6 in., 25-150 mm
Over 6 in., 150 mm
3 or 4
4 or 5
5 or 6
Under 1/8 in., 3 mm
1/8 to 1/2 in., 3-12 mm
Over 1/2 in., 12 mm
Under 5/32 in., 4 mm
5/32 to 1/4 in.,
Over 1/4 in., 6.4 mm
4 or 5
5 or 6
6 or 8
10
12
14
Welding or cutting
Electrode Size
Gas metal-arc
Non-ferrous base metal
All
Ferrous base metal
All
Gas tungsten arc welding
All
(TIG)
All
Atomic hydrogen welding
All
Carbon arc welding
All
Plasma arc welding
Carbon arc air gouging
Light
Heavy
Plasma arc cutting
Light Under 300 Amp
Medium 300 to 400 Amp
Heavy Over 400 Amp
Filter
11
12
12
12
12
12
12
14
9
12
14
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
WARNING
FLYING SPARKS AND HOT METAL can cause injury.
Chipping and grinding cause flying metal. As welds cool,
they can throw off slag.
1. Wear approved face shield or safety goggles. Side shields
recommended.
2. Wear proper body protection to protect skin.
WARNING
2. If used in a closed area, vent engine exhaust outside and away
from any building air intakes.
WARNING
ENGINE FUEL can cause fire or explosion.
Engine fuel is highly flammable.
1. Stop engine before checking or adding fuel.
2. Do not add fuel while smoking or if unit is near any sparks or
open flames.
3. Allow engine to cool before fueling. If possible, check and add
fuel to cold engine before beginning job.
CYLINDERS can explode if damaged.
4. Do not overfill tank — allow room for fuel to expand.
Shielding gas cylinders contain gas under high pressure.
If damaged, a cylinder can explode. Since gas cylinders
are normally part of the welding process, be sure to treat
them carefully.
5. Do not spill fuel. If fuel is spilled, clean up before starting engine.
1. Protect compressed gas cylinders from excessive heat, mechanical
shocks, and arcs.
WARNING
MOVING PARTS can cause injury.
2. Install and secure cylinders in an upright position by chaining
them to a stationary support or equipment cylinder rack to prevent
falling or tipping.
Moving parts, such as fans, rotors, and belts can cut fingers and hands
and catch loose clothing.
3. Keep cylinders away from any welding or other electrical circuits.
1. Keep all doors, panels, covers, and guards closed and
securely in place.
4. Never allow a welding electrode to touch any cylinder.
2. Stop engine before installing or connecting unit.
5. Use only correct shielding gas cylinders, regulators, hoses, and
fittings designed for the specific application; maintain them and
associated parts in good condition.
3. Have only qualified people remove guards or covers for
maintenance and troubleshooting as necessary.
6. Turn face away from valve outlet when opening cylinder valve.
4. To prevent accidental starting during servicing, disconnect
negative (-) battery cable from battery.
7. Keep protective cap in place over valve except when cylinder is in
use or connected for use.
5. Keep hands, hair, loose clothing, and tools away from moving
parts.
8. Read and follow instructions on compressed gas cylinders,
associated equipment, and CGA publication P-1 listed in Safety
Standards.
6. Reinstall panels or guards and close doors when servicing
is finished and before starting engine.
!
WARNING
Engines can be dangerous.
WARNING
SPARKS can cause BATTERY GASES TO EXPLODE;
BATTERY ACID can burn eyes and skin.
Batteries contain acid and generate explosive gases.
WARNING
1. Always wear a face shield when working on a battery.
2. Stop engine before disconnecting or connecting battery cables.
ENGINE EXHAUST GASES can kill.
3. Do not allow tools to cause sparks when working on a battery.
Engines produce harmful exhaust gases.
4. Do not use welder to charge batteries or jump start vehicles.
1. Use equipment outside in open, well-ventilated areas.
5. Observe correct polarity (+ and –) on batteries.
May 22, 2006
1-3
ARCMASTER 185 ACDC 200 ACDC
1.02
WARNING
STEAM AND PRESSURIZED HOT COOLANT can burn
face, eyes, and skin.
The coolant in the radiator can be very hot and under
pressure.
1. Do not remove radiator cap when engine is hot. Allow engine to cool.
2. Wear gloves and put a rag over cap area when removing cap.
Principal Safety Standards
Safety in Welding and Cutting, ANSI Standard Z49.1, from American
Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
Safety and Health Standards, OSHA 29 CFR 1910, from Superintendent
of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practices for the Preparation for Welding and
Cutting of Containers That Have Held Hazardous Substances, American Welding Society Standard AWS F4.1, from American Welding
Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
National Electrical Code, NFPA Standard 70, from National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
3. Allow pressure to escape before completely removing cap.
!
WARNING
This product, when used for welding or cutting, produces
fumes or gases which contain chemicals know to the
State of California to cause birth defects and, in some
cases, cancer. (California Health & Safety code Sec.
25249.5 et seq.)
NOTE
Considerations About Welding And The Effects of Low
Frequency Electric and Magnetic Fields
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P1, from Compressed Gas Association, 1235 Jefferson Davis Highway,
Suite 501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA Standard W117.2, from
Canadian Standards Association, Standards Sales, 178 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices for Occupation and Educational Eye and Face Protection, ANSI Standard Z87.1, from American National Standards Institute, 1430 Broadway, New York, NY 10018.
Cutting and Welding Processes, NFPA Standard 51B, from National
Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
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-63 (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
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.”
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 cable around the body.
4. Keep welding power source and cables as far away from
body as practical.
ABOUT PACEMAKERS:
The above procedures are among those also normally
recommended for pacemaker wearers. Consult your
doctor for complete information.
1-4
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
1.03
Precautions de Securite en Soudage à l’Arc
!
MISE EN GARDE
LE SOUDAGE A L’ARC EST DANGEREUX
PROTEGEZ-VOUS, AINSI QUE LES AUTRES, CONTRE LES BLESSURES GRAVES POSSIBLES OU LA MORT. NE LAISSEZ PAS LES ENFANTS
S’APPROCHER, NI LES PORTEURS DE STIMULATEUR CARDIAQUE (A MOINS QU’ILS N’AIENT CONSULTE UN MEDECIN). CONSERVEZ CES
INSTRUCTIONS. LISEZ LE MANUEL D’OPERATION OU LES INSTRUCTIONS AVANT D’INSTALLER, UTILISER OU ENTRETENIR CET EQUIPEMENT.
Les produits et procédés de soudage peuvent sauser des blessures graves ou la mort, de même que des dommages au reste du matériel et à la
propriété, si l’utilisateur n’adhère pas strictement à toutes les règles de sécurité et ne prend pas les précautions nécessaires.
En soudage et coupage, des pratiques sécuritaires se sont développées suite à l’expérience passée. Ces pratiques doivent être apprises par
étude ou entraînement avant d’utiliser l’equipement. Toute personne n’ayant pas suivi un entraînement intensif en soudage et coupage ne devrait
pas tenter de souder. Certaines pratiques concernent les équipements raccordés aux lignes d’alimentation alors que d’autres s’adressent aux
groupes électrogènes.
La norme Z49.1 de l’American National Standard, intitulée “SAFETY IN WELDING AND CUTTING” présente les pratiques sécuritaires à suivre.
Ce document ainsi que d’autres guides que vous devriez connaître avant d’utiliser cet équipement sont présentés à la fin de ces instructions de
sécurité.
SEULES DES PERSONNES QUALIFIEES DOIVENT FAIRE DES TRAVAUX D’INSTALLATION, DE REPARATION, D’ENTRETIEN ET D’ESSAI.
1.04
Dangers Relatifs au Soudage à l’Arc
AVERTISSEMENT
L’ELECTROCUTION PEUT ETRE MORTELLE.
6. Arrêtez tout équipement après usage. Coupez l’alimentation de
l’équipement s’il est hors d’usage ou inutilisé.
7. N’utilisez que des porte-électrodes bien isolés. Ne jamais plonger
les porte-électrodes dans l’eau pour les refroidir. Ne jamais les
laisser traîner par terre ou sur les pièces à souder. Ne touchez
pas aux porte-électrodes raccordés à deux sources de courant en
même temps. Ne jamais toucher quelqu’un d’autre avec l’électrode
ou le porte-électrode.
8. N’utilisez pas de câbles électriques usés, endommagés, mal
épissés ou de section trop petite.
9. N’enroulez pas de câbles électriques autour de votre corps.
Une décharge électrique peut tuer ou brûler gravement.
L’électrode et le circuit de soudage sont sous tension
dès la mise en circuit. Le circuit d’alimentation et les
circuits internes de l’équipement sont aussi sous tension dès la mise en marche. En soudage automatique
ou semi-automatique avec fil, ce dernier, le rouleau ou
la bobine de fil, le logement des galets d’entrainement
et toutes les pièces métalliques en contact avec le fil de
soudage sont sous tension. Un équipement
inadéquatement installé ou inadéquatement mis à la terre
est dangereux.
10. N’utilisez qu’une bonne prise de masse pour la mise à la terre de
la pièce à souder.
11. Ne touchez pas à l’électrode lorsqu’en contact avec le circuit de
soudage (terre).
12. N’utilisez que des équipements en bon état. Réparez ou remplacez
aussitôt les pièces endommagées.
13. Dans des espaces confinés ou mouillés, n’utilisez pas de source
de courant alternatif, à moins qu’il soit muni d’un réducteur de
tension. Utilisez plutôt une source de courant continu.
14. Portez un harnais de sécurité si vous travaillez en hauteur.
1. Ne touchez pas à des pièces sous tension.
15. Fermez solidement tous les panneaux et les capots.
2. Portez des gants et des vêtements isolants, secs et non troués.
3
Isolez-vous de la pièce à souder et de la mise à la terre au moyen
de tapis isolants ou autres.
4. Déconnectez la prise d’alimentation de l’équipement ou arrêtez le
moteur avant de l’installer ou d’en faire l’entretien. Bloquez le
commutateur en circuit ouvert ou enlevez les fusibles de
l’alimentation afin d’éviter une mise en marche accidentelle.
5. Veuillez à installer cet équipement et à le mettre à la terre selon le
manuel d’utilisation et les codes nationaux, provinciaux et locaux
applicables.
May 22, 2006
1-5
ARCMASTER 185 ACDC 200 ACDC
AVERTISSEMENT
AVERTISSEMENT
LE RAYONNEMENT DE L’ARC PEUT BRÛLER LES YEUX
ET LA PEAU; LE BRUIT PEUT ENDOMMAGER L’OUIE.
LES VAPEURS ET LES FUMEES SONT DANGEREUSES
POUR LA SANTE.
L’arc de soudage produit une chaleur et des rayons
ultraviolets intenses, susceptibles de brûler les yeux et
la peau. Le bruit causé par certains procédés peut
endommager l’ouïe.
Le soudage dégage des vapeurs et des fumées
dangereuses à respirer.
1. Eloignez la tête des fumées pour éviter de les respirer.
1. Portez une casque de soudeur avec filtre oculaire de nuance
appropriée (consultez la norme ANSI Z49 indiquée ci-après) pour
vous protéger le visage et les yeux lorsque vous soudez ou que
vous observez l’exécution d’une soudure.
2. Portez des lunettes de sécurité approuvées. Des écrans latéraux
sont recommandés.
3. Entourez l’aire de soudage de rideaux ou de cloisons pour protéger
les autres des coups d’arc ou de l’éblouissement; avertissez les
observateurs de ne pas regarder l’arc.
4. Portez des vêtements en matériaux ignifuges et durables (laine et
cuir) et des chaussures de sécurité.
5. Portez un casque antibruit ou des bouchons d’oreille approuvés
lorsque le niveau de bruit est élevé.
2. A l’intérieur, assurez-vous que l’aire de soudage est bien ventilée
ou que les fumées et les vapeurs sont aspirées à l’arc.
3. Si la ventilation est inadequate, portez un respirateur à adduction
d’air approuvé.
4. Lisez les fiches signalétiques et les consignes du fabricant relatives aux métaux, aux produits consummables, aux revêtements
et aux produits nettoyants.
5. Ne travaillez dans un espace confiné que s’il est bien ventilé; sinon,
portez un respirateur à adduction d’air. Les gaz protecteurs de
soudage peuvent déplacer l’oxygène de l’air et ainsi causer des
malaises ou la mort. Assurez-vous que l’air est propre à la respiration.
6. Ne soudez pas à proximité d’opérations de dégraissage, de
nettoyage ou de pulvérisation. La chaleur et les rayons de l’arc
peuvent réagir avec des vapeurs et former des gaz hautement
toxiques et irritants.
SELECTION DES NUANCES DE FILTRES OCULAIRS POUR LA PROTECTION
DES YEUX EN COUPAGE ET SOUDAGE (selon AWS á 8.2-73)
Dimension d'électrode ou
Epiasseur de métal ou
Intensité de courant
Nuance de
filtre oculaire
Brassage tendre
au chalumeau
toutes conditions
2
Brassage fort
au chalumeau
toutes conditions
3 ou 4
Opération de coupage
ou soudage
Soudage á l'arc sous gaz
avec fil plein (GMAW)
métaux non-ferreux
toutes conditions
11
métaux ferreux
toutes conditions
12
toutes conditions
12
toutes conditions
12
toutes conditions
12
toutes dimensions
12
Oxycoupage
mince
moins de 1 po. (25 mm)
moyen de 1 á 6 po. (25 á 150 mm)
épais
plus de 6 po. (150 mm)
3 ou 4
4 ou 5
5 ou 6
Soudage aux gaz
Dimension d'électrode ou
Nuance de
Epiasseur de métal ou
filtre oculaire
Intensité de courant
Opération de coupage
ou soudage
Soudage á l'arc sous gaz avec
électrode de tungstène (GTAW)
Soudage á l'hydrogène
atomique (AHW)
Soudage á l'arc avec
électrode de carbone (CAW)
Soudage á l'arc Plasma (PAW)
mince
moins de 1/8 po. (3 mm)
moyen de 1/8 á 1/2 po. (3 á 12 mm)
épais
Soudage á l'arc avec
électrode enrobees
(SMAW)
4 ou 5
Gougeage Air-Arc avec
électrode de carbone
5 ou 6
mince
12
plus de 1/2 po. (12 mm)
6 ou 8
épais
14
moins de 5/32 po. (4 mm)
10
5/32 á 1/4 po. (4 á 6.4 mm)
12
mince
moins de 300 amperès
9
plus de 1/4 po. (6.4 mm)
14
moyen
de 300 á 400 amperès
12
plus de 400 amperès
14
Coupage á l'arc Plasma (PAC)
épais
1-6
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
7. Ne soudez des tôles galvanisées ou plaquées au plomb ou au
cadmium que si les zones à souder ont été grattées à fond, que si
l’espace est bien ventilé; si nécessaire portez un respirateur à adduction d’air. Car ces revêtements et tout métal qui contient ces
éléments peuvent dégager des fumées toxiques au moment du
soudage.
AVERTISSEMENT
AVERTISSEMENT
LES ETINCELLES ET LES PROJECTIONS BRULANTES
PEUVENT CAUSER DES BLESSURES.
Le piquage et le meulage produisent des particules
métalliques volantes. En refroidissant, la soudure peut
projeter du éclats de laitier.
LE SOUDAGE PEUT CAUSER UN INCENDIE OU UNE
EXPLOSION
1. Portez un écran facial ou des lunettes protectrices
approuvées. Des écrans latéraux sont recommandés.
L’arc produit des étincellies et des projections. Les
particules volantes, le métal chaud, les projections de
soudure et l’équipement surchauffé peuvent causer un
incendie et des brûlures. Le contact accidentel de
l’électrode ou du fil-électrode avec un objet métallique
peut provoquer des étincelles, un échauffement ou un
incendie.
2. Portez des vêtements appropriés pour protéger la peau.
1. Protégez-vous, ainsi que les autres, contre les étincelles et du
métal chaud.
2. Ne soudez pas dans un endroit où des particules volantes ou des
projections peuvent atteindre des matériaux inflammables.
3. Enlevez toutes matières inflammables dans un rayon de 10, 7
mètres autour de l’arc, ou couvrez-les soigneusement avec des
bâches approuvées.
4. Méfiez-vous des projections brulantes de soudage susceptibles
de pénétrer dans des aires adjacentes par de petites ouvertures
ou fissures.
5. Méfiez-vous des incendies et gardez un extincteur à portée de la
main.
6. N’oubliez pas qu’une soudure réalisée sur un plafond, un plancher,
une cloison ou une paroi peut enflammer l’autre côté.
7. Ne soudez pas un récipient fermé, tel un réservoir ou un baril.
8. Connectez le câble de soudage le plus près possible de la zone
de soudage pour empêcher le courant de suivre un long parcours
inconnu, et prévenir ainsi les risques d’électrocution et d’incendie.
AVERTISSEMENT
LES BOUTEILLES ENDOMMAGEES PEUVENT
EXPLOSER
Les bouteilles contiennent des gaz protecteurs sous
haute pression. Des bouteilles endommagées peuvent
exploser. Comme les bouteilles font normalement partie
du procédé de soudage, traitez-les avec soin.
1. Protégez les bouteilles de gaz comprimé contre les sources de
chaleur intense, les chocs et les arcs de soudage.
2. Enchainez verticalement les bouteilles à un support ou à un cadre
fixe pour les empêcher de tomber ou d’être renversées.
3. Eloignez les bouteilles de tout circuit électrique ou de tout soudage.
4. Empêchez tout contact entre une bouteille et une électrode de
soudage.
5. N’utilisez que des bouteilles de gaz protecteur, des détendeurs,
des boyauxs et des raccords conçus pour chaque application
spécifique; ces équipements et les pièces connexes doivent être
maintenus en bon état.
6. Ne placez pas le visage face à l’ouverture du robinet de la bouteille
lors de son ouverture.
9. Ne dégelez pas les tuyaux avec un source de courant.
10. Otez l’électrode du porte-électrode ou coupez le fil au tube-contact lorsqu’inutilisé après le soudage.
11. Portez des vêtements protecteurs non huileux, tels des gants en
cuir, une chemise épaisse, un pantalon revers, des bottines de
sécurité et un casque.
7. Laissez en place le chapeau de bouteille sauf si en utilisation ou
lorsque raccordé pour utilisation.
8. Lisez et respectez les consignes relatives aux bouteilles de gaz
comprimé et aux équipements connexes, ainsi que la publication
P-1 de la CGA, identifiée dans la liste de documents ci-dessous.
AVERTISSEMENT
LES MOTEURS PEUVENT ETRE DANGEREUX
LES GAZ D’ECHAPPEMENT DES MOTEURS PEUVENT
ETRE MORTELS.
Les moteurs produisent des gaz d’échappement nocifs.
May 22, 2006
1-7
ARCMASTER 185 ACDC 200 ACDC
1. Utilisez l’équipement à l’extérieur dans des aires ouvertes et bien
ventilées.
Les accumulateurs contiennent de l’électrolyte acide et
dégagent des vapeurs explosives.
2. Si vous utilisez ces équipements dans un endroit confiné, les
fumées d’échappement doivent être envoyées à l’extérieur, loin
des prises d’air du bâtiment.
1. Portez toujours un écran facial en travaillant sur un accumu-lateur.
AVERTISSEMENT
LE CARBURANT PEUR CAUSER UN INCENDIE OU UNE
EXPLOSION.
Le carburant est hautement inflammable.
2. Arrêtez le moteur avant de connecter ou de déconnecter des câbles
d’accumulateur.
3. N’utilisez que des outils anti-étincelles pour travailler sur un
accumulateur.
4. N’utilisez pas une source de courant de soudage pour charger
un accumulateur ou survolter momentanément un véhicule.
5. Utilisez la polarité correcte (+ et –) de l’accumulateur.
1. Arrêtez le moteur avant de vérifier le niveau e carburant ou de
faire le plein.
2. Ne faites pas le plein en fumant ou proche d’une source d’étincelles
ou d’une flamme nue.
AVERTISSEMENT
3. Si c’est possible, laissez le moteur refroidir avant de faire le plein
de carburant ou d’en vérifier le niveau au début du soudage.
LA VAPEUR ET LE LIQUIDE DE REFROIDISSEMENT
BRULANT SOUS PRESSION PEUVENT BRULER LA
PEAU ET LES YEUX.
4. Ne faites pas le plein de carburant à ras bord: prévoyez de l’espace
pour son expansion.
Le liquide de refroidissement d’un radiateur peut être
brûlant et sous pression.
5. Faites attention de ne pas renverser de carburant. Nettoyez tout
carburant renversé avant de faire démarrer le moteur.
1. N’ôtez pas le bouchon de radiateur tant que le moteur n’est pas
refroidi.
AVERTISSEMENT
DES PIECES EN MOUVEMENT PEUVENT CAUSER DES
BLESSURES.
Des pièces en mouvement, tels des ventilateurs, des
rotors et des courroies peuvent couper doigts et mains,
ou accrocher des vêtements amples.
1. Assurez-vous que les portes, les panneaux, les capots et les
protecteurs soient bien fermés.
2. Avant d’installer ou de connecter un système, arrêtez le moteur.
3. Seules des personnes qualifiées doivent démonter des protecteurs
ou des capots pour faire l’entretien ou le dépannage nécessaire.
4. Pour empêcher un démarrage accidentel pendant l’entretien,
débranchez le câble d’accumulateur à la borne négative.
5. N’approchez pas les mains ou les cheveux de pièces en
mouvement; elles peuvent aussi accrocher des vêtements amples
et des outils.
6. Réinstallez les capots ou les protecteurs et fermez les portes après
des travaux d’entretien et avant de faire démarrer le moteur.
AVERTISSEMENT
DES ETINCELLES PEUVENT FAIRE EXPLOSER UN
ACCUMULATEUR; L’ELECTROLYTE D’UN ACCUMULATEUR PEUT BRULER LA PEAU ET LES YEUX.
1-8
2. Mettez des gants et posez un torchon sur le bouchon pour l’ôter.
3. Laissez la pression s’échapper avant d’ôter complètement le
bouchon.
1.05
Principales Normes de Securite
Safety in Welding and Cutting, norme ANSI Z49.1, American Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33128.
Safety and Health Standards, OSHA 29 CFR 1910, Superintendent of
Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practices for the Preparation for Welding and
Cutting of Containers That Have Held Hazardous Substances, norme
AWS F4.1, American Welding Society, 550 N.W. LeJeune Rd., Miami,
FL 33128.
National Electrical Code, norme 70 NFPA, National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders, document P-1,
Compressed Gas Association, 1235 Jefferson Davis Highway, Suite
501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, norme CSA W117.2 Association canadienne de normalisation, Standards Sales, 276 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices for Occupation and Educational Eye and Face Protection, norme ANSI Z87.1, American National Standards Institute, 1430
Broadway, New York, NY 10018.
Cutting and Welding Processes, norme 51B NFPA, National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 2:
INTRODUCTION
2.01 How To Use This Manual
This Service Manual applies to just specification or part
numbers listed on page i.
To ensure safe operation, read the entire manual, including
the chapter on safety instructions and warnings.
2.02 Equipment Identification
The unit’s identification number (specification or part
number), model, and serial number usually appear on a
nameplate attached to the rear panel. In some cases, the
nameplate may be attached to the control panel.
Equipment which does not have a name plate such as
gun and cable assemblies is identified only by the
specification or part number printed on the shipping
container. Record these numbers on the bottom of page
i for future reference.
Throughout this manual, the words WARNING,
CAUTION, and NOTE may appear. Pay particular attention
to the information provided under these headings. These
special annotations are easily recognized as
follows:
!
WARNING
A WARNING gives information regarding
possible personal injury.
CAUTION
A CAUTION refers to possible equipment
damage.
NOTE
A NOTE offers helpful information concerning
certain operating procedures.
Additional copies of this manual may be purchased by
contacting Thermal Arc at the address and phone number
in your area listed in the inside back cover of this manual.
Include the manual number and equipment
identification numbers.
Electronic copies of this manual can also be downloaded
at no charge in Acrobat PDF format by going to the
Thermal Arc web site listed below and clicking on the
Literature Library link:
http://www.thermalarc.com
May 22, 2006
2-1
ARCMASTER 185 ACDC 200 ACDC
2.04 Symbol Chart
Note that only some of these symbols will appear on your model.
On
Single Phase
Wire Feed Function
Off
Three Phase
Wire Feed Towards
Workpiece With
Output Voltage Off.
Dangerous Voltage
Three Phase Static
Frequency ConverterTransformer-Rectifier
Welding Gun
Increase/Decrease
Remote
Purging Of Gas
Duty Cycle
Continuous Weld
Mode
Percentage
Spot Weld Mode
Circuit Breaker
AC Auxiliary Power
2-2
Spot Time
Fuse
Panel/Local
Amperage
Shielded Metal
Arc Welding (SMAW)
Voltage
Gas Metal Arc
Welding (GMAW)
Hertz (cycles/sec)
Gas Tungsten Arc
Welding (GTAW)
Frequency
Air Carbon Arc
Cutting (CAC-A)
Negative
Constant Current
Positive
Constant Voltage
Or Constant Potential
Direct Current (DC)
High Temperature
Protective Earth
(Ground)
Fault Indication
Line
Arc Force
IPM
Inches Per Minute
Line Connection
Touch Start (GTAW)
MPM
Meters Per Minute
Auxiliary Power
Variable Inductance
Receptacle RatingAuxiliary Power
V
Voltage Input
t
Preflow Time
t1
t2
Postflow Time
2 Step Trigger
Operation
Press to initiate wirefeed and
welding, release to stop.
4 Step Trigger
Operation
Press and hold for preflow, release
to start arc. Press to stop arc, and
hold for preflow.
t
Burnback Time
Disturbance In
Ground System
Remote Control
(Panel / Remote)
Art # A-04130
115V 15A
X
%
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
2.05 Description
The Thermal Arc™ Model 185/200 ACDC are self-contained single (185/200 ACDC) and three -phase (200 ACDC) AC/
DC arc welding powersource with Constant Current (CC) output characteristics. These units are equipped with a
Digital Volt/Amperage Meter, gas control valve, built in Sloper and Pulser, lift arc starter, and high-frequency arc
starter for use with Gas Tungsten Arc Welding (GTAW), Gas Tungsten Arc Welding-Pulsed (GTAW-P) Gas Tungsten
Arc Welding-Sloped (GTAW-S), and Shielded Metal Arc Welding (SMAW) pr ocesses. The power source is totally enclosed in an impact resistant, flame retardant and non-conductive plastic case.
NOTE
Volt-Ampere curves show the maximum Voltage and Amperage output capabilities of the welding power
source. Curves of other settings will fall between the curves shown.
(V)
OCV
5A
160A
(A)
STICK Process
■ 185ACDC
(V)
OCV
(V)
OCV
10V
25A
185A
(A)
185A
5A
LIFT TIG Process
(A)
HF TIG Process
■ 200ACDC
(V)
OCV
(V)
OCV
5A
200A
LIFT TIG Process
(A)
5A
200A
(A)
HF TIG Process
Figure 2-1: Figure 2-1: Model 185/200ACDC Volt-Ampere curve
May 22, 2006
2-3
ARCMASTER 185 ACDC 200 ACDC
2.06 Functional Block Diagrams
Figure 2-2 illustrates the functional block diagram of the 185/200ACDC-power supply.
Input
Power
Main
Circuit
Breaker
Input
Diode
Inrush Current
Suppresor
Capacitor
IGBT Inverter
Module
Output
Diodes
Thermal
Sensor
Control
Transformer
(-c Config.)
Primary
Current
Sensor
Drive Circuit
DC Power
Supply for
Control Circuit
Output
Transformers
Thermal
Sensor
Circuit
Voltage Sensor
Current
Coupling
Transformer
(CT-1)
Coil
+
Lift Tig Mode
Output Short
Sensing Circuit
Output
Inductor
–
To each control circuit
+12VDC +20VDC
+24VDC +5VDC
Trouble
Sensing
Circuit
Torch Control
Connection
(CON1)
Sequence
Control
+
–
+
Output
Voltage
Sensor
Reference
Adjustments &
Control Switches
Current
Adjustment
Circuit
Art: A-04949
Figure 2-2: 185/200ACDC Model Functional Block Diagram
2-4
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
2.07 Transporting Methods
These units are equipped with a handle for carrying
purposes.
!
WARNING
ELECTRIC SHOCK can kill.
• DO NOT TOUCH live electrical parts.
• Disconnect input power conductors from deenergized supply line before moving welding power
source.
!
WARNING
FALLING EQUIPMENT can cause serious
personal injury and equipment damage.
• Lift unit with handle on top of case.
• Use hand cart or similar device of adequate capacity.
• If using a fork lift vehicle, place and secure unit on a
proper skid before transporting.
May 22, 2006
2-5
ARCMASTER 185 ACDC 200 ACDC
2-6
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 3:
INSTALLATION
3.01 Environment
The ARC MASTER 185 ACDC / 200 ACDC is designed for
use in adverse environments. Examples of environments
with increased adverse conditions are:
a. In locations in which freedom of movement is
restricted, so that the operator is forced to
perform the work in a cramped (kneeling, sitting
or lying) position with physical contact with
conductive parts;
b. In locations which are fully or partially limited by
conductive elements, and in which there is a high
risk of unavoidable or accidental contact by the
operator, or
c. In wet or damp hot locations where humidity or
perspiration considerably reduces the skin
resistance of the human body and the insulation
properties of accessories.
Environments with adverse conditions do not include
places where electrically conductive parts are in the near
vicinity of the operator, which can cause increased hazard,
have been insulated.
3.02 Location
Be sure to locate the welder according to the following
guidelines:
3.03 Electrical Input Connections
!
WARNING
ELECTRIC SHOCK can kill; SIGNIFICANT DC
VOLTAGE is present after removal of input
power. DO NOT TOUCH live electrical parts.
SHUT DOWN welding power source, disconnect input
power employing lockout/tagging procedures. Lockout/
tagging procedures consist of padlocking line disconnect
switch in open position, removing fuses from fuse box,
or shutting off and red-tagging circuit breaker or other
disconnecting device.
3.04 Electrical Input Requirement
Operate the welding power source from a single phase
(185/200 ACDC) or a three phase (200 ACDC) 50/60 Hz,
AC power supply. The input voltage must match one of
the electrical input voltages shown on the input data label
on the unit nameplate. Contact the local electric utility
for information about the type of electrical service
available, how proper connections should be made, and
any inspection required.
The line disconnect switch provides a safe and convenient
means to completely remove all electrical power from
the welding power supply whenever necessary to inspect
or service the unit.
NOTE
• In areas, free from oil, steam and corrosive gases.
These units are equipped with a threeconductor with earth power cable that is
connected at the welding power source end
for single and three phase electrical input
power.
• In areas, not subjected to abnormal vibration or
shock.
Do not connect an input (WHITE or BLACK or
RED) conductor to the ground terminal.
• In areas, not exposed to direct sunlight or rain.
Do not connect the ground (GREEN)
conductor to an input line terminal.
• In areas, free from moisture and dust.
• Ambient temperature between 0 degrees C to 40
degrees C.
• Place at a distance of 12" (304.79mm) or more from
walls or similar boundaries that could restrict natural
airflow for cooling.
!
WARNING
Thermal Arc advises that this equipment be
electrically connected by a qualified electrician.
May 22, 2006
3-1
ARCMASTER 185 ACDC 200 ACDC
NOTE
[For 185 ACDC]
Do not connect an input (WHITE and BLACK) conductor
to the ground terminal. Do not connect the ground
(GREEN) conductor to an input line terminal.
Refer to figure 3-1 and:
1. Connect end of ground (GREEN) conductor to a
suitable ground. Use a grounding method that
complies with all applicable electrical codes.
2. Connect ends of line 1 (BLACK) and line 2 (WHITE)
input conductors to a de-energized line disconnect
switch.
3. Use Table 3-1 and Table 3-3 as a guide to select
line fuses for the disconnect switch.
For single phase operation, connect the
GREEN, BLACK and WHITE input conductors.
Isolate the RED conductor as it is not used for
single phase operation.
NOTE
Fuse size is based on not more than 200
percent of the rated input amperage of the
welding power source (Based on Article 630,
National Electrical Code).
Welding Power Supply
Ground Terminal
Ground Conductor
Line Disconnect
Switch
[For 200 ACDC]
Do not connect an input (WHITE or BLACK or RED)
conductor to the ground terminal. Do not connect the
ground (GREEN) conductor to an input line terminal.
Line Fuse
Primary Power Cable
Refer to figure 3-2 and:
1. Connect end of ground (GREEN) conductor to a
suitable ground. Use a grounding method that
complies with all applicable electrical codes.
Figure 3-1: Electrical Input Connections
2. Connect ends of line 1 (BLACK) and line 2 (WHITE)
and line 3 (RED) input conductors to a deenergized line disconnect switch.
3. Use Table 3-2 and Table 3-4 as a guide to select
line fuses for the disconnect switch.
Input Voltage
208V
230V
Fuse Size
60 Amps
50 Amps
Welding Power Supply
Ground Terminal
Ground Conductor
Line Disconnect
Switch
Line Fuse
Primary Power Cable
Table 3-1: Electrical Input Connections 185 ACDC
Figure 3-2: Electrical Input Connections
Input Voltage
208V
230V
460V
Fuse Size
75 Amps
60 Amps
30 Amps
Table 3-2: Electrical Input Connections 200ACDC
3-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
3.05 Input Power
Each unit incorporates an INRUSH circuit and input
voltage sensing circuit. When the MAIN CIRCUIT SWITCH
is turned on, the inrush circuit provides a pre-charging of
the input capacitors. At this point, the Bus Voltages are
checked and the welder is enabled after the input
capacitors have charged to full operating voltage (after
approximately 5 seconds).
185 ACDC NOTE
Note the available input power. Damage to the
welder could occur if 460VAC or higher
applied.
Model
Primary
Supply
Minimum
Primary
Lead
Size
(Factory
Fitted)
Current
Circuit Size
Model
ARC
MASTER
185ACDC
Minimum
Primary
Current
Circuit Size
(Vin/Amps)
12/3
AWG
minimum
1φ
208/33
230/30
208/44
230/40
Current & Duty Cycle
TIG
STICK
[email protected]%
-
-
[email protected]%
Table 3-3: 208-230V Primary Current Circuit sizes to
achieve maximum current
200 ACDC NOTE
Note the available input power. Damage to the
welder could occur if 575VAC or higher is
applied.
The following 208-230/460V Primary Current
recommendations are required to obtain the maximum
welding current and duty cycle from this welding
equipment:
TIG
STICK
(Vin/Amps)
208/17
3φ
ARC
MASTER
200ACDC
208/37
1φ
[email protected]%
-
-
[email protected]%
208/20
8/4 AWG
minimum
The following 208-230V Primary Current
recommendations are required to obtain the maximum
welding current and duty cycle from this welding
equipment:
Primary
Supply
Lead
Size
(Factory
Fitted)
Current & Duty Cycle
208/44
[email protected]%
-
-
[email protected]%
Table 3-4: 208-230/460V Primary Current Circuit sizes
to achieve maximum current
3.06 High Frequency Introduction
The importance of correct installation of high frequency
welding equipment cannot be over-emphasized.
Interference due to high frequency initiated or stabilized
arc is almost invariably traced to improper installation.
The following information is intended as a guide for
personnel installing high frequency welding machines.
!
WARNING: Explosives
The high frequency section of this machine
has an output similar to a radio transmitter.
The machine should NOT be used in the vicinity
of blasting operations due to the danger of
premature firing.
!
WARNING: Computers
It is also possible that operation close to
computer installations may cause computer
malfunction.
May 22, 2006
3-3
ARCMASTER 185 ACDC 200 ACDC
3.07 High Frequency Interference
3.08 Duty Cycle
Interference may be transmitted by a high frequency
initiated or stabilized arc welding machine in the following
ways:
The duty cycle of a welding power source is the percentage
of a ten (10) minute period that it can be operated at a
given output without causing overheating and damage to
the unit. If the welding amperes decrease, the duty cycle
increases. If the welding amperes are increased beyond
the rated output, the duty cycle will decrease.
1. Direct Radiation: Radiation from the machine can
occur if the case is metal and is not properly
grounded. It can occur through apertures such
as open access panels. The shielding of the high
frequency unit in the Power Source will prevent
direct radiation if the equipment is properly
grounded.
2. Transmission via the Supply Lead: Without
adequate shielding and filtering, high frequency
energy may be fed to the wiring within the
installation (mains) by direct coupling. The energy
is then transmitted by both radiation and
conduction. Adequate shielding and filtering is
provided in the Power Source.
3. Radiation from Welding Leads: Radiated
interference from welding leads, although
pronounced in the vicinity of the leads, diminishes
rapidly with distance. Keeping leads as short as
possible will minimize this type of interference.
Looping and suspending of leads should be
avoided where possible.
4. Re-radiation from Unearthed Metallic Objects: A
major factor contributing to interference is reradiation from unearthed metallic objects close
to the welding leads. Effective grounding of such
objects will prevent re-radiation in most cases.
3-4
!
WARNING
Exceeding the duty cycle ratings will cause the
thermal overload protection circuit to become
energized and shut down the output until the
unit has cooled to normal operating
temperature.
CAUTION
Continually exceeding the duty cycle ratings
can cause damage to the welding power
source and will void the manufactures
warranty.
NOTE
Due to variations that can occur in
manufactured products, claimed performance,
voltages, ratings, all capacities,
measurements, dimensions and weights
quoted are approximate only. Achievable
capacities and ratings in use and operation will
depend upon correct installation, use,
applications, maintenance and service.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
3.09 Specifications
Parameter
Rated Output
Amperes
Volts
Duty Cycle
Duty Cycle
TI G
185ACDC
185
18
30%
185A/[email protected]%
160A/[email protected]%
100A/[email protected]%
STICK
Output Current
Range
TIG
STICK
Open Circuit Voltage
Width
Dimensions
Height
Length
Weight
Rated Input Voltage
[email protected]
Load
Output Amperes
Output Volts
Duty Cycle
KVA
KW
[email protected] Load KVA
KW
Input Volts Three Phase
208V
200ACDC
200
18
20%
200A/[email protected]%
160A/[email protected]%
130A/[email protected]%
100A/[email protected]%
160A/[email protected]%
130A/[email protected]%
100A/[email protected]%
5–185 (DC)
5–200 (DC)
5–185 (AC)@60Hz, 50% Cleaning
5–200 (AC)@60Hz, 50% Cleaning
5–160 (DC)
5–160 (AC)@60Hz, 50% Cleaning
65V
7.08” (180mm)
14.7” (360mm)
16.54” (420mm)
37.4 lb. 17 kg
Single-phase
Three-phase
Single-phase
160A
160A
160A
27V
27V
27V
40%
40%
40%
9 .0
7.2
9 .0
5.4
5.4
5.4
0 .5
0.5
0 .5
0.3
0.3
0.3
Amperage Draw
Amperage Draw
No Load Amps
No Load Amps
@Rated Load
@Rated Load
20
1 .4
230V
460V
Input Volts Single
Phase
208V
230V
44
40
2.5
2.2
19
10
1 .3
0 .7
44
40
2 .5
2 .2
Thermal Arc continuously strives to produce the best product possible and therefore reserves the right to change, improve or revise the specifications
or design of this or any product without prior notice. Such updates or changes do not entitle the buyer of equipment previously sold or shipped to the
corresponding changes, updates, improvements or replacement of such items.
The values specified in the table above are optimal values, your values may differ. Individual equipment may differ from the above specifications due
to in part, but not exclusively, to any one or more of the following; variations or changes in manufactured components, installation location and
conditions and local power grid supply conditions.
May 22, 2006
3-5
ARCMASTER 185 ACDC 200 ACDC
3-6
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 4:
OPERATOR CONTROLS
4.01 ArcMaster 185/200 ACDC Controls
1
1. Control Knob: This control sets the selected weld parameter, rotating it clockwise increases the parameter that is indicated on the digital meter. Pushing the
knob inward displays the actual welding voltage.
2. Remote Control Socket: The 8 pin Remote Control
Socket is used to connect remote current control devices to the welding Power Source. To make connections, align keyway, insert plug, and rotate threaded
collar fully clockwise.
GND
2
360
2
5
3
1
12 3456 78
5
4
3
8
7
6
15
4
Fr ont vi ew 8-Socket R eceptacle
180
420
5k Ohms
Figure 4-2: 8-Socket Receptacle
Socket
Pin
1
Earth (Ground)
2
Torch Switch Input (24V) to (connect pins 2
& 3 to turn on welding current)
3
Torch Switch Input (0V) to energize weld
current (connect pins 2 & 3 to turn on
welding current)
4
Connect pin 4 to pin 8 to instruct machine
that a remote current control device is
connected (12V DC supply)
5
5k ohm (maximum) connection to 5k ohm
remote control potentiometer
6
Zero ohm (minimum) connection to 5k ohm
remote control potentiometer
6
8
7
7
8
9
Function
Wiper arm connection to 5k ohm remote
control potentiometer
Connect pin 4 to pin 8 to instruct machine
that a remote current control device is
connected (0V)
Table 4-1: Socket Pin Functions
Figure 4-1: ARC MASTER 185/200ACDC Power Source
May 22, 2006
4-1
ARCMASTER 185 ACDC 200 ACDC
3. Positive Terminal: Welding current flows from the
Power Source via heavy duty Dinse type terminal (Size
50mm). It is essential, however, that the male plug is
inserted and turned securely to achieve a sound electrical connection.
4. Negative Terminal: Welding current flows from the
Power Source via heavy duty Dinse type terminal (Size
50mm). It is essential, however, that the male plug is
inserted and turned securely to achieve a sound electrical connection.
4.02 Weld Process Selection
Parameter
Weld Mode
HF LIFT
STICK
TIG TIG
STD
Yes
Yes
Yes
No
Yes
Yes
SLOPE
CAUTION
REPEAT
Loose welding terminal connections can cause
overheating and result in the male plug being
fused in the bayonet terminal.
5. Gas Outlet: The Gas Outlet is a 5/8 18 UNF female
gas fitting.
6. ON/OFF Switch: This switch connects the Primary
supply voltage to the inverter when in the ON position. This enables the Power Supply.
!
DC
WARNING
When the welder is connected to the Primary
supply voltage, the internal electrical components may be at 720V potential with respect
to earth.
7. Input Cable: The input cable connects the Primary
supply voltage to the equipment.
8. SMART Logic Switch: Manual slide switch mounted
on the back panel selects for proper input voltage. If
this slide is not set to the position that matches the
input voltage from the electrical source the Smart
Logic circuit will inhibit welding power source output.
The digital meter will show primary input error code.
* 200ACDC only.
AC/DC
AC
2T operation in TIG
Modes using remote
devices to control
contactor & current.
4T operation in TIG
Modes with crater fill
using a remote contactor
device to control
sequence.
No
Yes
Yes
4T operation in TIG
Modes with repeat
operation and crater fill
using a remote contactor
device.
No
Yes
No
2T operation spot welding
in HF TIG using a remote
contactor device.
No
Yes
Yes
Pulse operation in TIG
Modes.
Yes
Yes
Yes
Selects AC or DC weld
current.
Yes
No
Yes
Contactor operation in
Stick Mode.
Yes
Yes
Yes
Selects mode of operation
Panel or Remote.
SPOT
PULSE
ON/OFF
Description
CONTACTOR
ON/OFF
Operation
PANEL/
REMOTE
Table 4-2: Weld Process selection verses Weld Mode
for ARC MASTER 185 / 200ACDC
9. Gas Inlet: The Gas Inlet is a 5/8 18 UNF female gas
fitting.
4-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
4.03 Weld Parameter Descriptions for ARC MASTER 185/200 ACDC
Figure 4-3: ARC MASTER 185/200 ACDC Front Panel with Parameter Description
Parameter
PRE-FLOW
Description
This parameter operates in TIG modes only and is used to provide gas to the weld zone prior
to striking the arc, once the torch trigger switch has been pressed. This control is used to
dramatically reduce weld porosity at the start of a weld.
This parameter operates in all weld modes except Lift TIG mode and is used to heat up the
weld
zone in TIG modes or improve the start characteristics for stick electrodes. e.g. low hydrogen
HOT START
electrodes. It sets the peak start current on top of the BASE (WELD) current.
e.g. HOT START current = 130 amps when BASE (WELD) = 100 amps & HOT START
= 30 amps
INITIAL CUR.
This parameter operates in SLOPE or REPEAT (4T) TIG modes only and is used to set the
start
current for TIG. The Start Current remains on until the torch trigger switch is released after it
has
been depressed.
UP SLOPE
This parameter operates in TIG modes only and is used to set the time for the weld current to
ramp up, after the torch trigger switch has been pressed then released, from INITIAL CUR to
PEAK or BASE current
PEAK CUR.
This parameter sets the PEAK weld current when in PULSE mode
WELD
This parameter sets the TIG WELD current in STD, SLOPE, REPEAT and SPOT modes when
PULSE is off. This parameter also sets the STICK weld current.
BASE (Background
Current)
This parameter sets the Background current when in Pulse TIG mode.
SPOT TIME
This parameter sets the duration of the SPOT TIME in HF TIG mode only
PULSE WIDTH
This parameter sets the percentage on time of the PULSE FREQUENCY for PEAK weld
current when the PULSE is on.
PULSE FREQ.
This parameter sets the PULSE FREQUENCY when the PULSE is on.
AC FREQUENCY
This parameter operates in AC mode only and is used to set the frequency for the AC weld
current.
May 22, 2006
4-3
ARCMASTER 185 ACDC 200 ACDC
Parameter
WAVE BALANCE
Description
This parameter is used for aluminium AC TIG mode and is used to set the penetration to
cleaning action ratio for the AC weld current.
Generally WAVE BALANCE is set to 50% for AC STICK welding. The WAVE BALANCE control
changes the ratio of penetration to cleaning action of the AC TIG welding arc. Maximum weld
penetration is achieved when the WAVE BALANCE control is set to 10%. Maximum cleaning of
heavily oxidised aluminum or magnesium alloys is achieved when the WAVE BALANCE control
is set to 65%.
WAVE BALANCE=50%
WAVE BALANCE=10%
10%
(+)
50%
50%
(-)
Balanced with 50% penetration
and 50% cleaning
(+)
WAVE BALANCE=65%
(+)
65%
90%
(-)
Maximum Penetration and
reduced cleaning
35%
(-)
Maximum Cleaning and
reduced penetration
DOWN SLOPE
This parameter operates in TIG modes only and is used to set the time for the weld current to
ramp down, after the torch trigger switch has been pressed, to CRATER CUR. This control is
used to eliminate the crater that can form at the completion of a weld.
CRATER CUR.
This parameter operates in SLOPE or REPEAT (4T) TIG modes only and is used to set the finish
current for TIG. The CRATER Current remains on until the torch trigger switch is released after it
has been depressed.
POST-FLOW
t2
SAVE
LOAD
SAUVEGARDER CHARGER
This parameter operates in TIG modes only and is used to adjust the post gas flow time once the
arc has extinguished. This control is used to dramatically reduce oxidation of the tungsten
electrode.
The SAVE/LOAD buttons are used to save and retrieve a total number of 5 programs into the
185/200ACDC memory.
Table 4-3: (Continued) Weld Parameter Descriptions for ARC MASTER 185/200 ACDC
4-4
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
4.04 Weld Parameters for ARC MASTER 185/200 ACDC
Weld Parameter
PRE-FLOW
HOT START
INITIAL CUR.
UP SLOPE
PULSE PEAK CUR.
PULSE BASE CUR.
WELD CUR. (TIG)
WELD CUR. (STICK)
SPOT TIME
Parameter Range
Factory Setting
Incremental Unit
0.0 to 1.0 sec
0 sec
0 to 70A
Weld Mode
STICK
HF TIG
LIFT TIG
0.1 sec
No
Yes
Yes
20 A
1A
Yes
Yes
No
30 A
1A
No
Yes
Yes
1 sec
0.1 sec
No
Yes
Yes
120 A
1A
No
Yes
Yes
80 A
1A
No
Yes
Yes
80 A
1A
No
Yes
Yes
5 to 160 A
80 A
1A
Yes
No
No
5 to 185A * 1
5 to 200A * 2
0 to 15 sec
5 to 185A
*1
5 to 200A * 2
5 to 185A * 1
5 to 200A * 2
5 to 185A * 1
5 to 200A * 2
0.5 to 5.0 sec
2 sec
0.1 sec
No
Yes
Yes
PULSE WIDTH
15 to 80 %
50%
1%
No
Yes
Yes
PULSE FREQ.
0.5 to 500 Hz
100.0Hz
See Table Table 4-5
No
Yes
Yes
AC FREQUENCY
15 to 150 Hz
60Hz
1Hz
Yes
Yes
Yes
WAVE BALANCE
10 to 65%
50%
1%
Yes
Yes
Yes
DOWN SLOPE
0 to 25 sec
3 sec
0.1 sec
No
Yes
Yes
30 A
1A
No
Yes
Yes
10 sec
0.1 sec
No
Yes
Yes
CRATER CUR.
POST-FLOW
5 to 185A
*1
5 to 200A * 2
0.0 to 60 sec
* 1: 185ACDC
* 2: 200ACDC
Table 4-4: Weld Parameters for ARC MASTER 200 ACDC
PULSE FREQ. Range
Incremental Unit
0.5 to 20Hz
0.1Hz
20 to 100Hz
1Hz
100 to 500Hz
5Hz
Table 4-5: PULSE FREQ. Range and Incremental Units
May 22, 2006
4-5
ARCMASTER 185 ACDC 200 ACDC
4.05 Power Source Features
Feature
New Digital Control
Description
Almost All welding parameters are adjustable.
Touch Panel Switches
Touch switches eliminate mechanical damage.
Front Control Cover
Protects front panel controls.
Digital Meter
Displays selected weld parameter value. Displays weld current when welding. Displays
weld current for 20 seconds after weld has been completed. A selected weld parameter
value can be adjusted at any time even while welding.
Intelligent Fan Control
The intelligent cooling system is designed to reduce dust and foreign material build-up,
whilst providing optimum cooling. Fan speed reduces approximately 30 seconds after
machine is turned on. Fan speed increases when internal components reach operating
temperature.
ON/OFF switch
Primary voltage Supply ON/OFF switch located on rear panel.
Voltage Reduction Device
(VRD)
Control Knob
Reduces the OCV when the power supply is not in use. Eliminates the need for add on
voltage reducers and has no effect on arc starting. VRD fully complies with IEC 60974-1.
When Stick mode is selected the green VRD light is ON when not welding and red when
welding. When in TIG modes VRD is off.
For the selected weld parameter, rotating the knob clockwise increases the parameter.
Rotating the knob counter-clockwise decreases the parameter. A selected weld
parameter value can be adjusted at any time even while welding. Pushing the knob in
displays actual arc voltage.
Self Diagnosis Using
Error Codes
An error code is displayed on the Digital Meter when a problem occurs with Primary supply voltage or internal component problems. Refer to troubleshooting guide.
Save/Load function
A total number of 5 programs can be saved into the 185/200ACDC memory. SAVE the
Current Weld Parameters into Memory ?Press the SAVE button. Select a memory location
by rotating the control knob, 1 to 5 is displayed on the meter. After selecting the desired
memory location (ie 1 to 5), press the right scroll button and the machine will give a beep
to confirm the weld parameters from the control panel are saved. LOAD (retrieve) a
Program to Control Panel ?Press the LOAD button. Select a memory location by rotating
the control knob, 1 to 5 is displayed on the meter. After selecting the desired memory
location (ie 1 to 5), press the right scroll button and the machine will give a beep to
confirm the weld parameters are loaded.
Table 4-6: Power Source Features
4-6
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 5:
SET-UP FOR SMAW (STICK) AND GTAW (TIG)
Conventional operating procedures apply when using the
Welding Power Source, i.e. connect work lead directly to
work piece and electrode lead is used to hold electrode.
Wide safety margins provided by the coil design ensure
that the Welding Power Source will withstand short-term
overload without adverse effects. The welding current
range values should be used as a guide only. Current delivered to the arc is dependent on the welding arc voltage, and as welding arc voltage varies between different
classes of electrodes, welding current at any one setting
would vary according to the type of electrode in use. The
operator should use the welding current range values as
a guide, then finally adjust the current setting to suit the
application.
!
WARNING
Before connecting the work clamp to the work
and inserting the electrode in the electrode
holder make sure the Primary power supply
is switched off.
CAUTION
Remove any packaging material prior to use.
Do not block the air vents at the front or rear
or sides of the Welding Power Source.
Figure 5-1: 185/200 ACDC Set-up
CAUTION
DO NOT change the Weld Mode or Weld Process Mode until after POST-FLOW time has
finished.
May 22, 2006
5-1
ARCMASTER 185 ACDC 200 ACDC
5-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 6:
SEQUENCE OF OPERATION
10. Contactor function: Pressing this button enables
Contactor functions.
6.01 Stick Welding
NOTE
• Connect work lead to negative terminal.
Scroll Buttons are used to select the parameters
to be set. The LED's show which function is
being adjusted on the weld sequence graph.
Refer to the Symbols Table located in the front
of the manual for Symbol descriptions.
1
• Connect electrode lead to positive terminal.
• Switch machine on.
• Set AC or DC weld current. If AC is selected then set
AC FREQ to 60Hz & WAVE BALANCE to 50%.
9
• Set Contactor.
10
2
5
8
• Connect remote control device if required.
Use the Scroll Buttons to move to the parameter to be set.
The LED will show which function is being adjusted on the
weld sequence graph. Use the control knob to adjust each
parameter.
• Set HOT START.
7
3
4
6
Figure 6-1: 185/200 ACDC Front Panel
1) Pulse function: Pressing this button enables the TIG
current pulse functions.
2. Remote Current function: Pressing this button enables
remote current functions.
3. TIG Mode Functions: Pressing this button scrolls through
the output TIG function modes (Standard, Slope, Slope
w/repeat, Spot).
4. Digital LED display: Welding amperage and parameter
values are displayed in this window. Internal warnings
such as over temperature, low or high input voltage
applied are signaled to the operator by a warning sound
and error message on the screen.
5. Save/Load Buttons: by using the Save & Load buttons
the operator can easily save up to 5 welding parameter
programs.
6. Control knob: allows the operator to adjust the output
amperage within the entire range of the power source
and sets each parameter value.
7. Process Button: This button selects between STICK, HF
TIG and Lift TIG mode.
8. Scroll Buttons: used to select the parameters to be set.
The LED's show which function is being adjusted on the
Sequence Graph.
• Set WELD current.
Commence welding.
6.02 AC or DC HF TIG Welding
• Connect work lead to positive terminal.
• Connect TIG torch to negative terminal.
• Switch machine on.
• Set AC or DC weld current. If AC is selected then set
AC FREQ & WAVE BALANCE .
• Connect remote control device if required.
Use the Scroll Buttons to move to the parameter to be set.
The LED will show which function is being adjusted on the
weld sequence graph. Use the control knob to adjust each
parameter.
• Set PRE-FLOW time.
• Set HOT START current.
• Set POST-FLOW time.
• Set (WELD) PEAK CUR current.
• Set POST-FLOW time.
Slope Mode Parameters if required.
• Set INTIAL CUR current.
• Set UP SLOPE time.
• Set (WELD) PEAK CUR current.
• Set BASE current.
• Set DOWN SLOPE time.
• Set CRATER CUR current.
9. AC/DC Button: Selects between AC or DC welding output.
May 22, 2006
6-1
ARCMASTER 185 ACDC 200 ACDC
sequence close remote switch contacts and allow weld
current to reach final current setting. Once final current
setting is reached opening the Remote Switch again will
turn off the welding arc and post flow begins.
Pulse Mode parameters if required.
• Set PULSE WIDTH % for PEAK CURRENT.
• Set PEAK CURRENT.
• Set PULSE FREQ.
Commence welding.
6.05 Pulse Controls
(Pulse Width)
6.03 Slope Mode Sequence
(Pulse Frequency)
(Peak Current)
Switch
Closed
Initial
Current
Switch
Open
Up
Slope
Weld Current
Switch
Closed
Down
Slope
Final
Current
Postflow
Preflow
(Base)
Background
Current
Switch
Open
Figure 6-3: Pulse Control Sequence
Figure 6-2: Slope Mode Sequence
The Pulse controls are used primarily to control heat input.
Pulse offers a number of advantages as follows:
1. To start Slope sequence Close remote switch contacts.
Once the welding arc is established the Power Source
will maintain initial current setting as long as the
remote switch contacts are closed.
1. Control puddle - size and fluidity (especially out of
position).
a. In the HF TIG mode, after Preflow time, High
Frequency is present at the torch. When the torch
is positioned close to the work the welding current
will transfer to the work and establish the arc at
the initial current setting.
b. In the Lift TIG mode, after Preflow time, Lift Start
current is present at the torch. When the electrode
is touched to the work and lifted off, the welding
arc is established at the initial current setting.
2. Open Remote Switch - current increases to weld
current. Once welding arc has reached weld current
the power source will maintain weld current as long
as the remote switch contacts are open.
3. Close Remote Switch - Welding current decreases to
final current setting. Once final welding current is
reached the power source will maintain final current
setting as long as the remote switch contacts are
closed.
2. Increase penetration
3. Travel speed control
4. Better consistent quality
5. Decreased distortion on lighter or thinner materials.
Pulse-current provides a system in which the welding
current continuously changes between two levels. During
the periods of Peak current, heating and fusion takes
place, and during the background (base) current periods,
cooling and solidification take place. Pulse Width is the
time in one cycle the current remains at the peak current
setting. Pulse Frequency, measured in Hertz, is the number
of cycles per second the current travels between peak
and background current settings. It is as if the foot
rheostat were moved up and down to increase and
decrease the welding current on a regular basis. The faster
you move the foot rheostat up and down, the faster the
frequency.
4. Open Remote Switch - Welding arc stops and post
flow begins.
6.04 Slope Mode with Repeat Sequence
The repeat function is operated during the down slope
cycle of the Slope Sequence and is active through the
down slope period only. During the down slope period by
opening the Remote Switch contacts the current will
increase back to weld current. Within the Down Slope
period the repeat function can operated as many times
as desired. To continue slope cycle and end slope
6-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 7:
ROUTINE MAINTENANCE
The only routine maintenance required for the power
supply is a thorough cleaning and inspection, with the
frequency depending on the usage and the operating
environment.
!
WARNING
Disconnect primary power at the source before
opening the enclosure. Wait at least two
minutes before opening the enclosure to allow
the primary capacitors to discharge.
To clean the unit, open the enclosure (refer to Section
10.02, Opening the Enclosure) and use a vacuum cleaner
to remove any accumulated dirt and dust. The unit should
also be wiped clean, if necessary; with solvents that are
recommended for cleaning electrical apparatus.
CAUTION
Do not blow air into the power supply during
cleaning. Blowing air into the unit can cause
metal particles to interfere with sensitive
electrical components and cause damage to
the unit.
May 22, 2006
7-1
ARCMASTER 185 ACDC 200 ACDC
Warning!
Disconnect input power before maintaining.
Maintain more often
if used under severe
conditions
Each Use
Visual check of torch
Consumable parts
Visual check of
regulator and pressure
Weekly
Visually inspect the torch
body and consumables
Visually inspect the
cables and leads.
Replace as needed
3 Months
Replace all
broken parts
Clean
exterior
of power supply
6 Months
Bring the unit to an authorized
Thermal Arc Service Center
to remove any accumulated dirt
and dust from the interior.
This may need to be done more
frequently under exceptionally
dirty conditions.
Art # A-07331
7-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 8:
BASIC TROUBLESHOOTING
8.01 General Troubleshooting
Troubleshooting and repairing this unit is a process which
should be undertaken only by those familiar with high
voltage, high power electronic equipment.
!
WARNING
There are extremely dangerous voltage and
power levels present inside this unit. Do not
attempt to diagnose or repair unless you have
had training in power electronics
measurement and troubleshooting
techniques.
8.02 Common Welding Operation Faults
The following are some of the more common operating
faults that occur during welding operations:
1. Power:
• Main power not connected
• Main power not turned on
• MAIN CIRCUIT BRAKER set on OFF position
• INPUT SELECTOR (Easy Link) Switch in wrong
position
2. Poor Weld:
• Wrong polarity
• Wrong electrode used
• Electrode not properly prepared
• Incorrect welding amperage setting
• Speed too slow or too fast
• Incorrect switch settings for intended operation
• Poor weld output connection(s)
If the problem is not resolved after checking the above,
the following guide may suggest more specific items to
check given the faulty operating symptom(s) you are
experiencing.
May 22, 2006
8-1
ARCMASTER 185 ACDC 200 ACDC
8.03 TIG Welding Problems
Weld quality is dependent on the selection of the correct consumalbes, maintenance of equipment and proper welding
technique.
Description
Remedy
1
Excessive beard buildup or poor penetration
or poor fusion at edges
of weld.
Welding current is too low
Increase weld current and/or faulty
joint preparation
2
Weld bead too wide
and flat or undercut at
edges of weld or
excessive burn through
Welding current is too high
Decrease weld current
3
Weld bead too small or
insufficient penetration
or ripples in bead are
widely spaced apart
Travel speed too fast
Reduce travel speed
4
Weld bead too wide or
excessive bead build up
or excessive penetration in butt joint
Travel speed too slow
Increase travel speed
5
Uneven leg length in
fillet joint
Wrong placement of filler rod
Re-position filler rod
6
Electrode melts when
arc is struck.
A Electrode is connected to the ‘+’
terminal.
A Connect the electrode to the ‘−’
terminal.
7
Dirty weld pool.
A Electrode contaminated through
contact with work piece or filler rod
material.
A Clean the electrode by grinding off
the contaminates.
B Gas contaminated with air.
B Check gas lines for cuts and loose
fitting or change gas cylinder.
8
8-2
Possible Cause
Electrode melts or
A No gas flowing to welding region.
oxidizes when an arc is
struck.
A Check the gas lines for kinks or
breaks and gas cylinder contents.
B Torch is clogged with dust.
B Clean torch
C Gas hose is cut.
C Replace gas hose.
D Gas passage contains impurities.
D Disconnect gas hose from torch
then raise gas pressure and blow
out impurities.
E Gas regulator turned off.
E Turn on.
F Torch valve is turned off.
F Turn on.
G The electrode is too small for the
welding current.
G Increase electrode diameter or
reduce the welding current.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
9
Description
Possible Cause
Poor weld finish
Inadequate shielding gas.
10 Arc flutters during TIG
welding
11 Welding arc can not be
established
12 Arc start is not smooth
Remedy
Increase gas flow or check gas line
for gas flow problems.
A Tungsten electrode is too large for
the welding current.
A Select the right size electrode. Refer
to Basic TIG Welding guide.
B Absence of oxides in the weld pool.
B Refer Basic TIG Welding Guide for
ways to reduce arc flutter.
A Work clamp is not connected to the
work piece or the work/torch leads
are not connected to the right
welding terminals.
A Connect the work clamp to the work
piece or connect the work/torch
leads to the right welding terminals.
B Torch lead is disconnected.
B Connect it to the ‘−‘ terminal.
C Gas flow incorrectly set, cylinder
empty or the torch valve is off.
C Select the right flow rate, change
cylinders or turn torch valve on.
A Tungsten electrode is too large for
the welding current.
A Select the right size electrode. Refer
to Basic TIG Welding Guide.
B The wrong electrode is being used
for the welding job
B Select the right electrode type.
Refer to Basic TIG Welding Guide
C Gas flow rate is too high.
C Select the correct rate for the
welding job.
Refer to Basic TIG Welding Guide.
D Incorrect shielding gas is being
used.
D Select the right shielding gas. Refer
to Basic TIG Welding Guide.
E Poor work clamp connection to
work piece.
E Improve connection to work piece.
Table 8-1: TIG Welding Problems
May 22, 2006
8-3
ARCMASTER 185 ACDC 200 ACDC
8.04 Stick Welding Problems
Description
Possible Cause
Remedy
A Electrodes are damp
B Welding current is too high
C Surface impurities such as oil,
grease, paint, etc.
2 Crack occurring in weld A Rigidity of joint.
metal soon after
solidification
commences
B Insufficient throat thickness
1 Gas pockets or voids in
weld metal (Porosity)
C Cooling rate is too high
A Welding current is too low
B Electrode too large for joint
3 A gap is left by failure
of the weld metal to fill
the root of the weld
C Insufficient gap
D Incorrect sequence
A Dry electrodes before use
B Reduce welding current
C Clean joint before welding
A Redesign to relieve weld joint of
severe stresses or use crack
resistance electrodes
B Travel slightly slower to allow greater
build up in throat
C Preheat plate and cool slowly
A Increase welding current
B Use smaller diameter
electrode
C Allow wider gap
D Use correct build-up sequence
Art # A-04991
Incorrect sequence
Insufficient
gap
Figure 8-1 - Example of insufficient gap or incorrect sequence
4 Portions of the weld run A Small electrodes used on heavy cold A Use larger electrodes and pre-heat
plate
the plate
do not fuse to the
surface of the metal or B Welding current is too low
B Increase welding current
edge of the joint
C Wrong electrode angle
C Adjust angle so the welding arc is
directed more into the base metal
D Travel speed of electrode is too high D Reduce travel speed of electrode
E Scale or dirt on joint surface
E Clean surface before welding
Lack of fusion caused by dirt,
electrode angle incorrect,
rate of travel too high
Art # A-04992
Lack of inter-run
fusion
Lack of side fusion, scale
dirt, small electrode,
amperage too low
Lack of root fusion
Figure 8-2 - Example of Lack of Fusion
8-4
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
5 Non-metallic particles
are trapped in the weld
metal (slag inclusion)
A Non-metallic particles may be
trapped in undercut from previous
run
B Joint preparation too restricted
C Irregular deposits allow slag to be
trapped
D Lack of penetration with slag
trapped beneath weld bead
E Rust or mill scale is preventing full
fusion
F Wrong electrode for position in
which welding is done
A If bad undercut is present, clean slag
out and cover with a run from a
smaller diameter electrode.
B Allow for adequate penetration and
room for cleaning out the slag
C If very bad, chip or grind out
irregularities
D Use smaller electrode with sufficient
current to give adequate penetration.
Use suitable tools to remove all slag
from corners
E Clean joint before welding
F
Use electrodes designed for position
in which welding is done, otherwise
proper control of slag is difficult
Table 8-2: Stick Welding Problems
Art # A-04993
Not cleaned, or
incorrect
electrode
Slag trapped in
undercut
Slag trapped in root
Figure 8-3 - Eamples of Slag
May 22, 2006
8-5
ARCMASTER 185 ACDC 200 ACDC
8.05 Power Source Problems
Description
1 The welding arc cannot
be established
Possible Cause
Remedy
A The Primary supply voltage has not A Switch ON the Primary supply
been switched ON.
voltage.
B The Welding Power Source switch is B Switch ON the Welding Power
switched OFF.
Source.
C Loose connections internally.
C Have an Accredited Thermal Arc
Service Agent repair the connection.
2 Maximum output
welding current can not
be achieved with
nominal Mains supply
voltage.
Defective control circuit
Have an Accredited Thermal Arc
Service Agent inspect then repair the
welder.
3 Welding current
reduces when welding
Poor work lead connection to the
work piece.
Ensure that the work lead has a
positive electrical connection to the
work piece.
4 No gas flow when the
torch trigger switch is
depressed.
A Gas hose is cut.
B Gas passage contains impurities.
C Gas regulator turned off.
D Torch trigger switch lead is
disconnected or switch/cable is
faulty.
5 Gas flow won’t shut off A Weld Mode (STD, SLOPE, REPEAT
or SPOT) was changed before
POST-FLOW gas time had finished.
6
A Replace gas hose.
B Disconnect gas hose from the rear of
Power Source then raise gas
pressure and blow out impurities.
C Turn gas regulator on.
D Reconnect lead or repair faulty
switch/cable.
A Strike an arc to complete the weld
cycle.
OR
Switch machine off then on to reset
solenoid valve sequence.
B Gas valve is faulty.
B Have an Accredited Thermal Arc
Service Agent replace gas valve.
C Gas valve jammed open.
C Have an Accredited Thermal Arc
Service Agent repair or replace gas
valve.
D POST-FLOW control is set to 60 sec. D Reduce POST-FLOW time.
The TIG electrode has
Do not change Weld Process Mode
The Weld Process Mode (STICK, HF
been contaminated due
before the POST-FLOW gas time had
TIG or LIFT TIG) was changed
finished.
to the gas flow shutting
before POST-FLOW gas time had
finished.
off before the programmed POST-FLOW
time has elapsed
Table 8-3: Power Source pROBLEMS
8-6
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
8.06 Error Codes
Description
1
E01 error code
displayed
Temperature sensor
TH1 (protects IGBTs)
is greater than 80°C
for about 1 second.
Possible Cause
A
B
C
The Welding Power
Source's duty cycle
has been exceeded.
Fan ceases to operate.
Air flow is restricted by
vents being blocked.
Remedy
A
B
C
2
3
4
5
6
7
E02 error code
displayed
Temperature sensor
TH2 (protects
secondary diodes) is
greater than 80°C for
about 1 second.
E03 error code
displayed
Primary (input) current
too high.
E04 error code
displayed
Output voltage
exceeds the
secondary voltage
specification.
E11 error code
displayed
Over Primary supply
(input) voltage at
primary capacitors is
exceeded for one
second.
E14 error code
displayed
Under mains supply
(input) voltage warning
primary capacitor is
reduced for one
second.
E12 error code
displayed
Under mains supply
(input) voltage primary
capacitors is reduced
for one second
May 22, 2006
A
B
C
The Welding Power
Source's duty cycle
has been exceeded.
Fan ceases to operate.
Air flow is restricted by
vents being blocked.
A
B
C
A
B
Primary current is too
high because welding
arc is too long.
Mains supply voltage is
more than 10% below
nominal voltage.
A
B
Remarks
Let Power Source cool
down then keep within
its duty cycle.
Have an Accredited
Thermal Arc Service
Agent investigate.
Unblock vents then let
Power Source cool
down.
Weld current ceases.
Buzzer sounds constantly.
Let Power Source cool
down then keep within
its duty cycle.
Have an Accredited
Thermal Arc Service
Agent investigate.
Unblock vents then let
Power Source cool
down.
Reduce length of
welding arc.
Weld current ceases.
Buzzer sounds constantly.
Fan operates at max
speed.
E02 resets when TH2
decreases to 70°C for
about 30 seconds.
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check for
low Mains voltage.
Fan operates at max
speed.
E01 resets when TH1
decreases to 70°C for
about 30 seconds.
Weld current ceases.
Buzzer sounds constantly.
Switch machine off then on
to reset E03 error.
TIG torch cable and/or
work lead are too long
or leads are coiled.
Reduce the length of
the TIG torch cable
and/or work lead or uncoiled leads.
Weld current ceases.
Buzzer sounds constantly.
Switch machine off then on
to reset E04 error.
Primary supply voltage
is greater than the
nominal voltage plus
10%.
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check the
Primary voltage.
Weld current ceases.
Buzzer sounds constantly.
Error code E11
automatically will reset
when the voltage reduces.
Mains supply voltage is
less than the nominal
operating voltage less
10%.
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check the
Mains voltage.
Weld current available.
Buzzer sounds
intermittently.
Error code E14
automatically will reset
when the voltage
increases.
A
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check the
Mains voltage.
Weld current ceases.
Buzzer sounds constantly.
Error code E12
automatically will reset
when the voltage
increases.
B
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check the
primary cable and
fuses.
Mains supply voltage is
down to a dangerously
low level.
8-7
ARCMASTER 185 ACDC 200 ACDC
Description
Possible Cause
Remedy
Remarks
8
E81 error code
displayed
Wrong Primary
supply (input)
voltage
connected.
E82 error code
displayed
Rated voltage
selection circuit
abnormality.
E83 error code
displayed
CPU checks
mains supply
(input) voltage
when the on/off
switch on rear
panel of machine
is turned ON.
E85 error code
displayed
Pre-charge
abnormality
When 3 phase machine is
first turned on with the
wrong Primary supply
(input) voltage connected.
Have an Accredited
Thermal Arc Service Agent
or a qualified electrician
check the Mains voltage.
No weld current is
available.
Buzzer sounds constantly.
Switch machine off.
The Primary supply (input)
voltage fluctuates and is
not stable.
Have an Accredited
Thermal Arc Service Agent
or a qualified electrician
check the Mains voltage.
The Primary supply (input)
voltage fluctuates and is
not stable.
Have an Accredited
Thermal Arc Service Agent
check connector plug on
input PCB and the Mains
voltage.
No weld current is
available.
Buzzer sounds constantly.
Switch machine off then on
to reset E82 error.
No weld current is
available.
Buzzer sounds constantly.
Switch machine off then on
to reset E83 error.
Due to malfunction inside
the Welding Power Source,
primary capacitors are not
charging correctly.
Have an Accredited
Thermal Arc Service Agent
service the machine.
E93 error code
displayed
Memory chip
(EEPROM) on
control PCB can
not read/write
weld parameters.
E94 error code
displayed
Temperature
sensor TH1 for
IGBTs or sensor
TH2 for
secondary diodes
are open circuit.
E99 error code
displayed
Mains supply
(input) voltage
has been turned
off but control
circuit has power
from the primary
capacitors.
Memory chip (EEPROM)
error.
Have an Accredited
Thermal Arc Service Agent
check the control PCB.
The Welding Power
Source's temperature
sensors have
malfunctioned.
Have an Accredited
Thermal Arc Service Agent
check or replace the
temperature sensors.
Weld current ceases.
Buzzer sounds constantly.
Switch machine off.
A
A
B
Weld current ceases.
Buzzer sounds constantly.
Must switch machine off
then on to reset E99 error.
9
10
11
12
13
14
B
Main on/off switch on
machine has been
turned off
Mains supply (input)
voltage has been
turned off.
Turn on/off switch on.
Have an Accredited
Thermal Arc Service
Agent or a qualified
electrician check the
Mains voltage and
fuses.
No weld current is
available.
Buzzer sounds constantly.
Switch machine off then on
to reset E85 error.
Weld current ceases.
Buzzer sounds constantly.
Switch machine off.
Table 8-4: Power Source Error Codes
8-8
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 9:
VOLTAGE REDUCTION DEVICE (VRD)
9.01 VRD Specification:
Description
VRD Open Circuit Voltage
Notes
15.3 to 19.8V
Open circuit voltage between welding terminals
VRD Resistance
148 to 193 ohms
The required resistance between welding terminals
to turn ON the welding power
VRD Turn OFF Time
0.2 to 0.3 seconds
The time taken to turn OFF the welding power once
the welding current has stopped
9.02 VRD Maintenance
Routine inspection and testing (power source):
An inspection of the power source, an insulation resistance
test and an earth resistance test shall be carried out.
In addition to the above tests and specifically in relation
to the VRD fitted to this machine, the following periodic
tests should also be conducted by an accredited Thermal
Arc service agent.
A) For transportable equipment, at least once every 3
months; and
B) For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record
of the periodic tests.
NOTE
A transportable power source is any
equipment that is not permanently connected
and fixed in the position in which it is operated.
Description
VRD Open
Circuit Voltage
VRD Turn ON
Resistance
VRD Turn OFF
Time
IEC 60974-1 Requirements
Less than 20V; at Vin=460V
Less than 200 ohms
Less than 0.3 seconds
Periodic Tests
If this equipment is used in a hazardous location or
environments with a high risk of electrocution then the
above tests should be carried out prior to entering this
location.
May 22, 2006
9-1
ARCMASTER 185 ACDC 200 ACDC
9.03 Switching VRD On/Off
Switch the machine Off.
A) Remove the clear plastic cover from the control panel (see Figure 9-1).
• Lift up the cover so it rests on the top of the unit
• Place a small flat bladed screw driver between the cover hinge on the front panel
• Gently lift the cover hinge out of the front cover mounting hole
• Remove the control's clear plastic cover
2
2
3
1
Art # A-07079
Figure 9-1: VRD ON/OFF Step A
B) Remove the four mounting screws from the the control panel (see Figure 9-2).
Art # A-07080
1
1
2
1
1
Figure 9-2: VRD ON/OFF Step B
9-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
C) Access the VRD control by gently prying back the front panel controls to reveal the VRD on/off potentiometer (see
Figure 9-3).
!
CAUTION
DO NOT pull back the front panel with excessive force as this will unplug control PCB. Plugging the control
PCB back into the front panel controls can only be achieved by removing the side covers.
VR1
Art # A-07081
Figure 9-3: VRD ON/OFF Step C and D
D) Turning the VRD ON/OFF (see Figure 9-3)
• To turn VRD ON: rotate the trim potentiometer on the display PCB fully clockwise. When VRD is turned ON check
that it operates as per VRD Specifications on page 9-1.
• To turn VRD OFF: rotate the trim potentiometer on the display PCB fully counter clockwise.
!
WARNING
The VRD ON/OFF trim potentiometer MUST ONLY be positioned fully clockwise OR fully counter clockwise
as the VRD function will be unknown for every other position.
May 22, 2006
9-3
ARCMASTER 185 ACDC 200 ACDC
9-4
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
SECTION 10:
ADVANCED TROUBLESHOOTING
If you are here, all of the troubleshooting suggestions in
Section 8-Basic Troubleshooting have either failed to
resolve the faulty operation or have indicated that one or
more of the subsystems within the power supply are
defective. This section provides the information needed
to take live measurements on the various subsystems
within the power supply, and replace those subsystems
that prove faulty.
CAUTION
10.01 System-Level Fault Isolation
If none of the suggestions provided in Section 8 have
solved the problem or corrected the faulty operation, the
next step is to isolate one or more of the internal
subassemblies that may be defective.
CAUTION
Perform all steps in each procedure, in
sequence. Skipping portions of procedures,
or performing steps out of sequence can result
in damage to the unit, and possible injury, or
worse, to the operator.
Troubleshooting and repairing this unit is a
process, which should be undertaken only by
those familiar with high voltage/high power
electronic equipment.
!
WARNING
There are extremely dangerous voltage and
power levels present inside this unit. Do not
attempt to diagnose or repair unless you have
training in power electronics, measurement
and troubleshooting techniques.
Under no circumstances are field repairs to be attempted
on printed circuit boards or other subassemblies of this
unit. Evidence of unauthorized repairs will void the factory
warranty. If a subassembly is found to be defective by
executing any of the procedures in this Service Manual,
the subassembly should be replaced with a new one. The
faulty subassembly should then be returned to Thermal
Arc through established procedures.
!
WARNING
Disconnect primary power at the source before
disassembling the power supply. Frequently
review the “Principal Safety Standards” in
section 1.02. Be sure the operator is equipped
with proper gloves, clothing and eye and ear
protection. Make sure no part of the operator’s
body comes into contact with the work piece
or any internal components while the unit is
activated.
May 22, 2006
10-1
ARCMASTER 185 ACDC 200 ACDC
3. Loosen the screws on the front panel and the rear
panel by turning them approximately two turns CCW.
10.02 Opening the Enclosure
1. Confirm that the switch on the power supply and the
switch on switchboard (distribution panel) are all OFF.
Art # A-05662
Art # A-05660
Figure 10-3: Screws On Front and Rear Panel
Figure 10-1: Switches
NOTE
DO NOT remove the screws completely.
CAUTION
The capacitors inside the power supply will
slowly discharged after you turn off the switch
of the power supply or the switch at the breaker
box (distribution panel). Wait at least 5
minutes for the discharge to complete.
4. Pull the front panel slightly forward and pull the rear
panel slightly backward. The interlocking hooks of the
side case covers can now be disengaged from the
front and rear panels.
2. Remove all screws and nuts on the side covers.
Art # A-05661
Art # A-05663
Figure 10-2: Screws and Nuts
Figure 10-4: Remove Front Panel
10-2
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
5. Remove the side covers.
Art # A-05664
Figure 10-5: Remove Side Covers
6. Remove protection cover sheet by removing the plastic
tabs.
Art # A-05665
1
2
1
1
1
Figure 10-6: Protection Cover
NOTE
When you re-assemble the parts, conduct the
above process backwards.
May 22, 2006
10-3
ARCMASTER 185 ACDC 200 ACDC
10.03 Verification and Remedy to the
Indicated Error Codes
•
NOTE
Verify and maintain clean, dust free, front and
rear airflow paths. Cleaning and removing dust
from the front and rear panels once every six
months in a normal working environment is
recommended. Extremely dusty environments
will require more frequent cleanings.
The capacitors inside the power supply will
slowly discharged after you turn off the switch
of the power supply or the switch at the breaker
box (distribution panel). Wait at least 5
minutes for the discharge to complete and
then remove the cases to continue your
inspection and repair (or maintenance) inside
the power supply. As for the removal and
installation of the case, refer to section 10.02.
•
Verify the condition of FAN1. Verify that there
are no broken or cracked fan blades and that
FAN1 is not producing any abnormal sounds.
•
If broken or cracked FAN1 blades, or abnormal
sounds are emanating from FAN1, replace
FAN1.
NOTE
•
Verify the operation of the cooling fan and
replace it if the condition of FAN1 is inactive.
Follow the instruction in section.
•
Refer to section 11.3.24 for the replacement
of FAN1.
During the “Verification/Remedy” procedures
below, follow the alphabetical sequence (a, b,
c…) and proceed with your verification and
confirmation.
c) Verify the operation of the cooling fan, FAN1,
and replace it if necessary.
NOTE
After you confirm and replace all spare parts
and components, confirm that there are no
damaged harnesses or connectors, uninstalled
or loose screws.
d) Replace PCB6 (WK-5549).
•
Refer to section 11.3.6 for the
replacement of PCB6.
2. E02 "Over-Temperature at the secondary side"
1. E01 "Over-Temperature at the primary side"
Cause
Occurs when an over-temperature condition
of the secondary IGBT and diode are detected.
Cause
Occurs when an over-temperature condition
of the primary IGBT is detected.
Verification/Remedy
a) Unit may be in thermal shutdown mode.
•
Review the rated duty cycle of the unit per
section 3.8. Exceeding the duty cycle can
damage the unit and void the warranty. Refer
also to section 1.6 for additional information.
b) Verify the ventilating condition.
•
10-4
Maintain a clear and unobstructed distance of
more than 12" in the front and more that 20"
in the rear of the unit for ventilation purposes.
Verification/Remedy
a) Unit may be in thermal shutdown mode.
•
Review the rated duty cycle of the unit per
section 2.06. Exceeding the duty cycle can
damage the unit and void the warranty. Refer
also to section 2.07 for additional information.
b) Verify the ventilating condition.
•
Maintain a clear and unobstructed distance of
more than 12" in the front and more that 20"
in the rear of the unit for ventilation purposes.
•
Verify and maintain clean, dust free, front and
rear airflow paths. Cleaning and removing dust
from the front and rear panels once every six
months in a normal working environment is
recommended. Extremely dusty environments
will require more frequent cleanings.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
c) Verify the operation of the cooling fan, FAN1,
and replace it if necessary.
•
Verify the condition of FAN1. Verify that there
are no broken or cracked fan blades and that
FAN1 is not producing any abnormal sounds.
•
If broken or cracked FAN1 blades or abnormal
sounds are emanating from FAN1, replace
FAN1.
•
Verify the operation of the cooling fan and
replace it if the condition of FAN1 is inactive.
Follow the instruction in section.
•
Refer to section 11.3.24 for the replacement
of FAN1.
d) Replace PCB6 (WK-5549).
•
Refer to section 11.3.6 for the replacement of
PCB6.
NOTE
Pay special attention to installed direction of
HCT1. The Hall CT will not function properly if
installed in the incorrect direction.
Refer to section 11.3.30 for the replacement of HCT1.
4. E04 "Torch Cable Failure"
Cause
The combined length of the torch cable and
the work cable is too long.
Verification/Remedy
a) Verify the rated duty cycles of the torch/work
cable and the power supply.
•
Only use appropriate sized torch cables (length
and capacity). The recommended total
combined length of the torch and work cable
is 50 feet.
•
Torch and work cable should not be "coiled"
during welding operations.
•
Maintain the duty cycle of the power supply.
Refer to 2.09 for the recommended duty cycle.
b
Replace PCB6 (WK-5549) and PCB13 (WK5569).
•
Refer to section 11.3.6 for the replacement of
PCB6.
•
Refer to section 11.3.13 for the replacement
of PCB13.
3. E03 "Primary Over-Current Failure"
Cause
Occurs when excessive current is detected
flowing into the primary side of the main
transformer.
Verification/Remedy
a) Confirm the operation of the machine within
the rated specification.
•
Refer to the specification data sheet in Section
3.8.
b) Verify the secondary diode (D2, D4 and D5).
•
Refer to section 10.07.4 for the test.
•
Refer to section 11.3.32 for the replacement.
5. E11 "Main Supply Over Voltage"
Cause
Main supply voltage occurs at about 275V or
more.
c) Verify the H.F. unit (HF. UNIT1).
•
Refer to section 11.3.29 for the replacement
of HF.UNIT 1.
d) Verify the secondary IGBT (Q13).
•
Refer to section 10.07.5 for the test.
•
Refer to section 11.3.33 for the replacement.
e) Replace the Hall CT, HCT1.
Verification/Remedy
a) Verify main supply voltage.
•
b) Replace PCB4 (WK-4819).
•
May 22, 2006
Perform what is described in a section of
"Verification of the Power Supply Voltage".
Refer to section 11.5.2.
Verify PCB4 (WK-4819) and replace it if
necessary. Refer to section 11.3.5.
10-5
ARCMASTER 185 ACDC 200 ACDC
6. E12 "Main Supply Under Voltage"
Cause
Cause
Main supply voltage occurs in about 150V or less.
Verification/Remedy
a) Verify main supply voltage.
•
8. E82 "Rated Voltage Selection Circuit abnormality"
Perform what is described in the section
"Verification of the Power Supply Voltage".
Refer to section 10.07.
Rated voltage selection circuit inside the Welding
Power Source is not functioning properly.
Verification/Remedy
a) Verify the wiring harness and connection of
CN4 on PCB4 (WK-4819).
•
Re-install the harness with a secure
connection.
•
Contact the manufacturer if you find any
broken connectors or a damaged wiring
harness.
b) Replace PCB4 (WK-4819).
•
Replace PCB4, when abnormalities occur, even
if carries out the above-mentioned
verifications. Refer to section 11.3.5.
7. E81 "Abnormal Input Voltage"
Cause
The detection circuitry of the main supply voltage
is abnormal.
Verification/Remedy
a) Verify main supply voltage.
•
Perform what is described in the section
"Verification of the Power Supply Voltage".
Refer to section 10.07.
b) Confirm a secure connection of the harness
wired between CN2 on PCB3 (WK-5548) and
CN1 on PCB17 (WK-4917).
•
Re-install the harness with a secure
connection.
•
Contact the manufacturer if you find any
broken connectors or a damaged wiring
harness.
c) Verify PCB4 (WK-4819) and replace it if
necessary.
•
•
Check whether there are any abnormalities on
the appearance of PCB4.
b) Verify PCB4 (WK-4819) and replace it if
necessary.
•
Check whether there are any abnormalities on
the appearance of PCB4.
•
Replace PCB4. Refer to section 11.3.5.
9. E83 "Abnormalities in Mains Supply Voltage
Detection"
Cause
Abnormalities, such as an input voltage detection
circuit
Verification/Remedy
a) Verify main supply voltage.
•
Perform what is described in the section
"Verification of the Power Supply Voltage".
Refer to section 10.07.
b) Confirm a secure connection of the harness
wired between CN2 on PCB3 (WK-5548) and
CN1 on PCB17 (WK-4917).
•
Re-install the harness with a secure
connection.
•
Contact the manufacturer if you find any
broken connectors or damaged wiring
harness.
•
When the PCB fixed screw is loosening, it
fastens certainly.
Replace PCB4. Refer to section 11.3.5.
c) Verify PCB4 (WK-4819) and replace it if
necessary.
10-6
•
Check whether there are any abnormalities on
the appearance of PCB4.
•
Replace PCB4. Refer to section 11.3.5.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
10. E85 "Pre-charge abnormality"
Cause
•
Due to malfunction inside the Welding Power
Source, primary capacitors are not charging
correctly.
Verification/Remedy
a) Verify the connection of PCB2 (WK-5596 for
185 ACDC, WK5482 for 200 ACDC) and the
rectified output voltage of the rectifier.
•
Verify the connection between CN2 on PCB2
and CN3 on PCB3.
•
Confirm whether there is any breakage (blown,
burnt, cracked, etc.) of R4 and R5, which
connect to TB5 and TB6 of PCB2.
•
b) Replace thermistors (TH1, TH2).
Perform what is described in the section
"Verification of the Power Supply Voltage".
Refer to section 10.07.
b) Verify the primary diode (D1).
•
Verify D1. Refer to section 10.5.2.
•
Replace D1. Refer to section 11.3.31.
Refer to section 11.3.22, 11.3.23.
c) Replace PCB6 (WK-5549).
•
Refer to section 11.3.6.
12. E99 "Initial Power Receiving"
Cause
Occurs when the initial AC power received signal
has not reached the CPU. This error occurs
normally during the power "OFF" sequence of the
unit.
Verification/Remedy
a) Confirm a secure connection of the harness
wired between CN1 on PCB17 (WK-4917) and
CN2 on PCB3 (WK-5548).
•
Re-install the harness with a secure
connection.
•
Contact the manufacturer if you find any
broken connectors or a damaged wiring
harness.
c) Verify the primary IGBT (Q1-Q12).
b) Verify PCB4 (WK-4819) and replace it if
necessary.
•
Verify IGBT. Refer to section 10.5.7.
•
•
Replace IGBT. Refer to section 11.3.8, 11.3.9.
Confirm a secure connection of all harnesses
wired to PCB3 and PCB4.
•
Replace PCB4. Refer to section 11.3.5.
d) Replace PCB2 (WK-5596) and PCB4 (WK4819).
•
Replace PCB2 and PCB4, when abnormalities
occur, even if carries out the above-mentioned
verifications. Refer to section 11.3.2, 11.3.4.
c) Replace PCB6 (WK-5549).
•
Refer to section 11.3.6.
11. E94 "Thermistor malfunction"
Cause
Thermistors for detecting temperature of internal
components have malfunctioned.
Verification/Remedy
a) Confirm a secure connection of the harness
wired between CN8-9 on PCB6 (WK-5549) and
Thermistors (TH1, TH2).
•
Re-install the harness with a secure
connection.
•
Contact the manufacturer if you find any
broken connectors or a damaged wiring
harness.
May 22, 2006
10-7
ARCMASTER 185 ACDC 200 ACDC
10.04 Verification and Remedy to Failures
without Indication Codes
2. “Gas Valve Failure” (No Gas flow through unit)
Cause
Occurs when the gas valve (SOL1) is defective,
damaged or the driving voltage is incorrect.
1. “Cooling Fan Failure” (Fan is not rotating.)
Verification/Remedy
Cause
Occurs when the cooling fan (FAN1) is
defective, damaged or the driving voltage is
incorrect.
Verification/Remedy
a) Confirm that TIG welding is selected on the
welding mode.
•
Do not change welding modes while welding.
•
Only change welding modes when the unit is
idle (torch switch OFF).
•
Verify the setting of Pre-flow and Post-flow
on the front panel.
•
If the Pre-flow or Post-flow time is set to 0
seconds, change them to higher setting.
a) Verify the cooling fan, FAN1.
•
Inspect the condition of the fan blades and all
peripheral parts. Clean the fan blades and all
peripheral parts if covered with dust. Cleaning
and removing dust from the fan blades once
every 6 months in a normal environment is
recommended. Extremely dusty environments
will require more frequent cleanings.
•
Verify that there are no wiring harnesses
entangled inside the fan, confirm that the
harnesses do not have any brakes in the wire
or damaged connectors.
•
Replace wiring harnesses if you find any
broken connectors or damaged wiring
harnesses.
•
Replace the fan if there are any broken, cracked
or missing fan blades.
•
Refer to section 11.3.24.
b) Verify the wiring harness between the cooling
fan (FAN1) and CN11 on PCB3 (WK-5548).
•
Confirm a secure connection of the harness
to CN11 on PCB3.
c) Verify the drive circuitry of the cooling fan
(FAN1) on PCB3.
•
10-8
Verify the drive circuitry of the cooling fan
(FAN1) on PCB3.
•
Refer to section 10.07.1.
•
Replace PCB3 if necessary.
•
Refer to section 11.3.4
b) Verify the layout of the gas hose.
•
Confirm that the hose is securely connected
into the fitting at the inlet and the outlet.
Confirm that the layout of the gas hose so that
it is not bent or kinked. Confirm there are no
breaks, burns or holes in the hose.
•
Confirm the layout of the TIG torch gas hose
and that the hose adapters are properly
connected.
c) Verify the wiring harness and connection of
gas valve (SOL1) and CN11 on PCB3 (WK5548).
d) Verify the drive circuitry of the gas valve
(SOL1).
•
Verify the drive circuitry of the gas valve
(SOL1).
•
Refer to section 10.07.2.
•
Replace PCB3, when abnormal.
•
Refer to section 11.3.4.
e) Replace the PCB6 (WK-5549).
•
Refer to section 11.3.6.
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
3. “No weld output”
NOTE
When in High Frequency TIG (HF TIG) mode,
if the High Frequency is not generated
(present), refer to “High Frequency Output
Failure” on Page 10-10 before performing
t h i s section.
Cause
Occurs when the remote connector (CON1)
or associated circuitry is defective, damaged,
or the TIG torch cable is defective.
Verification/Remedy
c) Verify the no-load voltage (OCV). (Applies to
STICK, High Frequency TIG (HF TIG) mode.)
•
Refer to the section "Verification of No-load
voltage (OCV)" on page 10-17.
•
If performing the "No-Load Voltage Failure"
procedure does not rectify the failure, perform
the following tests in the sequence below.
Replace any defective components found.
1. Secondary IGBT (Q13)
•
Verification. Refer to section 10.07.6
•
Replacement. Refer to section 11.3.33.
2. Secondary diode (D2, D4, D5)
CAUTION
Read and understand this entire section before
proceeding. Extreme personal harm and test
equipment damage will occur if the procedures
are not performed accurately.
•
Verification. Refer to section 10.07.4
•
Replacement. Refer to section 11.3.32.
3. Coupling coil (CC1)
•
4. Reactor (FCH1)
a) Verify the remote connector (CON1). (Applies
to LIFT TIG and High Frequency TIG (HF TIG)
mode.)
•
•
Confirm a secure between the remote
connector (CON1) and the TIG torch cable.
•
•
Confirm a secure connection of the harness
and the connections between the remote
connector (CON1) and PCB7 (WK-5550) are
all correct and there are no open circuits.
•
Contact the manufacture if you find any broken
connectors or damaged wiring harnesses.
•
Confirm the proper pins-outs of the remote
connector at the TIG Torch side. (Refer to
page 4-1.)
•
Confirm that there is no open circuit on the
remote connector at TIG Torch side.
•
In equipment for remote control use, confirm
the pin specification of the connector. (Refer to
page 4-1.)
Replacement. Refer to section 11.3.20.
Replacement. Refer to section 11.3.21.
5. Transformer (T1)
Replacement. Refer to section 11.3.12.
6. Primary IGBT (Q1-Q12)
•
Verification. Refer to section 10.07.5
•
Replacement. Refer to section 11.3.8,
11.3.9.
7. Hall C.T. (HCT1)
•
Replacement. Refer to section 11.3.30.
b) Verify the condition and connections of the
welding cable, the stick rod holders and the
ground clamp. (Applies to all welding modes.)
•
Confirm a secure connection of the welding
cable, stick rod holders, ground clamp and
dinse connectors and there are no open
circuits.
May 22, 2006
10-9
ARCMASTER 185 ACDC 200 ACDC
4. “Operating Panel Failure” (LED’s do not light
properly or weld settings cannot be established.)
Cause
5. “High Frequency Output Failure” (Unit does not
generate High Frequency.)
Cause
Occurs when there is a connection failure
among PCB6 (WK-5549), PCB10 (WK-5527)
and PCB6 or PCB10 are defective.
Occurs when the H.F. unit is defective or blown.
Verification/Remedy
Verification/Remedy
a) Verify the harness connection between CN21
on PCB6 (WK-5549) and CN2 on PCB10 (WK5527).
•
Confirm a secure connection of the harness
and the connections between CN21 on PCB6
(WK-5549) and CN2 on PCB10 (WK-5527).
•
Contact the manufacture if you find any
broken connectors or a damaged wiring
harnesses.
b) Verify the connection between PCB5 (WK5551) and PCB6 (WK-5549).
c) Replace PCB5 (WK-5551) and PCB6 (WK5549).
•
Refer to section 11.3.4, 11.3.6.
CAUTION
Read and understand this entire section before
proceeding. Extreme personal harm and test
equipment damage will occur if the procedures
are not performed accurately. The unit will
generate a High Voltage component that can
cause extreme personal harm and test
equipment damage. Capacitors installed inside
the Welding Power Source are electrically
charged for a while after the Mains ON/OFF
switch or distribution panel switch has been
turned off. Before inspecting the inside of the
Welding Power Source, leave it for about 5
minutes after switching off power for
discharging the capacitors, and then remove
the top and side panels.
d) Replace PCB6 (WK-5549) and PCB10 (WK5527).
a) Verify the connection between High Frequency
(HF UNIT1) and Coupling Coil (CC1).
•
•
Verify the connection between the HF UNIT1
and CC1; confirm that the quick-disconnect
terminals are inserted onto the terminals of
HF UNIT1 (TB5- TB6) correctly and completely.
•
Confirm there are no short circuits, burnt or
broken wires at CC1.
•
Replace CC1.
•
Refer to section 11.3.20.
Refer to section 11.3.6, 11.3.10.
b) Verify the connection between High Frequency
(HF UNIT1) and the current limiting resistor
(R2).
•
Verify the connection between HF UNIT1 and
the current limiting resistor (R2), confirm that
the quick-disconnect terminals are inserted
onto the terminals of HF UNIT1 (TB3- TB4)
correctly and completely.
•
Confirm there are no short circuits, burnt or
broken wires between the HF UNIT1 and the
current limiting resistor (R2).
c) Verify the connection between the terminals
between AC1-AC2 (TB1-TB2).
10-10
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
•
•
Verify the connection between AC1-AC2,
confirm that the quick-disconnect terminals
are inserted onto the terminals of HF UNIT1
correctly and completely.
Confirm there are no short circuits, burnt or
broken wires between AC1 and AC2.
d) Verify and replace the Gap (GAP) of the High
Frequency Unit (HF UNIT1).
10.05 Fault Isolation Tests
Preparation:
The following initial conditions must be met prior to
starting any of the procedures in this section.
1) Connect the appropriate input voltage. (Check the
name plate on the rear of the power supply for
proper input voltage.)
NOTE
•
Confirm that the GAP is connected to HF UNIT1
correctly and completely.
•
Confirm there is no dust or foreign debris
between the space of the GAP.
Operate at ALL input voltages as noted on the
name plate on the rear panel when testing the
power supply.
•
If there are any abnormalities observed with
the GAP, replace the GAP.
2) Remove the Side Panel. Refer to section
10.02.
•
A setup of a gap is 1.0mm. In the case of a
gap 1.0mm or more, high frequency voltage
and a period increase. In the case of a gap
1.0mm or less, high frequency voltage and a
period decrease.
3) Close primary power source wall, disconnect
switch or circuit breaker.
e) Verify and replace the Current limiting Resistor
(R6) on HF UNIT1.
•
If R6 is defective (blown, burnt, cracked, etc.),
replace R6.
•
Refer to section 11.3.19.
f) Replace the High Frequency Unit (HF UNIT1).
•
Refer to section 11.3.29.
g) Replace PCB3 (WK-5548).
•
4) Place power supply MAIN CIRCUIT SWITCH (S1)
on rear of the unit in the ON position.
!
WARNING
Dangerous voltage and power levels are
present inside this unit. Be sure the operator
is equipped with proper gloves, clothing and
eye and ear protection. Make sure no part of
the operator’s body comes into contact with
the workpiece or any internal components
while the unit is activated.
Refer to section 11.3.4.
May 22, 2006
10-11
ARCMASTER 185 ACDC 200 ACDC
10.06 Verification of the Power Input
Circuitry
3) Verify input voltage after the input switch (S1)
using an AC voltmeter. (The capability of the
voltmeter should be more than 600VAC.)
•
Using an AC voltmeter, measure between the
points U2 and V2 on the input switch, S1.
•
Using an AC voltmeter, measure between the
points U2 and W2 on the input switch, S1.
•
Using an AC voltmeter, measure between the
points V2 and W2 on the input switch, S1.
CAUTION
Before performing any portion of the
procedure below, make certain the unit is
placed in the initial set up condition as
described in section 10.05 "Preparation".
The location of points U2, V2 and W2 on switch
S1 are indicated in Figure 10-7. When using a
single-phase connection, the voltage can be
verified only between U2 and V2.
Verification of the AC Input Voltage using
an AC Voltmeter
1) Verify input voltage (Phase-to Phase) using an
AC voltmeter. (The capability of the voltmeter
should be more than 600VAC). Measure the point
between lines U1 and V1 on the input switch, S1.
Measure the point between lines U1 and W1 on
the input switch, S1. Measure the point between
lines V1 and W1 on the input switch, S1. The
location of points U1, V1 and W1 on switch S1
are indicated in Figure 11-7. When using a singlephase connection, the voltage can be verified only
between U1 and V1.
U2
S1
U1
V2
W2
4) If this voltage is out of the operating range, which
is ± 10% (187~253/414~ 506VAC) of the rated
voltage (208, 230 / 460V), replace S1, following
the process in section 11.03.26.
5) Verify the rectified output voltage of the input
diode, D1 using a DC voltmeter. (The capability of
the voltmeter should be more than 1000VDC.)
Using a DC voltmeter, measure between the points
1 (P) [+] and 2(N)[-] on D1. Points 1 (P) and 2
(N) are on D1. See Figure 10-8. The measured
voltage should be approximately 1.4 times larger
than input voltage measured in #1 above. Replace
diode D1 if the calculated measurement is not
within the corresponding range (260 ~ 360 / 580
~ 720 VDC) following the process in section
11.03.31.
V1
W1
2
1
Figure 10-7: Check Points U1, U2, V1, V2, W1 and W2
2) If the input voltage is out of the operating range
of the unit, which is ± 10% (187 ~ 253 /414 ~
506 VAC) of the rated voltage (208, 230/ 460V),
verify the available power capacity at the installed
site. If the input voltage is within the operating
range, recheck the input voltage while welding,
as welding may cause the input voltage to
decrease to a value below the operating range of
the unit.
10-12
D1
Figure 10-8: Check Points for 1 (P) and 2(N)
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
6) Verify bus voltage (the voltage of the electrolytic
capacitor after rectification) using a DC voltmeter.
(The capability of the voltmeter should be more
than 1000VDC.) Using a DC voltmeter, measure
between the points TB1 (P) [+] and TB2 (N) [-]
on PCB1 (WK-5477). Points TB1 (P) and TB2 (N)
can be found on the parts side of PCB1. See Figure
11-9. The measured voltage should be
approximately 1.4 times larger than input voltage
measured in #1 above. Replace diode D1 if the
calculated measurement is not within the
corresponding range (260 ~ 360 / 580 ~ 720 VDC)
following the process in section 11.3.31.
PCB1
TB1
TB2
10.07 Verification of Power Supply
Voltage
CAUTION
Before performing any portion of the
procedure below, make certain the unit is
placed in the initial set up condition as
described in section 10.05 "Preparation".
1) Verify Power Supply voltage using an DC
voltmeter. (The capability of the voltmeter should
be more than 50VDC.) Operate at all input voltages
as noted on the nameplate on the rear panel when
testing the power supply.
2) On the PCB3 (WK-5548) and PCB6 (WK- 5549),
measure the voltages according to the following
table. The check points and the reference are
obtainable on the top side of PCB6 (WK-5549).
The locations of points are indicated in Figure 1110, 11-11.
Figure 10-9: The check points TB1(P) and TB2(N)
7) After the replacement of D1, if the above voltage
is still abnormal, replace PCB1 (WK-5477).
TP3
TP0
TP1
PCB6
TP2
Figure 10-10: Checkpoints TP0-TP3 on PCB6
Check Point
PCB6
TP1
TP2
TP3
Reference
PCB6
TP0
TP0
TP0
ACCEPTABLE
VALUE
+5VDC
+15VDC
–15VDC
Table 10-1: Checkpoints TP0-TP3 on PCB6
May 22, 2006
10-13
ARCMASTER 185 ACDC 200 ACDC
Pin 3
Pin 1
1pin
2pin
PCB3
PCB3
CN11
CN18
Figure 11-12: Verification of the FAN1
Figure 10-9: Check Points for TP0-3, 6-11, 00
Check Point
PCB3
Pin 1 on CN18
Reference
PCB3
Pin 3 on CN18
ACCEPTABLE
VALUE
+24VDC
Table 10-2: Checkpoints CN18 on PCB3
3) If any of these voltages are not present or are
below a 10% tolerance, replace the PCB3 (WK5548). Refer to section 11.3.4.
1. Verification of the Cooling Fan, FAN1,
Drive Circuitry
FAN1
Status
Voltage
measurement.
(PIN1-PIN2 of
CN11 on
PCB3)
Remedy
FAN1 drive circuit is
normal.
Replace PCB3.
Case
Rotating Below DC 18V
2
Refer to section 11.3.4.
Replace PCB3.
Refer to section 11.3.4.
Case
Rotating
1
DC 18 ~ 25V
Case
3
Inactive Below DC 18V
Case
4
Inactive
Perform “2. Verfication of
Power Supply Voltage”.
Refer to section 10.07.
Replace the FAN1.
DC 18 ~ 25V
Refer to section 11.3.24.
CAUTION
Before performing any portion of the
procedure below, make certain the unit is
placed in the initial set up condition as
described in section 10.05 "Preparation".
1) Verify the condition of the cooling fan, FAN1, using
a DC voltmeter. (The capability of the voltmeter
should be more than 50VDC.) Using a DC
voltmeter, measure between PIN 1 (Positive [+])
and PIN 2 (Negative [-]) of CN11 on PCB3 (WK5548). The location of connector CN11 of PCB3
is indicated in Figure 11-12. When you measure
the above voltage, do not remove the connector.
Conduct the measurement while the connector
plug and receptacle are still connected.
10-14
Table 10-3: Verification of the FAN1
• During low output and standby, the fan
rotation slows down, making exact voltage
measurement impossible.
•
When verifying the voltage, confirm that the AC
input voltage remains within the operating range
of the unit. (The AC input does not drop below
180VAC).
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
2. Verification of the Gas Valve, SOL1, Drive
Circuitry
CAUTION
3. Verification of the primary Diode (D1)
1) Verify the characteristic of the primary diode, D1,
using a diode tester.
2) Refer bellow Table 11-5 and Figure 11-14 for the
checkpoints on D1.
Before performing any portion of the
procedure below, make certain the unit is
placed in the initial set up condition as
described at the beginning of an above section
“1. Preparation”. Refer to section 10.4.1.
COMPONENT
TESTED
Diode of D1
1) Verify the voltage between the PIN 3 (Positive [+])
and PIN 4 (Negative [-]) of connector CN11 on
PCB3 (WK-5548) while you press the torch switch
while in TIG Mode. (The capacity of the voltmeter
should be more than 50VDC.) The location of
connector CN11 of PCB3 (WK- 5548) is indicated
in Figure 10-13. When you measure the above
voltage, do not remove the connector. Conduct
the measurement while the connector plug and
receptacle are still connected.
PCB3
Thyristor of D1
TERMINALS
Positive
Negative
lead
lead
3, 4, 5
0
0
3, 4, 5
3, 4, 5
2
2
3, 4, 5
0
1
1
0
ACCEPTABLE
VALUE
0.3 to 0.5V
Open
Open
0.3 to 0.5V
Open
Open
Table 10-5: Tester checkpoints for D1
3
4
5
Pin 3
Pin 4
2
CN11
1
6
0
7
Figure 10-13: Verification of the SOL1
0
2) Using the measurement taken above, follow the
chart below for possible failure modes.
Voltage
measurement.
(1PIN-2PIN of
CN11 on PCB3)
6
7
1
5
Remedy
4
3
Case
1
Below DC 18V
Replace PCB1. Refer
to section 12.3.1.
Case
2
DC 18 ~ 25V
Replace SOL1. Refer
to section 12.3.25.
2
Table 10-4: Verification of the SOL1
Figure 10-14: Tester checkpoints for D1 showing the
interconnection diagram
3) When verifying the voltage, confirm that the AC
input voltage remain within the operating range
of the unit. (The AC input does not drop below
180VAC).
May 22, 2006
10-15
ARCMASTER 185 ACDC 200 ACDC
4. Verification of the secondary Diode (D2,
D4, D5)
1) Verify the characteristic of the secondary diode,
D2, D4 and D5, using a diode tester.
2) Refer to Table 10-6 and Figure 10-15 for the
checkpoints on D2, D4 and D5.
COMPONENT
TESTED
TERMINALS
Diode 1 of D2,
D4 and D5
Positive
lead
Anode
Cathode
Negative
lead
Cathode
Anode
Diode 2 of D2,
D4 and D5
Anode
Cathode
Cathode
Anode
5. Verification of the primary IGBT (Q1-Q12)
1) Check whether there are any abnormalities in the
appearance of PCB8 and PCB9.
2) Verify the characteristic of the primary IGBT (Q1Q12), using a diode tester.
3) Refer to Table 11-7 and Figure 11-16 for the
checkpoints on PCB8 and PCB9.
ACCEPTABLE
VALUE
0.2 to 0.3V
Open
0.2 to 0.3V
Open
TERMINALS
COMPONENT
TESTED
Positive
lead
C
CE
CE
E
Collector-Emitter
of Q1A'Q12 with
PCB8 and PCB9
Table 10-6: Tester checkpoints for D2, D4 and D5
Negative
lead
CE
C
E
CE
ACCEPTABLE
VALUE
Open
0.2 to 0.5V
Open
0.2 to 0.5V
Table 10-7: Tester checkpoints for Q1-Q12
Anode
Cathode
Anode
C
CE
E
Cathode
PCB8
PCB9
Figure 10-16: Tester checkpoints for Q1-Q12
Figure 10-15: Tester checkpoints for D2, D4 and D5
10-16
May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
6. Verification of the secondary IGBT (Q13)
7.
Verification of No-load Voltage (OCV)
1) Check whether there are any abnormalities on the
appearance of PCB14.
2) Verify the characteristic of the secondary IGBT
(Q13), using a diode tester.
3) Refer to Table 10-8 and Figure 10-17 for the
checkpoints on Q13.
COMPONENT
TESTED
Collector-Emitter
of Q13
(By PCB15
connection)
TERMINALS
ACCEPTABLE
Positive
Negative
VALUE
lead
lead
Open
C1
C2E1
0.2 to 0.5V
C2E1
C1
Open
C2E1
E2
0.2 to 0.5V
E2
C2E1
Table 10-8: Tester checkpoints in the Q13
CAUTION
Before performing any portion of the
procedure below, make certain the unit is
placed in the initial set up condition as
described at the beginning of an above section
"1. Preparation". Refer to section 10.4.1.
1) Verify the no-load voltage in STICK mode.
•
In STICK welding mode, mark and then turn
potentiometer VR1 on PCB6 (WK-5549) fully
counter-clockwise to turn off the electric shock
protector function (Voltage-Reduction- Device,
VRD).
•
Contactor function is put into the state of on
pushing Function button. Refer to section 6.
!
C1
E2
C2E1
Figure 10-17: Tester checkpoints in the Q13
WARNING
Electric shock hazard. The unit will generate
OCV immediately when contactor function is
put into the state of on pushing Function
button at STICK mode.
•
Verify the no-load voltage using a DC
voltmeter. (The capability of the voltmeter
should be more than 100VDC.)
•
The normal no-load voltage is approximately
65V.
2) Verify the no-load voltage (OCV) in High Frequency
TIG mode.
!
WARNING
This welding mode produces high frequency
and high voltage. Extra care shall be taken to
prevent electric shock.
3) When in HF TIG mode, the unit will generate high
voltage. To prevent personal harm and test
equipment damage, mark and then remove the
indicated wire from the HF UNIT1 shown in Figure
10-18. To prevent electric shock, always wrap the
removed wire with electrical tape or other suitable
insulation.
May 22, 2006
10-17
ARCMASTER 185 ACDC 200 ACDC
Figure 10-18: Removal and installation from the HF
UNIT1 (To disable the operation of the HF unit.)
4) Press the Welding mode selection button to select
HF TIG welding mode.
5) While depressing the Torch switch, verify the OCV
using a DC voltmeter. (The capability of the
voltmeter should be more than 100VDC.) The
check point with a tester is the voltage between
output terminal + and -. In TIG mode, the OCV
ceases 3 seconds after you depress the torch
switch.
6) The normal no-load voltage is approximately 5862V.
7) Return the variable resistor (VR1) to the
original position.
• Fully clockwise: VRD ON
•
Fully counter-clockwise: VRD OFF
8) Return connection with HF UNIT1 to the original
position.
10-18
May 22, 2006
SECTION 11 REPAIR PROCEDURES
1 Maintenance List
MAINTENANCE
8
1
2
3
4
5
6
7
No.
DWG No.
1 PCB3
Parts name
Printed Circuit Board (WK-5548)
2
PCB10
Printed Circuit Board (WK-5527)
3
PCB11
Printed Circuit Board (WK-5528)
4
PCB12
Printed Circuit Board (WK-5615)
5
PCB13
Printed Circuit Board (WK-5569)
6
PCB14
Printed Circuit Board (WK-5570)
7
PCB16
Printed Circuit Board (WK-5499)
8
PCB17
Printed Circuit Board (WK-4917)
11 – 1
Reference page
11-10
11-14
11-15
11-16
11-19
11-20
11-20
11-21
Part No.
W7001314
W7001812
W7001320
W7001594
W7001433
W7001434
W7001324
10-6740
ARCMASTER 185ACDC / 200ACDC
3
4
5
2
7
9
8
1
No.
1
DWG No.
PCB1
2
Parts name
Reference page
Part No.
Printed Circuit Board (WK-5477)
11-6
W7001402
Printed Circuit Board 185ACDC (WK-5596)
11-7
W7001408
Printed Circuit Board 200ACDC (WK-5482)
11- 8
W7001407
3
PCB2
4
PCB4
Printed Circuit Board (WK-4819)
11-11
10-6635
5
PCB5
Printed Circuit Board (WK-5551)
11-12
W7001417
6
PCB6
Printed Circuit Board 185ACDC (WK-5549)
11-12
W7001725
6
7
PCB6
PCB7
Printed Circuit Board 200ACDC (WK-5549)
Printed Circuit Board (WK-5550)
11-12
11-12
W7001726
W7001423
8
PCB8 (Q1~Q6)
Printed Circuit Board (WK-5479) (Primary IGBT)
11-13
W7001318
9
PCB9 (Q7~Q12)
Printed Circuit Board (WK-5479) (Primary IGBT)
11-13
W7001318
11 – 2
ARCMASTER 185ACDC / 200ACDC
3
8
2
10
7
5
4
6
1
9
No.
DWG No.
1 CC1
Parts name
Coupling Coil
Reference page
11-25
Part No.
W7001384
2
CT2
Current Trans
11-16
W7001304
3
D1
Primary Diode
11-34
10-6628
4
D2
Secondary Diode
11-34
10-6629
5
D4
Secondary Diode
11-34
10-6629
6
D5
Secondary Diode
11-34
10-6629
7
FCH1
Reactor
11-33
W7001502
8
HCT1
Hall C. T.
11-26
10-5003
9
HF.UNIT
High Frequency Unit
10
T1
Main Trans
11-32
11-16
11 – 3
W7001399
W7001456
ARCMASTER 185ACDC / 200ACDC
9
8
5
6
4
2
11
1
12
10
7
3
No.
DWG No.
1 CON1
Parts name
Remote Connector
Reference page
11-31
Part No.
W7001595
2
FAN1
Cooling Fan
11-28
W7001307
3
Q13 (PCB15)
Secondary IGBT (WK-3367)
11-35
10-6643
4
R3
Discharge Resistor
11-22
10-5137
5
R4
Current Limiting Resistor
11-24
W7001452
6
R5
Current Limiting Resistor
11-24
W7001452
7
R6
Resistor on High Frequency Unit
11-24
W7001451
8
S1
Main ON/OFF Switch
11-29
W7001453
9
S2
Input Voltage Switch
11-30
10-5222
10
SOL1
Solenoid Valve
11-29
10-6645
11
TH1
Primary Thermistor
11-27
10-5228
12
TH2
Secondary Thermistor
11-27
10-5228
11 – 4
ARCMASTER 185ACDC / 200ACDC
2 Service Tools
2.1 Tools and parts
The tools and parts to be used for maintenance are shown by icons.
Spanner
(5.5, 8, 10, 17mm)
Philips Head
Screwdriver
Long Nose
Pliers
C-Ring Pliers
Snap Band
Silicon
Compound
2.2 Notes of disassembly and assembly
NOTE
When removing the locking type connectors and board supporters, disengage the locking mechanism first
and then disconnect them.
Locking type connectors and board supporters are indicated in this manual using the following symbols;
black star marks for locking connectors and white star marks for locking board supports.
NOTE
During your maintenance or repair, please cut any tie-wraps necessary. However, after your maintenance or
repair, please reassemble and tie-wrap all components and wiring in the same manner as before the maintenance or repair.
CAUTION
Please note that you remove each connector, grasp and pull out by the connector part only. Do not pull the
harness (cable) part.
WARNING
The capacitors inside the power supply will slowly discharged after you turn off the switch of the power supply or the switch at the breaker box (distribution panel). Wait at least 5 minutes for the discharge to complete.
11 – 5
ARCMASTER 185ACDC / 200ACDC
3 Replacement Procedure
3.1 PCB1 (WK-5477) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove PCB2 (WK-5596, WK-5482). [Reference page: 11-7]
3) Remove the PCB8 (WK-5479). [Reference page: 11-13]
4) Remove the PCB9 (WK-5479). [Reference page: 11-13]
5) Remove the four screws. Pull out the Rear Control Cover and bring it down.
1
1
2
1
1
6) Remove the five screws and the PCB1 (WK-5477). Remove the two screws and two terminals.
1
1
1
2
3
7) Remove the four screws and remove the four terminals and 200V Input Bus Bar.
1
2
1
2
1
2
2
3
3
11 – 6
ARCMASTER 185ACDC / 200ACDC
3.2 PCB2 (WK-5596) *185ACDC only
1) Remove the Side Panel. [Reference page: 10-2]
2) Disconnect the 13 connectors.
CN17
CN1
CN3
CN7 CN19
CN21
CN2
CN8
CN1
CN9
CN9
CN8
CN11
3) Remove the four screws and two ground terminals.
4) Remove the PCB3, PCB4, PCB5, PCB6, and PCB7 unit and then disconnect the two connectors.
Remove the Insulated Sheet.
1
CN15
2
CN14
2
3
11 – 7
ARCMASTER 185ACDC / 200ACDC
5) Remove the three screws and seven terminals. Remove the PCB2 (WK-5596).
1
2
6) Disconnect the three connectors and two terminal from the PCB2 (WK-5596).
CN2
1
CN3
1
1
CN1
2
TB5
TB6
3.3 PCB2 (WK-5482)  *200ACDC only
1) Remove the Side Panel. [Reference page: 10-2]
2) Disconnect the 13 connectors.
CN17
CN1
CN3
CN7 CN19
CN21
CN8
CN1
CN9
CN8
CN9
CN2
CN11
11 – 8
ARCMASTER 185ACDC / 200ACDC
3) Remove the four screws and two ground terminals.
4) Remove the PCB3, PCB4, PCB5, PCB6, and PCB7 unit and then disconnect the two connectors.
Remove the Insulated Sheet.
1
CN15
2
CN14
2
3
5) Remove seven screws and five terminals. Remove the PCB2 (WK-5482).
1
1
2
11 – 9
ARCMASTER 185ACDC / 200ACDC
6) Disconnect two connectors and two terminals from PCB2 (WK-5482).
1
1
2
3.4 PCB3 (WK-5548), PCB5 (WK-5551) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove PCB4 (WK-4819). [Reference page: 11-11]
3) Remove PCB6 (WK-5549). [Reference page: 11-12]
4) Remove PCB7 (WK-5550). [Reference page: 11-12]
5) Disconnect the 11 connectors.
CN21
CN20
CN9
CN23
CN22
CN11
CN8
CN19
CN1
CN2
CN3
6) Remove the four screws and then the two ground terminals. Remove the PCB3 and PCB5 unit.
Disconnect the two connectors.
1
CN14
CN15
11 – 10
2
ARCMASTER 185ACDC / 200ACDC
7) Disconnect the one connector and remove the two screws, and then remove the PCB5 (WK-5551) from
the PCB3 (WK-5548).
Remove the one screw and one ground terminal from the PCB5 (WK-5551).
CN20
1
2
8) Disconnect the two connectors from the PCB3 (WK-5548).
CN18
CN33
3.5 PCB4 (WK-4819) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the two screws and three connectors and remove the PCB4 (WK-4819).
Disconnect the one connector.
2
CN4
1
CN5
CN4
11 – 11
CN6
ARCMASTER 185ACDC / 200ACDC
3.6 PCB6 (WK-5549) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Disconnect the six connectors.
CN21
CN17
CN1
CN9
CN8
CN20
3) Remove the three screws and five connectors. Remove the PCB6 (WK-5549).
CN27
CN18
CN32
CN30
CN31
3.7 PCB7 (WK-5550) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB6 (WK-5549). [Reference page: 11-12]
3) Remove the two screws and three connectors. Remove the PCB7 (WK-5550).
CN30
CN31
CN32
11 – 12
ARCMASTER 185ACDC / 200ACDC
3.8 PCB8 (WK-5479) (IGBT (Q1~Q6)) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the four screws and two IGBT Chassis.
3) Remove the two connectors and three screws. Remove the PCB8 (WK-5479).
 Remember to install silicone rubber sheets when reinstalling the PCB8 (WK-5479).
CN1
3.9 PCB9 (WK-5479) (IGBT (Q7~Q12)) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the four screws and two IGBT Chassis.
11 – 13
CN2
ARCMASTER 185ACDC / 200ACDC
3) Remove the two connectors and three screws. Remove the PCB9 (WK-5479).
 Remember to install silicone rubber sheets when reinstalling the PCB9 (WK-5479).
CN1
CN2
3.10 PCB10 (WK-5527) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB11 (WK-5528). [Reference page: 11-15]
3) Remove the three latches of Front Control Cover and then the PCB10 (WK-5527).
2
1
1
 When reinstalling the PCB10 (WK-5527), engage two latches of Front Control Cover first.
1
2
11 – 14
ARCMASTER 185ACDC / 200ACDC
3.11 PCB11 (WK-5528) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Protection Cover.
2
2
3
1
3) Remove the Knob Cap. Holding the Knob down, loosen the screw and remove the Knob.
2
1mm
3
1
4) Disconnect the one connector from the PCB10 (WK-5527). Remove the four screws. Pull out the Operation Panel and bring it down.
2
2
1
CN2
3
2
2
11 – 15
ARCMASTER 185ACDC / 200ACDC
5) Remove the one connector and two screws. Remove the PCB11 (WK-5528).
Remove the Encoder Cover from the PCB11 (WK-5528).
2
4
1
CN1
3
3.12 PCB12 (WK-5615), Transformer (T1), Current Trans (CT2) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove PCB13 (WK-5569). [Reference page: 11-19]
3) Disconnect the one connector and cut the one snap band.
CN7
4) Remove the one screw and one nut. Remove the two screws and remove the two terminals.
3
1
11 – 16
2
ARCMASTER 185ACDC / 200ACDC
5) Open the Dust Cover Sheet. Remove the three screws and three terminals.
1
2
2
2
6) Remove the 16 screws.
7) Remove the PCB12 and T1 unit.
11 – 17
ARCMASTER 185ACDC / 200ACDC
8) Cut the one snap band and remove the Current Trans (CT2).
2
1
9) Remove the Dust Cover Sheet. Extend the electrode and remove the T-D Bus Bar1, T-D Bus Bar2 and T
Center Bus Bar.
2
3
2
1
10) Remove the two PCB supporters and cushion.
Remove the four screws and remove the Main Trans (T1).
2
1
4
3
1
11 – 18
ARCMASTER 185ACDC / 200ACDC
3.13 PCB13 (WK-5569) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the four screws. Remove the two terminals and open the Rear Panel.
3
1
4
1
2
2
3) Disconnect the six connectors and remove the two screws and two terminals.
CN2
CN1
CN4
CN6
CN3
CN5
4) Remove the two screws and two PCB supporters and remove the PCB13 (WK-5569).
11 – 19
ARCMASTER 185ACDC / 200ACDC
3.14 PCB16 (WK-5499) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose.
2
1
3) Disconnect the two connectors.
Remove the three PCB supporters and remove the PCB16 (WK-5499).
2
1
CN1
CN3
1
3.15 PCB14 (WK-5570) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB16 (WK-5499). [Reference page: 11-20]
3) Remove the five screws and three terminals and remove the PCB14 (WK-5570).
3
1
2
1
1
1
2
2
11 – 20
ARCMASTER 185ACDC / 200ACDC
4) Remove the three PCB supporters from the PCB14 (WK-5570).
3.16 PCB17 (WK-4917) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the six screws and six terminals.
3) Remove the four screws and then open the Rear Board.
1
1
2
1
1
11 – 21
ARCMASTER 185ACDC / 200ACDC
4) Disconnect the one connector.
Remove the two screws and one ground terminal and remove the PCB17 unit.
2
1
CN1
3
2
4
5) Remove the two screws and remove the S1 Bus Bar from the PCB17 (WK-4917).
2
1
3.17 Discharge Resistor (R3)
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the two bolts, two toothed washers, one washer, and one terminal.
2
2
1
1
3
11 – 22
2
ARCMASTER 185ACDC / 200ACDC
3) Remove the four screws and open the Front Panel.
1
1
2
1
1
4) Cut the one snap band and disconnect the one connector.
1
2
5) Remove the one screw and one nut and remove the one terminal.
11 – 23
CN5
ARCMASTER 185ACDC / 200ACDC
6) Remove the two screws and remove the Discharge Resistor (R3).
1
2
1
3.18 Current Limiting Resistor (R4, R5)
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB2 (WK-5596). [Reference page: 11-7]
3) Remove the one screw and remove the Current Limiting Resistor (R4, R5).
3.19 Resistor on High Frequency Unit (R6) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Cut the one snap band and remove the two terminals. Remove the one screw and remove the Resistor
on High Frequency Unit (R6).
3
4
2
1
11 – 24
ARCMASTER 185ACDC / 200ACDC
3.20 Coupling Coil (CC1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the two bolts, two toothed washers, one washer, and one terminal.
2
2
1
1
3
2
3) Remove the four screws and open the Front Panel.
1
1
2
1
1
4) Remove the two terminals. Remove the one screw and two terminals.
1
2
11 – 25
1
ARCMASTER 185ACDC / 200ACDC
5) Remove the one screw and one nut. Remove the one screw and Coupling Coil (CC1).
1
1
3
2
3.21 Reactor (FCH1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB16 (WK-5499). [Reference page: 11-20]
3) Remove the PCB14 (WK-5570). [Reference page: 11-20]
4) Remove the Coupling Coil (CC1). [Reference page: 11-25]
5) Remove the two posts, two screws and two nuts.
6) Remove the four screws and remove the Reactor (FCH1). Remove the Insulating Sheet.
1
3
2
1
11 – 26
ARCMASTER 185ACDC / 200ACDC
3.22 Primary Thermistor (TH1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Cut the three snap bands. Disconnect the one connector.
Remove the one screw and then detach the Primary Thermistor (TH1).
 Before installing a new therminstor, apply a uniform coat of silicone compound (Shinetsu Silicone G747 or equivalent) on the base.
CN8
3.23 Secondary Thermistor (TH2) 
1)
2)
3)
4)
Remove the Side Panel. [Reference page: 10-2]
Remove the PCB13 (WK-5569). [Reference page: 11-19]
Remove the PCB12 (WK-5615). [Reference page: 11-16]
Remove the one screw and one nut and remove the bus bar.
5) Cut the four snap bands. Disconnect the one connector.
Remove the one screw and then detach the Secondary Thermistor (TH2).
 Before installing a new therminstor, apply a uniform coat of silicone compound
(Shinetsu Silicone G-747 or equivalent) on the base.
CN9
11 – 27
ARCMASTER 185ACDC / 200ACDC
3.24 Cooling Fan (FAN1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the four screws. Remove the two terminals and open the Rear Panel.
3
1
4
1
2
2
3) Cut the four snap bands and disconnect the one connector.
CN11
4) Remove the two screws and detach the Cooling Fan (FAN1).
11 – 28
AIR FLOW
ROTATION
 Do not install the fan in the wrong direction (noting correct air flow).
ARCMASTER 185ACDC / 200ACDC
3.25 Solenoid Valve (SOL1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the four screws. Remove the two terminals and open the Rear Panel.
3
1
4
1
2
2
3) Remove the C-ring and detach the Solenoid Valve (SOL1).
 When reinstalling, make sure that the C-ring seats in the solenoid valve groove.
2
1
3.26 Main ON/OFF Switch (S1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the six screws and six terminals.
11 – 29
ARCMASTER 185ACDC / 200ACDC
3) Remove the two screws and detach the Main ON/OFF Switch (S1). Remove the three posts.
3.27 Input Voltage Switch (S2) 
1) Remove the Side Panel. [Reference page:10-2]
2) Remove six screws and six terminals.
3) Remove four screws and open the Rear Board.
1
1
2
1
1
11 – 30
ARCMASTER 185ACDC / 200ACDC
4) Disconnect the one connector CN4 on the PCB4.
Remove the two screws and two nuts and then remove the Input Voltage Switch (S2).
CN4
3.28 Remote Connector (CON1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Protection Cover.
2
2
3
1
3) Remove the four screws. Pull out the Front Control Cover and bring it down.
1
1
2
1
1
11 – 31
ARCMASTER 185ACDC / 200ACDC
4) Disconnect the two connectors. Remove the one screw and two ground terminals.
2
1
CN15
1
CN14
5) Remove the two screws and Remote Socket (CON1).
2
1
3.29 High Freguency Unit (HF.UNIT1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the High Freguency Gap. Remove the six terminals.
11 – 32
ARCMASTER 185ACDC / 200ACDC
3) Remove the two screws, two washers and detach the High Freguency Unit (HF. UNIT1).
1
2
1
3.30 Hall C.T. (HCT1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the Nylon Hose. Remove the four screws. Remove the two terminals and open the Rear Panel.
3
1
4
1
2
2
3) Remove the one screw and one nut. Disconnect the one connector.
1
CN1
2
1
11 – 33
ARCMASTER 185ACDC / 200ACDC
4) Remove the one screw. Remove the Hall C. T. (HCT1) while slighty pressing down the bus bar.
2
3
1
3.31 Primary Diode (D1) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB2 (WK-5596, WK-5482). [Reference page: 11-7]
3) Remove the two screws and four terminals. Remove the two screws and then detach the Primary Diode
(D1).
 Before installing a new diode, apply a uniform coat of silicone compound (Shinetsu Silicone G-747
or equivalent) on the base.
1
2
3.32 Secondary Diode (D2, D4, D5) 
1) Remove the Side Panel. [Reference page: 10-2]
2) Remove the PCB13 (WK-5569). [Reference page: 11-19]
3) Remove the PCB12 (WK-5615). [Reference page: 11-16]
4) Remove the two screws and two nuts and remove the bus bar.
11 – 34
ARCMASTER 185ACDC / 200ACDC
5) Remove the six screws and then detach the Secondary Diode (D2, D4, D5).
 Do not have the wrong direction of the diodes when reinstalling.
Before installing a new diode, apply a uniform coat of silicone compound (Shinetsu Silicone G-747
or equivalent) on the base.
3.33 Secondary IGBT (Q13) (PCB15 (WK-3367)) 
1) Remove the side cover. [Reference page: 10-2]
2) Remove the PCB16 (WK-5499). [Reference page: 11-20]
3) Remove the PCB14 (WK-5570). [Reference page: 11-20]
4) Remove the one bolt and remove the one toothed washer, one washer and one terminal.
5) Remove the three posts, bus bar and two terminals.
11 – 35
ARCMASTER 185ACDC / 200ACDC
6) Remove the one connector and two screws and remove the Secondary IGBT (Q13).
 Before sinstalling a new IGBT, apply a uniform coat of silicone compound (Shinetsu Silicone G-747
or equivalent) on the base.
CN1
11 – 36
APPENDIX 1 PARTS LIST
1 Equipment Identification
All identification numbers as described in the Introduction chapter must be furnished when ordering parts or
making inquiries. This information is usually found on the nameplate attached to the equipment. Be sure to
include any dash numbers following the Part or Assembly numbers.
2 How To Use This Parts List
The Parts List is a combination of an illustration and a corresponding list of parts which contains a breakdown of the equipment into assemblies, subassemblies, and detail parts. All parts of the equipment are listed
except for commercially available hardware, bulk items such as wire, cable, sleeving, tubing, etc., and permanently attached items which are soldered, riveted, or welded to other parts. The part descriptions may be
indented to show part relationships. To determine the part number, description, quantity, or application of an
item, simply locate the item in question from the illustration and refer to that item number in the corresponding Parts List.
ARC MASTER 185ACDC 10-3073
ARC MASTER 200ACDC 10-3083
No.
1
2
3
4
4
5
6
7
8
9
10
11
12
13
14
14
15
16
17
18
18
19
20
21
22
23
24
25
26
27
28
29
DWG No.
CC1
CON1
CT2
D1
D1
D2
D4
D5
FAN1
FCH1
HCT1
HF.UNIT1
PCB1
PCB2
PCB2
PCB3
PCB4
PCB5
PCB6
PCB6
PCB7
PCB8-9
Part No.
W7001384
W7001595
W7001304
10-6628
10-6769
10-6629
10-6629
10-6629
W7001307
W7001502
10-5003
W7001399
10-6633
W7001402
W7001408
W7001407
W7001314
10-6635
W7001417
W7001726
W7001725
W7001423
W7001318
Description
Coil, Coupling, gen 3.1, IPS
Socket, Remote, gen 3.1, IPS
Transformer, gen 3.1, IPS
Diode, gen 3.1, IPS
Diode, gen 3.1, IPS
Diode, gen 3.1, IPS
Diode, gen 3.1, IPS
Diode, gen 3.1, IPS
Fan, gen 3.1, IPS
Inductor, gen 3.1, IPS
Sensor, Current, gen 3.1, IPS
HF, Unit, gen 3.1, IPS
HF, Gap, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS (185ACDC)
PCB, gen 3.1, IPS (200ACDC)
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, 200 ACDC, gen 3.1, IPS
PCB, 185 ACDC, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB10
PCB11
PCB12
PCB13
PCB14
PCB16
PCB17
Q13
R2
W7001812
W7001320
W7001594
W7001433
W7001434
W7001324
10-6740
10-6643
W7001449
PCB,WK5527 U13,GEN3.1,IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
PCB, gen 3.1, IPS
Transistor, gen 3.1, IPS
Resistor, gen 3.1, IPS
A-1
Additional Information
F3A040600 200A CC
206433-1 8P (with Wiring Assembly)
F2A503001 CT 1:40
DFA50BA160 (185ACDC)
DFA100BA160 (200ACDC)
DBA200UA60
DBA200UA60
DBA200UA60
109E5724H507 DC 24V 16.8W
F3A285101 AC/DC FCH
HC-TN200V4B15M 200A 4V
HF.UNIT (WK-4840 U04)
U0A601100
WK-5477 U01 MAIN_PCB
WK-5482 U01 LINK PCB
WK-5596 U01 CVM CONTROL PCB
WK-5548 U01 DDC PCB
WK-4819 U01 DETECT PCB
WK-5551 U01 CONNECT PCB
WK-5549 U07-3 200A CTRL PCB
WK-5549 U07-2 200A CTRL PCB
WK-5550 U01 FILTER PCB
WK-5479 U01 GATE PCB (with
IRGP20B60PD)
WK-5527 U13 PANEL PCB
WK-5528 U01 ENCODER PCB
WK-5615 U01 DIODE SNUBBER PCB
WK-5569 U01 GATE/INPOSE PCB
WK-5570 U01 IGBT SNUBBER PCB
WK-5499 U01 FILTER PCB
WK-4917 U04 INPUT FILTER PCB
GCA200CA60 (with WK-3367 U04)
ERG3SJ220H 3W 22Ω
QTY.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
2
185ACDC / 200ACDC PARTS LIST
No.
30
31
32
33
33
34
35
DWG No.
R3
R4-5
R6
S1
S1
S2
SOL1
Part No.
10-5137
W7001452
W7001451
W7001453
10-6857
10-5222
10-6645
36
37
38
39
40
41
42
42
43
44
45
46
46
47
48
49
50
51
52
53
54
55
56
57
58
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
74
T1
TH1, 2
W7001456
10-5228
W7001465
W7001466
W7001467
W7001331
W7001469
W7001584
W7001598
10-6791
10-6655
W7001588
W7001587
W7001338
W7001339
W7001340
10-6658
10-6733
W7001586
W7001513
W7001511
10-6659
10-5184
10-6660
N/A
N/A
10-6662
W7001574
W7001575
W7001351
W7001583
W7001582
10-6665
10-6666
W7001585
W7001357
W7001358
W7001576
W7001577
W7001578
10-6699
300X4861
300X4862
Description
Resistor, gen 3.1, IPS
Resistor, gen 3.1, IPS
Resistor, gen 3.1, IPS
Switch, gen 3.1, IPS
Switch, gen 3.1, IPS
Switch, gen 3.1, IPS
Solenoid Valve, gen 3.1, IPS
Additional Information
JG23V101J 68W 100Ω
MHS20A221KI 20W 220Ω
MHS20A101KI 20W 100Ω
DCP-52SR50C-480V 2P-480V (185ACDC)
DCP-103SR100C-480V 3P-480V (200ACDC)
SDKGA4-A-1-A (200ACDC)
5505NBR1.5 DC24V 11VA/10W (with Gas
Inlet and PC4-02)
Transformer, gen 3.1, IPS
F3A063501 200A MAIN TR
Thermistor, gen 3.1, IPS
ERTA53D203 20kΩ/25°CB=3950K
Panel, Front, gen 3.1, IPS
E0D005301
Panel, Rear, gen 3.1, IPS
E0D005501
Label, Side, gen 3.1, IPS
E0D005407
Cover, Front, gen 3.1, IPS
E0C346000
Cover, Rear, gen 3.1, IPS
JCA849400 (185ACDC)
Cover, Rear, gen 3.1, IPS
JDA173200 (200ACDC)
Cover, Protector, gen 3.1, IPS
E0C303200
Cover, Encoder, gen 3.1, IPS
EBA514400
Cover, PCB, gen 3.1, IPS
E1B537600 (with Dustcover Sheet)
Label, Name, gen 3.1, IPS
N4A932900 (200ACDC)
Label, Name, gen 3.1, IPS
N4A932800 (185ACDC)
Label, Side, gen 3.1, IPS
N4A785200
Label, 1 Warning, gen 3.1, IPS
N1B029700
Label, 2 Warning, gen 3.1, IPS
N1B029800
Label, Output Term, gen 3.1, IPS
N4A040100
Label, Gas Input, gen 3.1, IPS
N4A040700
Label, Switch, gen 3.1, IPS
N4A148700
Label, VRD, gen 3.1, IPS
N4A918800
Label, VRD, gen 3.1, IPS
N4A598700
Outlet, Gas, gen 3.1, IPS
E5A925600 (with PC4-02)
C-Ring, gen 3.1, IPS
53003000600
Terminal Output F, gen 3.1, IPS
TRAK-BE35-70S
Cable, Input, gen 3.1, IPS
SOOW AWG 12x4C (200ACDC)
Cable, Input, gen 3.1, IPS
132"10/3SOWBLKW/R650 (185ACDC)
Clamp, Input, gen 3.1, IPS
EBA045800
Heatsink, gen 3.1, IPS
E1B869900
Heatsink, gen 3.1, IPS
E1B870000
Clip,Spring IGBT, gen 3.1, IPS
E1B850100
Chassis, PCB1, gen 3.1, IPS
J5B017400
Chassis, gen 3.1, IPS
J3C356500
Knob, gen 3.1, IPS
2621603
Knob Cap, gen 3.1, IPS
3021104
Cover, Protector, gen 3.1, IPS
N1B016200
Sheet, Rubber, gen 3.1, IPS
EDA227700
Post, 1(M5), gen 3.1, IPS
EBA643600 (M5-M5)
Bus Bar, 1 D-L, gen 3.1, IPS
ECA879500
Bus Bar, 2 D-L, gen 3.1, IPS
ECA879600
Bus Bar, 1 T-D, gen 3.1, IPS
ECA887200
Bus Bar, 2 T-D, gen 3.1, IPS
ECA887300
Operator Manual, gen 3.1, IPS (185ACDC)
Operator Manual, gen 3.1, IPS (200ACDC)
A-2
QTY.
2
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
2
2
1
1
1
2
1
4
1
1
1
1
1
4
3
1
1
1
1
1
1
185ACDC / 200ACDC PARTS LIST
52
48
42
34
47
27
69 74
33
40
74
69
58
45
59
39
84
56
21
35
41
67
44
22
46
66
8
53
51
65
54
43
85
38
40
49
50
57
2
56
57
55
47
A-3
185ACDC / 200ACDC PARTS LIST
18
17
62
16
78
19
15
31
14
20
62
31
4
68
13
81
68
80
64
79
63
20 62
62
30
9
76
79
60
82
61
1
10
60 37
28
79
79
3
83
37
64
32
75
71
6
36
5 7
11
29
25
23
70
26
12
77
73
72
A4
24
APPENDIX 2 CONNECTION WIRING GUIDE
CONNECTION WIRING GUIDE
APPENDIX 2 Connection Wiring Guide
Destination
A
PCB2
CN1
↔
PCB4
CN7
B
PCB2
CN2
↔
PCB3
CN3
C
PCB2
CN3
↔
D1
D
PCB3
CN1
↔
D1
E
PCB3
CN2
↔
PCB17
F
PCB3
CN7
↔
CT2
G
H
PCB3
CN11
↔
FAN1
SOL1
I
PCB3
CN20
↔
PCB8
CN1
J
PCB3
CN21
↔
PCB8
CN2
K
PCB3
CN22
↔
PCB9
CN1
L
PCB3
CN23
↔
PCB9
CN2
M
PCB3
CN18
↔
PCB7
CN20
N
PCB3
CN33
↔
PCB6
CN20
O
PCB4
CN4
↔
S2
P
PCB6
CN1
↔
HCT1
Q
PCB6
CN8
↔
TH1
R
PCB6
CN9
↔
TH2
S
PCB6
CN17
↔
T
PCB6
CN21
U
V
W
X
PCB7
CN14
PCB10
CN15
CN1
PCB13
CN6
CN1
PCB13
CN4
↔
PCB16
PCB10
CN3
CN2
↔
CON1
↔
PCB11
CN1
↔
PCB15
CN1
A5
185ACDC / 200ACDC CONNECTION WIRING GUIDE
T
CN3
CN21
CN17
PCB6
CN1
E
CN20
P
CN8
CN9
W
S2
O
Q
CN1
R
CN2
M
K
L
CN14
CON1
CN2
CN18
CN7
CN11
CN1
J
CN20
CN23
CN21
PCB9
I
CN2
PCB3
TH2
CN1
A
PCB8
CN3
PCB15
B
D
CN22
S
PCB16
FAN1
H
CN1
CN20
U
CN33
SOL1
PCB7
CN15
F
CT2
PCB4
PCB11
V
G
CN2
CN4
CN7
PCB10
CN1
N
TH1
CN1
PCB17
CN3
CN1
PCB2
CN2
CN1
CN6
C
CN4
X
HCT1
D1
PCB13
A6
APPENDIX 3 INTERCONNECT DIAGRAM
APPENDIX 3 INTERCONNECT DIAGRAM
185ACDC
INTERCONNECT DIAGRAM
INTERCONNECT DIAGRAM
R4
R5
K(7)
+
(1)
TB5 TB6
C
E
PCB8 C
PCB1
IGBT Gate
Main
G
Circuit
Circuit Board
Board E
[WK-5493]
[WK-5477] C
TB1
G
G1
1
E
E1
2
C
3
G
P
G(6)
R2
R2
Line2
N
G2
E2
E1C
T(5) (2)
N
Q2
Q3
CN1
(0)
S(4)
C2E
Line1
P
R(3)
S1
Q1
G
TB2
TB2
Q4
E
C
1
2
3
4
CN2
D1
CN3
1
2
Q5
G
E
C
Q6
G
Ground
PCB2
Link
Circuit Board
[WK-5596]
G3
E3
CN131 CN132
CN131 CN132
1 2 3 4 5 6 7
1 2 3 4 5 6
1 2 3 4 5 6 7
CN20
CN21
CN22
CN23
4
7
6
CON1
3
PCB6
Control
Circuit Board
[WK-5549]
CN14
CN17 CN18
CN17 CN18
1
PCB7
2
Filter
CN27
3
Circuit Board
4
CN27
[WK-5550]
5
CN20
8
1
2
1
5
TB0
E
1 2 3 4 5 6
CN130
CN130
CN15
2
EA
Q12
G
CT1
CT2
1 : Chassis Ground
2 : Contactor Control/+24VDC
3 : Contactor Control/GND
4 : Not Used
5 : Potentiometer Maximum
6 : Potentiometer Minimum(GND)
7 : Amperage Control Wiper 0-10VDC
8 : Not Used
EA
E
C
CN20
CN9
CN8
1 2
1 2 3
1 2
CN18
1 2 3
CN19
1 2 3
CN33
1
2
3
A7
E4
G4
PCB3
Control
Souce
Circuit Board
[WK-5548]
1
2
3
4
Q11
G
1 2 3
TH2
TH1
CN17
SOL1
CN31 CN32
CN30
CN31 CN32
CN30
PCB5
Conect Circuit Board
[WK-5551]
CN11
1
2
3
4
CN1
CN4
E
C
P+21V
PGND
+
CN6
CN6
1
2
3
4
Q10
G
1
2
3
4
5
6
7
CN21
E1C
CN5
CN5
FAN1
-
PCB4
Detect
Circuit Board
[WK-4819]
Q9
E
C
E1
G1
1
2
3
4
1
2
3
G4
E4
CN7
R2
CN3
CN4
P
CN2
CN1
1
2
3
4
5
6
C2E
1 2 3
1 2 3 4 5
E
C
G
CN1
1 2 3
Q8
G
1
2
3
4
CN1
REAR
PANEL
TB4
E
C
E2
G2
1 2
PCB9
IGBT Gate
Circuit
Board
[WK-5479]
CN1
SIDE CHASSIS 1
Q7
G
CN2
1
2
3
4
5
CN1
C
E3
G3
E PCB17
Filter
Circuit Board
[WK-4917]
N
E
TB3
CN2
+
1
2
3
4
185ACDC / 200ACDC INTERCONNECT DIAGRAM
TB22
CT2
TB12
Q13
G1 G1
PCB15
IGBT Gate E1 E1
Circuit Board
[WK-3367] G2 G2
D5
CN1
TO1
+Output
Terminal
E2 E2
1 2 3 4 5
AC4
CT1
TB21
CT2
PCB14
IGBT Snubber
Circuit Board
[WK-5570]
G7
E7
D2
TB1
E8
G8
T1
FCH1
D4
AC2
TB7
TB20
SH.DET+
AC1
PCB12
DIODE Snubber
Circuit Board
[WK-5615]
TB2
+
1
2
3
RY+15V
/RY_ON
HCT1
34
12
+15
-15
IS
GND
R1
1
2
CN2
S+15V
1
2
3
SH.DET+
SH.DET-
AC2
AC4
AC3
EB
SG
S+15V
SG
CN8
CN9
R2
R2
AC3
R6
PCB13
Super Inpose
Circuit Board
[WK-5569]
AC3
AC1
1
2
3
4
5
6
7
8
G7
E7
G8
E8
FRONT
PANEL
1 2 3 4 5 6 7
EA
+
Ground
RY+15V
1
2
3
4
5
6
+15
-15
IS
GND
PCB10
Panel
Circuit Board
[WK-5527]
SIDE CHASSIS 2
PCB11
Encoder
Board
[WK-5528]
CN2
1 2 3 4 5 6 7 8 9
AC1
CN5
CN4
/RY_ON
1 2 3 4 5
TB2
1 2
CN6
CN1
P+21V
PGND
CN3
TB1
N
CC1
HF.UNIT1
1
2
3
4
P
PCB16
Filter Circuit
Board
SIDE CHASSIS 3
[WK-5499]
TO2
CC1
-Output
Terminal
CC2
R3
Ground
CN1
CN3
SH.DET-
1 2 3 4 5
CN1
CN1
1 2 3 4
A8
1 2 3 4
185ACDC / 200ACDC INTERCONNECT DIAGRAM
200ACDC
1
2
+
(1)
TB5 TB6
C
E
P
K(7)
PCB8 C
PCB1
IGBT Gate
Main
G
Circuit
Circuit Board
[WK-5493] Board EC
[WK-5479]
G(6)
Line1
P
S1
R(3)
TB1
(0)
TB1
1
2
3
R2
Line2
E
C
Q3
Q4
G
N
G2
E2
N
TB2
1
2
3
4
E
C
CN2
T(5) (2)
Q2
G
G1
E1
R2
S(4)
Line3
Q1
G
CN1
D1
R5
CN3
R4
Q5
G
E
C
TB2
Q6
G
Ground
TB3
PCB17
Filter
Circuit Board
[WK-4917]
E
C
CN2
1 2
REAR
PANEL
TB4
PCB9 C
IGBT GateG
Circuit
Board E
[WK-5479]C
TB4
CN30
CN30
E
1 2 3 4 5 6 7
1 2 3 4 5 6
1 2 3 4 5 6 7
CN20
CN21
CN22
CN23
CN130
CN130
1 : Chassis Ground
2 : Contactor Control/+24VDC
3 : Contactor Control/GND
4 : Not Used
5 : Potentiometer Maximum
6 : Potentiometer Minimum(GND)
7 : Amperage Control Wiper 0-10VDC
8 : Not Used
TB0
1
2
8
1
5
4
7
6
3
CON1
CN18
CN18
1
2
CN27
3
4
CN27
5
PCB7
Filter
Circuit Board
[WK-5550]
CN15
2
CN17
CN17
CN20
EA
CN14
EA
PCB6
Control
Circuit Board
[WK-5549]
CN20
CN9
CN8
1 2
1 2 3
1 2
CN18
1 2 3
CN19
1 2 3
1 2 3
CN33
1
2
3
TH2
A9
TH1
CN17
1 2 3 4 5 6
1
2
3
4
5
6
7
CN21
CN131 CN132
CN131 CN132
CN2
CT1
CT2
E4
G4
1
2
3
4
Q12
G
1
2
3
4
CN1
CN1
CN4
PCB3
Control
Souce
PCB5
Circuit Board
Conect Circuit Board [WK-5548]
[WK-5551]
CN31 CN32
CN31 CN32
CN11
1
2
3
4
CN6
CN6
E
C
E3
G3
CN5
CN5
FAN1
+
SOL1
PCB4
CN7
Detect
Circuit Bord
[WK-4819]
Q11
E2
G2
230V
Q10
G
E1
G1
S2
-
1
2
3
4
1 2 3
1
2
3
4
460V
E
C
E
C
G4
E4
CN7
R2
CN3
CN4
P
CN2
Q9
G
CN1
1
2
3
4
5
6
1 2 3 4 5
1
2
3
CN1
G3
E3
1 2 3
1 2 3
Q8
G
CN1
N
Q7
G
E
1
2
3
4
5
CN1
SIDE CHASSIS 1
E
TB3
PCB2
Link
Circuit Board
[WK-5482]
P+21V
PGND
+
1
2
3
4
185ACDC / 200ACDC INTERCONNECT DIAGRAM
T1
TB20
TB22
TB12
FCH1
PCB14
IGBT Snubber
Circuit Board
[WK-5570]
Q13
D4
AC2
TB7
SH.DET+
AC1
PCB12
DIODE Snubber
Circuit Board
[WK-5615]
CT2
G1 G1
PCB15
IGBT Gate E1 E1
Circuit Board
[WK-3367] G2 G2
D5
TB21
E2 E2
G7
E7
D2
TB1
E8
G8
1 2 3 4 5
AC4
CT2
CT1
CN1
TO1
+Output
Terminal
TB2
+
1 2 3 4 5
Ground
1
2
3
RY+15V
/RY_ON
HCT1
CN3
SH.DET-
CN1
PCB16
Filter Circuit
Board
SIDE CHASSIS 3
[WK-5499]
TO2
CC1
-Output
Terminal
34
12
CC2
+15
-15
IS
GND
R3
CC1
R1
HF.UNIT1
1 2
TB1
1
2
CN2
S+15V
1
2
3
CN8
CN9
AC3
AC1
1
2
3
4
5
6
7
8
G7
E7
G8
E8
FRONT
PANEL
1 2 3 4 5 6 7
EA
+
Ground
RY+15V
PCB10
Panel
Circuit Board
[WK-5527]
1
2
3
4
5
6
+15
-15
IS
GND
SIDE CHASSIS 2
PCB11
Encoder
Board
[WK-5528]
CN2
1 2 3 4 5 6 7 8 9
PCB13
Super Inpose
Circuit Board
[WK-5569]
CN4
/RY_ON
1 2 3 4 5
R6
CN6
P+21V
PGND
SG
AC1
CN5
CN3
SH.DET+
SH.DET-
AC2
AC3
AC4
EB
S+15V
SG
N
TB2
CN1
1
2
3
4
P
R2
R2
AC3
CN1
CN1
1 2 3 4
A10
1 2 3 4
APPENDIX 4 DIODE TESTING BASICS
DIODE TESTING BASIC
Testing of diode modules requires a digital Volt/
Ohmmeter that has a diode test scale.Locate the
diode module to be tested.Remove cables from
mounting studs on diodes to isolate them within the
module.Set the digital volt/ohm meter to the diode
test scale.Using figure 1 and 2, check each diode
in the module. Each diode must be checked in both
the forward bias (positive to negative) and reverse
bias (negative to positive) direction.
APPENDIX 4 DIODE TESTING BASIC
VR
1. To check the diode in the forward bias direction, connect the volt/ohm meter positive lead
to the anode (positive, +) of the diode and the
negative lead to the cathode (negative, –) of
the diode (refer to Figure 13-1). A properly
functioning diode will conduct in the forward
bias direction, and will indicate between 0.3
and 0.9 volts.
COM
A
Forward Bias
Diode Conducting
Anode
2. To check the diode in the reverse bias direction, reverse the meter leads (refer to Figure
13-1). A properly functioning diode will block
current flow in the reverse bias direction, and
depending on the meter function, will indicate
an open or "OL".
Cathode
Figure 13-1: Forward bias diode test
3. If any diode in the module tests as faulty,
replace the diode module.
4. Reconnect all cables to the proper terminals.
VR
COM
Reverse Bias
Diode Not Conducting
Cathode
Anode
Figure 13-2: Reverse bias diode test
A11
A
LIMITED WARRANTY
This information applies to Thermal Arc products that were purchased in the USA and Canada.
April 2006
LIMITED WARRANTY: Thermal Arc®, Inc., A Thermadyne Company ("Thermal Arc"),
warrants to customers of authorized distributors ("Purchaser") that its products will be free
of defects in workmanship or material. Should any failure to conform to this warranty
appear within the warranty period stated below, Thermal Arc shall, upon notification
thereof and substantiation that the product has been stored, installed, operated, and
maintained in accordance with Thermal Arc's specifications, instructions,
recommendations and recognized standard industry practice, and not subject to misuse,
repair, neglect, alteration, or damage, correct such defects by suitable repair or
replacement, at Thermal Arc's sole option, of any components or parts of the product
determined by Thermal Arc to be defective.
This warranty is exclusive and in lieu of any warranty of
merchantability, fitness for any particular purpose, or other warranty of
quality, whether express, implied, or statutory.
Limitation of liability: Thermal Arc shall not under any circumstances be liable for special,
indirect, incidental, or consequential damages, including but not limited to lost profits and
business interruption. The remedies of the purchaser set forth herein are exclusive, and
the liability of thermal arc with respect to any contract, or anything done in connection
therewith such as the performance or breach thereof, or from the manufacture, sale,
delivery, resale, or use of any goods covered by or furnished by Thermal Arc, whether
arising out of contract, tort, including negligence or strict liability, or under any warranty,
or otherwise, shall not exceed the price of the goods upon which such liability is based.
No employee, agent, or representative of thermal arc is authorized to change this
warranty in any way or grant any other warranty, and thermal arc shall not be bound by
any such attempt. Correction of non-conformities, in the manner and time provided
herein, constitutes fulfillment of thermal’s obligations to purchaser with respect to the
product.
This warranty is void, and seller bears no liability hereunder, if purchaser used
replacement parts or accessories which, in thermal arc's sole judgment, impaired the
safety or performance of any thermal arc product. Purchaser’s rights under this warranty
are void if the product is sold to purchaser by unauthorized persons.
The warranty is effective for the time stated below beginning on the date that the
authorized distributor delivers the products to the Purchaser. Notwithstanding the
foregoing, in no event shall the warranty period extend more than the time stated plus
one year from the date Thermal Arc delivered the product to the authorized distributor.
Warranty repairs or replacement claims under this limited warranty must be submitted to
Thermal Arc via an authorized Thermal Arc repair facility within thirty (30) days of
purchaser's discovery of any defect. Thermal Arc shall pay no transportation costs of any
kind under this warranty. Transportation charges to send products to an authorized
warranty repair facility shall be the responsibility of the Purchaser. All returned goods
shall be at the Purchaser's risk and expense. This warranty dated April 1st 2006
supersedes all previous Thermal Arc warranties. Thermal Arc® is a Registered
Trademark of Thermal Arc, Inc.
WARRANTY SCHEDULE
This information applies to Thermal Arc products that were purchased in the USA and Canada.
April 2006
ENGINE DRIVEN WELDERS
W ARRANTY P ERIOD
Scout, Raider, Explorer
Original Main Power Stators and Inductors .................................................................................. 3 years
LABOR
3 years
Original Main Power Rectifiers, Control P.C. Boards ................................................................... 3 years
3 years
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, power switch semi-conductors .......................................... 1 year
1 year
Engines and associated components are NOT warranted by Thermal Arc, although
most are warranted by the engine manufacturer ............................................................. See the Engine Manufactures Warranty for
Details
GMAW/FCAW (MIG) WELDING EQUIPMENT
W ARRANTY P ERIOD
LABOR
Fabricator 131, 181; 190, 210, 251, 281; Fabstar 4030;
PowerMaster 350, 350P, 500, 500P; Excelarc 6045.
Wire Feeders; Ultrafeed, Portafeed
Original Main Power Transformer and Inductor............................................................................ 5 years
3 years
Original Main Power Rectifiers, Control P.C. Boards, power switch semi-conductors ................. 3 years
3 years
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, electric motors................................................................... 1 year
1 year
GTAW (TIG) & MULTI-PROCESS INVERTER WELDING EQUIPMENT
W ARRANTY P ERIOD
LABOR
160TS, 300TS, 400TS, 185AC/DC, 200AC/DC, 300AC/DC, 400GTSW, 400MST,
300MST, 400MSTP
Original Main Power Magnetics.................................................................................................... 5 years
3 years
Original Main Power Rectifiers, Control P.C. Boards, power switch semi-conductors ................. 3 years
3 years
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, electric motors................................................................... 1 year
1 year
PLASMA WELDING EQUIPMENT
W ARRANTY P ERIOD
LABOR
Ultima 150
Original Main Power Magnetics.................................................................................................... 5 years
3 years
Original Main Power Rectifiers, Control P.C. Boards, power switch semi-conductors ................. 3 years
3 years
Welding Console, Weld Controller, Weld Timer ........................................................................... 3 years
3 years
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, electric motors, Coolant Recirculator. ............................... 1 year
1 year
SMAW (Stick) WELDING EQUIPMENT
W ARRANTY P ERIOD
LABOR
Dragster 85
Original Main Power Magnetics..................................................................................................... 1 year
1 year
Original Main Power Rectifiers, Control P.C. Boards .................................................................... 1 year
1 year
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, power switch semi-conductors .......................................... 1 year
1 year
160S, 300S, 400S
Original Main Power Magnetics.................................................................................................... 5 years
3 years
Original Main Power Rectifiers, Control P.C. Boards ................................................................... 3 years
3 years
All other original circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, power switch semi-conductors .......................................... 1 year
1 year
GENERAL ARC EQUIPMENT
W ARRANTY P ERIOD
LABOR
Water Recirculators ....................................................................................................................... 1 year
1 year
Plasma Welding Torches.............................................................................................................180 days
180 days
Gas Regulators (Supplied with power sources) ..........................................................................180 days
Nil
MIG and TIG Torches (Supplied with power sources)..................................................................90 days
Replacement repair parts .............................................................................................................90 days
Nil
Nil
MIG, TIG and Plasma welding torch consumable items................................................................... Nil
Nil
GLOBAL CUSTOMER SERVICE CONTACT INFORMATION
Thermadyne USA
Thermadyne Asia Sdn Bhd
2800 Airport Road
Denton, Tx 76207 USA
Telephone: (940) 566-2000
800-426-1888
Fax: 800-535-0557
Email: [email protected]
Lot 151, Jalan Industri 3/5A
Rawang Integrated Industrial Park - Jln Batu Arang
48000 Rawang Selangor Darul Ehsan
West Malaysia
Telephone: 603+ 6092 2988
Fax : 603+ 6092 1085
Thermadyne Canada
Cigweld, Australia
2070 Wyecroft Road
Oakville, Ontario
Canada, L6L5V6
Telephone: (905)-827-1111
Fax: 905-827-3648
71 Gower Street
Preston, Victoria
Australia, 3072
Telephone: 61-3-9474-7400
Fax: 61-3-9474-7510
Thermadyne Europe
Thermadyne Italy
Europe Building
Chorley North Industrial Park
Chorley, Lancashire
England, PR6 7Bx
Telephone: 44-1257-261755
Fax: 44-1257-224800
OCIM, S.r.L.
Via Benaco, 3
20098 S. Giuliano
Milan, Italy
Tel: (39) 02-98 80320
Fax: (39) 02-98 281773
Thermadyne, China
Thermadyne International
RM 102A
685 Ding Xi Rd
Chang Ning District
Shanghai, PR, 200052
Telephone: 86-21-69171135
Fax: 86-21-69171139
2070 Wyecroft Road
Oakville, Ontario
Canada, L6L5V6
Telephone: (905)-827-9777
Fax: 905-827-9797
World Headquarters
Thermadyne Holdings Corporation
Suite 300, 16052 Swingley Ridge Road
St. Louis, MO 63017
Telephone: (636) 728-3000
Fascimile: (636) 728-3010
Email: [email protected]
www.thermalarc.com
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