Lincoln Electric V350-PRO, SVM152-A User Manual
SVM152-A
JULY, 2000
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
. . . and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READING THIS MANUAL AND THE
SAFETY PRECAUTIONS CONTAINED THROUGHOUT. And,
most importantly, think before
you act and be careful.
SERVICE MANUAL
For use with machine code numbers 10651, 10669
INVERTEC V350-PRO
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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
View Safety Info View Safety Info View Safety Info View Safety Info
RETURN TO MAIN INDEX
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Copyright © 2000 Lincoln Global Inc.
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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
i
SAFETY
i
FOR ENGINE
powered equipment.
1.a. Turn the engine off before troubleshooting and maintenance
work unless the maintenance work requires it to be running.
____________________________________________________
1.b.Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes
outdoors.
____________________________________________________
1.c. Do not add the fuel near an open flame welding arc or when the engine is running. Stop
the engine and allow it to cool before refueling to prevent spilled fuel from vaporizing on
contact with hot engine parts and igniting. Do
not spill fuel when filling tank. If fuel is spilled,
wipe it up and do not start engine until fumes
have been eliminated.
____________________________________________________
1.d. Keep all equipment safety guards, covers and devices in position and in good repair.Keep hands, hair, clothing and tools
away from V-belts, gears, fans and all other moving parts
when starting, operating or repairing equipment.
____________________________________________________
1.e. In some cases it may be necessary to remove safety
guards to perform required maintenance. Remove
guards only when necessary and replace them when the
maintenance requiring their removal is complete.
Always use the greatest care when working near moving
parts.
___________________________________________________
1.f. Do not put your hands near the engine fan.
Do not attempt to override the governor or
idler by pushing on the throttle control rods
while the engine is running.
___________________________________________________
1.g. To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenance
work, disconnect the spark plug wires, distributor cap or
magneto wire as appropriate.
ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.
KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.
Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you
purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040,
Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the
Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.
BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
WARNING
Mar ‘95
ELECTRIC AND
MAGNETIC FIELDS
may be dangerous
2.a. Electric current flowing through any conductor causes
localized Electric and Magnetic Fields (EMF). Welding
current creates EMF fields around welding cables and
welding machines
2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.
2.c. Exposure to EMF fields in welding may have other health
effects which are now not known.
2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:
2.d.1.
Route the electrode and work cables together - Secure
them with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode and
work cables. If the electrode cable is on your right
side, the work cable should also be on your right side.
2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.
2.d.5. Do not work next to welding power source.
1.h. To avoid scalding, do not remove the
radiator pressure cap when the engine is
hot.
CALIFORNIA PROPOSITION 65 WARNINGS
Diesel engine exhaust and some of its constituents
are known to the State of California to cause cancer, birth defects, and other reproductive harm.
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
The Above For Diesel Engines
The Above For Gasoline Engines
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
ii
SAFETY
ii
ARC RAYS can burn.
4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks and
the rays of the arc when welding or observing
open arc welding. Headshield and filter lens
should conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
ELECTRIC SHOCK can kill.
3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare
skin or wet clothing. Wear dry, hole-free
gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.
In addition to the normal safety precautions, if welding
must be performed under electrically hazardous
conditions (in damp locations or while wearing wet
clothing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable or
accidental contact with the workpiece or ground) use
the following equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.
3.f.
Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
FUMES AND GASES
can be dangerous.
5.a.Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases.When welding, keep
your head out of the fume. Use enough
ventilation and/or exhaust at the arc to keep
fumes and gases away from the breathing zone. When
welding with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.
5.b.
Do not weld in locations near chlorinated hydrocarbon
vapors
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors
to
form phosgene, a highly toxic gas, and other irritating
products.
5.c. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.
5.d. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.
5.e. Also see item 1.b.
Mar ‘95
SAFETY
iii iii
V350-PRO
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FOR ELECTRICALLY
powered equipment.
8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s
recommendations.
8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
CYLINDER may explode
if damaged.
7.a. Use only compressed gas cylinders
containing the correct shielding gas for the
process used and properly operating
regulators designed for the gas and
pressure used. All hoses, fittings, etc. should be suitable for
the application and maintained in good condition.
7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.
7.c. Cylinders should be located:
•Away from areas where they may be struck or subjected to
physical damage.
• A safe distance from arc welding or cutting operations and
any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.
7.g. Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,” available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.
Mar ‘95
WELDING SPARKS can
cause fire or explosion.
6.a.
Remove fire hazards from the welding area.
If this is not possible, cover them to prevent
the welding sparks from starting a fire.
Remember that welding sparks and hot
materials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near
hydraulic lines. Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.
6.c. When not welding, make certain no part of the electrode
circuit is touching the work or ground. Accidental contact can
cause overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside. They can cause an explosion even
though
they have
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
Preparation
for Welding and Cutting of
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society
(see address above).
6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.
6.f.
Sparks and spatter are thrown from the welding arc. Wear oil
free protective garments such as leather gloves, heavy shirt,
cuffless trousers, high shoes and a cap over your hair. Wear
ear plugs when welding out of position or in confined places.
Always wear safety glasses with side shields when in a
welding area.
6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate circuits.
This can create fire hazards or overheat lifting chains or
cables until they fail.
6.h. Also see item 1.c.
SAFETY
iv iv
V350-PRO
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PRÉCAUTIONS DE SÛRETÉ
Pour votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suivantes:
Sûreté Pour Soudage A L’Arc
1. Protegez-vous contre la secousse électrique:
a. Les circuits à l’électrode et à la piéce sont sous tension
quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.
b. Faire trés attention de bien s’isoler de la masse quand on
soude dans des endroits humides, ou sur un plancher metallique ou des grilles metalliques, principalement dans
les positions assis ou couché pour lesquelles une grande
partie du corps peut être en contact avec la masse.
c. Maintenir le porte-électrode, la pince de masse, le câble de
soudage et la machine à souder en bon et sûr état defonctionnement.
d.Ne jamais plonger le porte-électrode dans l’eau pour le
refroidir.
e. Ne jamais toucher simultanément les parties sous tension
des porte-électrodes connectés à deux machines à souder
parce que la tension entre les deux pinces peut être le total
de la tension à vide des deux machines.
f. Si on utilise la machine à souder comme une source de
courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.
2. Dans le cas de travail au dessus du niveau du sol, se protéger
contre les chutes dans le cas ou on recoit un choc. Ne jamais
enrouler le câble-électrode autour de n’importe quelle partie du
corps.
3. Un coup d’arc peut être plus sévère qu’un coup de soliel, donc:
a. Utiliser un bon masque avec un verre filtrant approprié ainsi
qu’un verre blanc afin de se protéger les yeux du rayonnement de l’arc et des projections quand on soude ou
quand on regarde l’arc.
b. Porter des vêtements convenables afin de protéger la peau
de soudeur et des aides contre le rayonnement de l‘arc.
c. Protéger l’autre personnel travaillant à proximité au
soudage à l’aide d’écrans appropriés et non-inflammables.
4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pantalons sans revers, et chaussures montantes.
5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.
6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir tout risque d’incendie dû aux étincelles.
7. Quand on ne soude pas, poser la pince à une endroit isolé de
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.
8. S’assurer que la masse est connectée le plus prés possible de
la zone de travail qu’il est pratique de le faire. Si on place la
masse sur la charpente de la construction ou d’autres endroits
éloignés de la zone de travail, on augmente le risque de voir
passer le courant de soudage par les chaines de levage,
câbles de grue, ou autres circuits. Cela peut provoquer des
risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.
9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.
10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
du solvant pour produire du phosgéne (gas fortement toxique)
ou autres produits irritants.
11. Pour obtenir de plus amples renseignements sur la sûreté, voir
le code “Code for safety in welding and cutting” CSA Standard
W 117.2-1974.
PRÉCAUTIONS DE SÛRETÉ POUR
LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR
1. Relier à la terre le chassis du poste conformement au code de
l’électricité et aux recommendations du fabricant. Le dispositif
de montage ou la piece à souder doit être branché à une
bonne mise à la terre.
2. Autant que possible, I’installation et l’entretien du poste seront
effectués par un électricien qualifié.
3. Avant de faires des travaux à l’interieur de poste, la debrancher à l’interrupteur à la boite de fusibles.
4. Garder tous les couvercles et dispositifs de sûreté à leur place.
MASTER TABLE OF CONTENTS FOR ALL SECTIONS
v v
V350-PRO
Page
Safety.................................................................................................................................................i-iv
Installation.............................................................................................................................Section A
Operation...............................................................................................................................Section B
Accessories...........................................................................................................................Section C
Maintenance .........................................................................................................................Section D
Theory of Operation .............................................................................................................Section E
Troubleshooting and Repair.................................................................................................Section F
How to Use Troubleshooting Guide............................................................................................F-2
Troubleshooting Guide................................................................................................................F-4
Test Procedures ........................................................................................................................F-15
Replacement Procedures .........................................................................................................F-51
Electrical Diagrams..............................................................................................................Section G
Parts Manual....................................................................................................................P-369 Series
RETURN TO MAIN INDEX
SectionA-1 Section A-1
V350-PRO
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TABLE OF CONTENTS
- INSTALLATION SECTION -
Installation
Technical Specifications .............................................................................................................A-2
Input Grounding Connections....................................................................................................A-3
Power Cord Connection.............................................................................................................A-3
Single Phase Input ...............................................................................................................A-3
Three Phase Input.............................................................................................................. ..A-3
Parallel Operation.......................................................................................................................A-3
Quick Disconnect Plugs .............................................................................................................A-3
V350-PRO
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A-2
INSTALLATION
A-2
TECHNICAL SPECIFICATIONS -
INVERTEC V350-PRO
INPUT AC VOLTAGE & DC OUTPUT
OUTPUT CABLES, CONNECTIONS AND LIMITATIONS
Product Ordering Input AC Rated DC Output Output Weight
Name Information Voltage Amps/Volts/Duty Cycle Range with Cord HxWxD
(continuous)
K1728-1 200-230 / 200-230/ 350A / 34V / 60%
Factory 380-415/ Factory
460-480/ 275A / 31V / 100% 82.5lbs 14.7”x12.5”x
Invertec 575 (37.4 kg) 27.8”*
V350- K1728-2 3 Phase AMPS (373x318x
PRO Construction 60/50 Hz 5-425 Construction 706*)mm
60/50 Hz
81.5lbs
208-230/ 350A / 34V / 60% (36.9 kg) * Includes
K1728-3 415/ handles
“CE” 460-480/ 275A / 31V /100%
575
1 Phase
* Overall Length Including Handle, 27.8” (706mm) without handle.
Select the output cable size based upon the following chart.
Cable sizes for Combined Length of Electrode and Work Cable (Copper) 75C rated:
DUTY CYCLE CURRENT LENGTH UP 61m (200 FT) 61-76m (200-250 FT)
100% 275 1/0 1/0
60% 350 1/0 2/0
V350-PRO INPUT CURRENT
1. When operating on these inputs, the line cord should be changed to an input conductor of 6 AWG or larger.
Recommended Fuse Sizes Based On The U.S. National Electrical Code And Maximum Machine Outputs
Input 50/60 Hz Output Recommended
Voltage Phases 275Amps@ 350Amps@ Line Cord Size Fuse Size Notes
31Volts(100%) 34Volts(60%)
208 1 70 94 2 125A Note 1
230 1 62 85 4 125A Note 1
415 1 38 54 6 80A Note 1
460 1 34 42 8 70A
575 1 27 37 8 50A
200 3 37 50 8 80A Note 1
208 3 36 50 6 80A Note 1
230 3 31 42 8 70A
380 3 21 28 8 50A
400 3 20 27 8 50A
415 3 19 26 8 50A
460 3 17 23 8 50A
575 3 14 18 8 35A
INSTALLATION
A-3 A-3
V350-PRO
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INPUT AND GROUNDING CONNECTIONS
1. Only a qualified electrician should connect the
Invertec V350-PRO. Installation should be made
in accordance with the U.S. National Electrical
Code, all local codes and the information detailed
below.
2. When received directly from the factory, multiple
voltage machines are internally connected for
460VAC. If 460VAC is the desired input, then the
machine may be connected to the power system
without any setup required inside the machine.
3. Initial 200VAC - 415VAC and 575VAC operation
will require an Input voltage panel setup.
• Open the access panel on the rear of the
machine.
• For 200 or 230: Position the large switch to 200-
230.
For higher voltages: Position the large switch to
380-575.
• Move the "A" lead to the appropriate terminal.
POWER CORD CONNECTION
A 10 ft. (3.0m) power cord is provided and wired into
the machine. Follow the power cord connection
instructions. Incorrect connection may result in equipment damage.
INSTALLATION
ELECTRIC SHOCK can kill.
• TURN THE INPUT POWER OFF AT
THE DISCONNECT SWITCH BEFORE
ATTEMPTING TO CONNECT OR DIS-
CONNECT INPUT POWER LINES, OUTPUT
CABLES, OR CONTROL CABLES.
• Only qualified personnel should perform this
installation.
• Connect the green lead of the power cord to
ground per U.S. National Electrical Code.
--------------------------------------------------------------------
WARNING
Single Phase Input
1. Connect green lead to ground per U.S. National
Electrical Code.
2. Connect black and white leads to power.
3. Wrap red lead with tape to provide 600V insulation.
Three Phase Input
1. Connect green lead to ground per U.S. National
Electric Code.
2. Connect black, red and white leads to power.
Install in accordance with all local and national
electric codes.
PARALLEL OPERATION
The V350-Pro are operable in parallel in CC mode.
For best results, the currents of each machine should
be reasonably well shared. As an example, with two
machines set up in parallel for a 400 amp procedure,
each machine should be set to deliver approximately
200 amps, not 300 amps from one and 100 amps
from the other. This will minimize nuisance shutdown
conditions. In general, more than two machines in
parallel will not be effective due to the voltage
requirements of procedures in that power range.
To set machine outputs, start with output control pots
and arc control pots in identical positions. Use the
output control pots to balance the currents and maintain the desired voltage or current. The arc control
pots should be kept identical on the two machines.
QUICK DISCONNECT PLUGS
A quick disconnect system is used for the welding
cable connections. The welding plug included with the
machine is designed to accept a welding cable size of
1/0 to 2/0.
1. Remote 25mm (1 in.) of welding cable insulation.
2. Slide rubber boot onto cable end. The boot end
may be trimmed to match the cable diameter.
Soap or other lubricant will help to slide the boot
over the cable.
3. Slide the copper tube into the brass plug.
4. Insert cable into copper tube.
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ELECTRIC
INVERTEC V350-PRO
WARNING
WARNING
AVISO DE
PRECAUCION
ATTENTION
!
!
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GREEN
RED
BLACK
WHITE
25 mm
1 in.
WELDING CABLE
BOOT
TRIM
INSTALLATION
A-4 A-4
V350-PRO
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5. Tighten set screw to collapse copper tube. Screw
must apply pressure against welding cable. The
top of the set screw will be well below the surface
of the brass plug after tightening.
6. Slide rubber boot over brass plug. The rubber
boot must be positioned to completely cover all
electrical surfaces after the plug is locked into the
receptacle.
SET SCREW
BRASS PLUG
COPPER TUBE
Section B-1 Section B-1
V350-PRO
TABLE OF CONTENTS
- OPERATION SECTION -
Operation...............................................................................................................................Section B
Operating Instructions................................................................................................................B-2
Product Description .............................................................................................................B-2
Duty Cycle............................................................................................................................B-2
Operational Features and Controls ............................................................................................B-2
Upper Control Panel...................................................................................................................B-2
Amps Meter ..........................................................................................................................B-2
Volt Meter.............................................................................................................................B-2
Output Control......................................................................................................................B-2
Weld Terminals.....................................................................................................................B-2
Thermal.................................................................................................................................B-3
Control Remote....................................................................................................................B-3
Hidden Middle Control Panel .....................................................................................................B-3
Weld Mode Select................................................................................................................B-3
CC-Stick Soft..................................................................................................................B-3
CC-Stick Crisp ................................................................................................................B-3
TIG GTAW.......................................................................................................................B-4
CV-Wire...........................................................................................................................B-4
CV-Flux Cored ................................................................................................................B-4
Hot Start & Arc Control........................................................................................................B-4
Lower Case Front.......................................................................................................................B-4
CV Modes.............................................................................................................................B-4
TIG Mode ....................................................................................................................... ......B-5
CC-Stick Modes................................................................................................................. ..B-5
Types of Remote Output Control ................................................................................................B-5
Types of Remote Weld Terminal Control ....................................................................................B-5
Design Features and Advantages...............................................................................................B-5
Auxiliary Power................................................................................................................ ...........B-6
Limitations...................................................................................................................................B-6
Recommended Processes..........................................................................................................B-6
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B-2
B-2
V350-PRO
OPERATION
OPERATING INSTRUCTIONS
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground.
• Always wear dry insulating gloves.
------------------------------------------------------------------------
FUMES AND GASES can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to remove
fumes from breathing zone.
-------------------------------------------------------
-----------------
WELDING SPARKS can cause fire or
explosion.
• Keep flammable material away.
• Do not weld on closed containers.
------------------------------------------------------------------------
ARC RAYS can burn eyes and skin.
• Wear eye, ear and body
protection.
------------------------------------------------------------
See additional warning information at
front of this operators manual.
-----------------------------------------------------------
WARNING
GENERAL DESCRIPTION
PRODUCT DESCRIPTION
The Invertec V350-Pro offers multi mode CV and CC
DC welding and is rated 350 amps, 34 volts at a 60%
duty cycle. The V350-Pro is available in European and
Rest of the World (North America and Export) versions.
Differences between these versions are input ratings
and CE noise filtering. In the different configurations,
the V350-Pro is available in either a construction version (no wire feeder connection and auxiliary power)
and a factory version (includes wire feeder connection
and related power).
DUTY CYCLE
The V350-Pro is rated at 350 amps, 60% duty cycle
(based on a 10 minute cycle). It is also rated at 275
amps, 100% duty cycle.
OPERATIONAL FEATURES and CONTROLS:
UPPER CONTROL PANEL
1. AMPS Meter
• Prior to STICK or TIG operation (current flow), the
meter displays preset current value (either 2 amps or
+/- 3% (e.g. 3 amps on 100), whichever is greater).
• Prior to CV operation, the meter displays four dashes indicating non-presetable AMPS.
• During welding, this meter displays actual average
amps.
• After welding, the meter holds the actual current
value for 5 seconds. Output adjustment while in the
"hold" period results in the "prior to operation" characteristics stated above. The displays blink indicating that the machine is in the "Hold" period.
2. VOLT METER
• Prior to CV operation (current flow), the meter displays desired preset voltage value (+/- .5V).
• Prior to STICK or TIG operation, the meter displays
the Open Circuit Voltage of the Power Source or
four dashes if the output has not been turned on.
• During welding, this meter displays actual average
volts.
• After welding, the meter holds the actual voltage
value for 5 seconds. The displays blink indicating
that the machine is in the "Hold" period.
• Output adjustment while in the "hold" period results
in the "prior to operation" characteristics stated
above.
3. OUTPUT CONTROL
• Output control is conducted via a single turn potentiometer.
• Adjustment is indicated by the meters as stated
above.
• When in TIG modes, this control sets the maximum
welding current. Full depression of a foot or hand
Amptrol results in the preset level of current.
4. WELD TERMINALS-REMOTE , ON
• Two status lights indicate the location of trigger
control as determined by the "WELD TERMINALS"
push button.
• If trigger control is local "weld terminals on", the ON
display will be lit.
• If trigger control is remote "weld terminals remotely
controlled", the REMOTE display will be lit.
• The unit will power up in "pre-determined preferred"
trigger modes.
For the Construction version all modes ON.
For the Factory version
STICK = ON
TIG and CV = ON or REMOTE depending if remote
output controls are connected to the machine.
OPERATION
B-3 B-3
V350-PRO
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For both the Construction and Factory versions,
these trigger modes can be over-ridden (switched)
with the WELD TERMINALS push button. When
changed, the unit will power up in the configuration it
was in when it was last powered down.
5. THERMAL
• This status light indicates when the power source
has been driven into thermal overload. If the output
terminals were "ON", the "ON" light will blink indicating that the output will be turned back on once
the unit cools down to an acceptable temperature
level. If the unit was operating in the "REMOTE"
mode, the trigger will need to be opened before or
after the thermal has cleared and closed after the
machine has cooled down to an acceptable temperature to establish output.
6. CONTROL-REMOTE , LOCAL
• Two status lights indicate the location of output
control as pre-determined by the power sources
auto-configure system.
• The LOCAL display will be lit when control is at the
power source.
• The REMOTE display will be lit when a remote
pot/control is detected.
These Output Control configurations can be overridden (switched) with the CONTROL push button.
When changed, the unit will power up in the configuration it was in when it was last powered down.
Hidden Middle Control Panel – Process
Set Up Panel
The middle control panel is removable to allow for
upgrades (see Field Installed Options/Accessories).
Additionally, this panel is hidden by an access door
to reduce appeared complexity and provide protection
to the controls.
7. WELD MODE SELECT
The Mode Control button selects the following welding modes desired.
CC-STICK SOFT: The Stick Soft process features
continuous control ranging from 5 to 425 amps. This
mode was intended for most SMAW applications, and
Arc Gouging.
• Arc Gouging: Setting the output of the Stick Soft
mode to 425 amps will enable the arc-gouging
mode. The actual output current will depend on
the size of carbon used. The recommended maximum size carbon is 5/16".
• The Hot Start control regulates the starting current
at arc initiation. Hot Start can be adjusted from
minimum (0), with no additional current added at
arc start, to maximum (10), with double the preset
current or 425 amps (max of machine) added for
the first second after arc initiation.
• The Arc Control regulates the Arc Force to adjust
the short circuit current. The minimum setting (-10)
will produce a "soft" arc and will produce minimal
spatter. The maximum setting (+10) will produce a
"crisp" arc and will minimize electrode sticking.
CC-STICK CRISP: The Stick Crisp mode features
continuous control from 5 to 425 amps. This mode
was intended primarily for pipe welding applications.
• The Hot Start control regulates the starting current
at arc initiation. Hot Start can adjust starting current up or down by 25% of the preset value. The
recommended setting for Hot Start is 5 where the
initial current is equal to the preset current.
OFF
OFF
OFF
OFF
ON
T STARAR
WELD MODE
ARC CONTROLOL
CC-STICK SOFT
CC-STICK CRISP
TIG GT
CV
-WIRE
-FLUX CORED
+4
+2
-2
-6+6+6
-10
SOFT
CRISP
+10
-8
+8
10
SELECT
REMOTETE
ON
REMOTETE
LOCAL
WELD
TERMINALS
OUTPUT
CONTROLOL
SELECT
SELECT
MPS
TS
1
6
5
2
3
4
8
7
11
10
12
9
Figure B.1 CASEFRONT
A
MPS
CONTR
REMO
LOCAL
SELECT
m
CC-STICK SOFT
CC-STICK CRISP
TIG GT
CV
CVCV-FLUX CORED
AW
-WIRE
SELECT
OLOLTS
V
OUTPUT
HOHOT ST
TWELD MODE
5
6
4
7
3
8
-6
2
1
9
-8
0
10
ON
OFF
WELD
REMO
ON
ARC CONTR
0
-2
-4-4+4
-10
SOFT
OFF
TERMINALS
SELECT
+2
+8
+10
CRISP
OFF
OFF
OPERATION
B-4 B-4
V350-PRO
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• The Arc Control regulates the relative Slope of the
process. Slope dynamically controls the force the
arc has to penetrate an open root. At the minimum
setting, Arc Control is very soft and is similar to the
Stick Soft mode. At the maximum setting, the slope
is reduced, the OCV is reduced, and the operator
has full control off the arc force required to penetrate an open root joint. For vertical down, open
root pipe welding applications, the recommended
setting is between 8 and 10.
• During welding, a boost circuit increases the available voltage to minimize pop outs. The boost circuit is independent of the OCV and only operates
when an arc is lit.
TIG GTAW: The TIG mode features continuous control from 5 to 425 amps. The TIG mode can be run in
either the TIG touch start or high frequency assisted
start mode.
• The Hot Start control selects the starting mode
desired. Asetting of less than 5, the TIG lift start
mode is selected. The OCV is controlled below 10v
and the short circuit "TIG touch" current is maintained at 25 amps independent of the preset current.
When the tungsten is lifted, an arc is initiated and
the output is regulated at the preset value. Hot
start settings between 0 and 5 regulate the arc initiation current. Asetting of 5 results in the most
positive arc initiation. Asetting of 0 reduces hot
start.
• Hot Start settings between 5 and 10, select high
frequency assisted starting TIG mode. In this
range, the OCV of the machine is controlled
between 50 and 70 volts. If using the Lincoln
K930-1 TIG Module, set the Hot start to 10 for
maximum OCV.
• The Arc Control is not used in the TIG mode.
CV-WIRE: The CV-WIRE mode features continuous
control from 10 to 40 volts. The mode was intended
for most GMAW, FCAW, and MCAW applications.
• The Hot Start control is not used in the CV-WIRE
mode.
• The Arc Control regulates pinch effect. At the minimum setting (-10), minimizes pinch and results in a
soft arc. Low pinch settings are preferable for
welding with gas mixes containing mostly inert
gases. At the maximum setting (+10), maximizes
pinch effect and results in a crisp arc. High pinch
settings are preferable for welding FCAW and
GMAW with CO2.
CV-FLUX CORED: The CV-FLUX CORED mode
features continuous control from 10 to 45 volts. This
mode was designed for self-shielded flux cored wires
that require tight voltage control.
• The Hot Start control is not used in the CV-FLUX
CORED mode.
• The Arc Control regulates pinch effect. At the minimum setting (-10), minimizes pinch and results in a
soft arc. At the maximum setting (+10), maximizes
pinch effect and results in a crisp arc. Most selfshielded wires work well at an Arc Control setting of 5.
8. HOT START and ARC CONTROL features have
different functions depending on the welding Mode
that is active. Each feature is described under the
welding mode heading. (See Item 7 for specified
Mode Operation)
LOWER CASE FRONT
The output studs, line switch and remote connector
are located on the lower case front.
9. Both STUDS contain "Twist-Mate" connector
inserts.
• The Negative stud is configured to accept the
pass through gas system.
10. The ON-OFF switch is a 3-phase circuit breaker
rated at 100 amps per leg.
11. The METER POLARITY switch is located above
the output connectors. The switch provides a
work connection for wire feeder voltmeters.
Place the switch in the position of the electrode
polarity indicated by the decal. The switch does
not change the welding polarity.
12. 6-PIN AMPENOL for remote control.
REMOTE CONTROL of the OUTPUT CONTROL
and WELD TERMINALS
The Invertec V350-Pro has auto sensing of remote
output controls.If after connecting or removing a
remote, the Invertec V350-Pro did not configured the
way you would like the local or remote control settings can be changed by pushing the OUTPUT CONTROL or WELD TERMINAL button. (A user cannot
select between the 6 and 14 pin amphenols.)
CV modes
• The remote will default to the 14-pin amphenol
remote if a remote is connected to either of the 14pin amphenols and the 6-pin amphenol. Note:
Only one of the 14-pin amphenols can have a
remote control connected at a time. If no remote is
connected to either of the 14-pin amphenols then
the remote will default to the 6-pin amphenol if a
remote is connected to it.
• If a remote control is connected to any of the
amphenols the WELD TERMINAL control will
default to REMOTE. If there are not any remote
control devices attached the WELD TERMINAL
control will default to ON.
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OPERATION
B-5 B-5
V350-PRO
TIG mode
• The remote will default to the 6-pin amphenol if a
remote control is connected to the 6-pin amphenol
and one of the 14-pin amphenols. If a remote is
not connected to the 6-pin amphenol then the
remote will default to the 14-pin amphenols if a
remote is connected to one of the 14-pin amphenols.
• If a remote control is connected to any of the
amphenols the WELD TERMINAL control will
default to REMOTE. If there are not any remote
control devices attached the WELD TERMINAL
control will default to ON.
CC-Stick modes
• The remote will default to only the 6-pin amphenol if
a remote is connected to it.
• The WELD TERMINAL control will default to ON
with or without a remote connected.
Types of Remote OUTPUT CONTROL
• The Invertec V350-Pro’s Output Control can be
controlled by either a potentiometer connected
between 77 & 75 with the wiper connected to 76 or
a 0V to 10V DC supply connected between 76 &
75. (76 needs to be positive)
• 14-Pin Amphenol lead 75 is pin G, lead 76 is pin F
and lead 77 is pin E.
• 6-Pin Amphenol lead 75 is pin C, lead 76 is pin B
and lead 77 is pin A.
Potentiometer Control
• The total resistance should be between 2000 ohms
(2K) and 10,000 ohms (10K)
• The machine output will be at minimum when lead
76 (wiper) is at the end of the potentiometer that is
connected to 75. The machine’s output will
increase as the wiper of the potentiometer is moved
to the end that is connected to 77. (Note: In TIG
mode, moving the lead 76 (wiper) to lead 77 would
produce the current that has been set by the
Invertec V350-Pro’s front panel Output Control.)
• Remotes of this type offered by Lincoln Electric are
the K857, K812 and K870.
Voltage Control
• The supply should be an isolated supply. (Not referenced to earth ground, any auxiliary power from
the Invertec V350-Pro or the welding output) The
supply should be capable of supplying at least
20mA.
• 0 volts supplied to 76 will set the Invertec V350-Pro
to minimum output for the mode that has been
selected while 10 volts supplied to 76 will set the
Invertec V350-Pro to the maximum output for the
mode. (Note: In TIG mode, 10 volts supplied to
lead 76 would produce the current that has been
Types of Remote WELD TERMINAL Control
• The Invertec V350-Pro’s Weld Terminals can be
controlled from each of the amphenol connectors.
The circuit has a nominal OCV of 15VDC and
requires a dry contact closure (less than 100 ohms)
to activate the output of the Invertec V350-Pro.
• 14 Pin Amphenols the Weld Terminals are controlled
from pins C (lead 2) and pin D (lead 4). Pin C is
positive.
• 6 Pin Amphenol the Weld Terminals are controlled
from pin D (lead 2) and pin E (lead 4). In the 6-pin
amphenol pin D is positive.
DESIGN FEATURES and ADVANTAGES
• Multiple process DC output range: 5 - 425 amps
• Pre-settable welding outputs.
• Built-in Line Voltage Compensation holds the output
constant over +/- 10% input fluctuations.
• State of the art inverter technology yields high
power efficiency, excellent welding performance,
lightweight, and compact design.
• Utilizes microprocessor control.
• Electronic over current protection.
• Input over voltage protection
• Manual reconnect switch located on the back panel
with a clear reconnect door to allow easy determination of input configuration. The reconnect door is
fastened with _-turn connectors that allow quick
and easy access to the reconnect area. Circuit
breaker protected auxiliary.
• System Self Configure. The power source analyzes the remote controls connected to the amphenols and the desired welding mode to properly
determine the location of trigger and output control.
• Modular options for easy upgrades
• Back lit Status Lights for improved error communication
• Circuit Breaker Input Switch
• F.A.N. (fan as needed). Cooling fan runs only when
necessary
• Thermostatically protected.
• Designed to the IEC 974-1 Standard.
• IP23S protection rating with potted PC boards for
enhanced ruggedness/reliability.
• Modular construction for easy servicing.
• Aluminum Chassis and Wraparound
• 10 Ft. Power Cord included.
OPERATION
B-6 B-6
V350-PRO
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Auxiliary Power
• 115VAC, 42VAC and 24VAC power is available
from the two 14-pin amphenols on the rear of the
unit. (K1728-2 Construction model of the Invertec
V350-Pro does not have the amphenols) These
supplies are intended to supply power for auxiliary
equipment like wire feeders and the TIG Module.
• 115VAC supply is rated at 2 amps and is protected
by a 2.5 amp breaker located by the amphenol.
• 42 VAC supply is rated at 5.5 amps and is protected by a 6 amp breaker located by the amphenol.
• 24 VAC supply is rated at 5.5 amps and is protected by a 6 amp breaker located by the amphenol.
Limitations
• The V350-Pro is not recommended for processes
other than those listed.
• The V350-Pro can only be used with the recommended equipment and options.
Recommended Processes
Properly equipped, the Invertec V350-Pro supports
GMAW, FCAW, SMAW, GTAW and CAC-A
processes for a variety of materials, including mild
steel, stainless steel, cored wires, and aluminum.
C-1 C-1
V350-PRO
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TABLE OF CONTENTS
- ACCESSORIES SECTION -
Accessories...........................................................................................................................Section C
Connection of Lincoln Electric Wire Feeders..............................................................C-2 Thru C-9
V350-PRO/LN-25 with Optional 6 Pin K441-1 Remote.......................................................C-2
V350-PRO/LN-25 with Optional 6 Pin K857 Remote..........................................................C-3
LN-25 with K431 Remote Option.........................................................................................C-4
V350-PRO/LN-25 with K867 Adapter..................................................................................C-5
V350-PRO/LN-7 with K480 Control Cable ..........................................................................C-6
V350-PRO/LN-7 with K867 Adapter....................................................................................C-7
V350-PRO/LN-742...............................................................................................................C-8
V350-PRO/LN-10 with K1505 Control Cable ......................................................................C-9
Cobramatic & Tig......................................................................................................................C-10
Options Accessories.................................................................................................................C-10
CONNECTION OF LINCOLN ELECTRIC WIRE FEEDERS
CONNECTION OF THE LN-25 TO THE
V350-PRO “ACROSS THE ARC” WITH
OPTIONAL 6 PIN K441-1 REMOTE CONTROL.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
3. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
4. Set the voltmeter switch to the electrode polarity
chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Set “WELD TERMINALS SELECT” to the “ON”
position.
If you are using an LN-25 without an internal contactor, the electrode will be “HOT” when the V350PRO is energized.
8. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
CAUTION
ACCESSORIES
C-2 C-2
V350-PRO
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Figure C.1 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM
NOTE: Illustation shows electrode connected for negative polarity.
6 pin
Amphenol
Optional K444-1
Remote Control
LN-25
+ -
Wire Feeder
Work Clip Lead
To Work
To Work
Electrode Cable
CONNECTION OF THE LN-25 TO THE
V350-PRO “ACROSS THE ARC” WITH
OPTIONAL 6 PIN K857 REMOTE CONTROL.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
3. Connect the K857 remote control to the 6-pin
amphenol on the V350-PRO.
4. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
5. Set the voltmeter switch to the electrode polarity
chosen.
6. Set “CONTROL SELECT” to “REMOTE”.
7. Set the “MODE” to the “CV-WIRE” position.
8. Set “WELD TERMINALS SELECT” to the “ON”
position.
If you are using an LN-25 without an internal con-
tactor, the electrode will be “HOT” when the V350PRO is energized.
9. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
ACCESSORIES
C-3 C-3
V350-PRO
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CAUTION
NOTE: Illustration shows electrode connected for negative polarity.
Figure C.2 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM WITH K857
REMOTE CONTROL
K857
6 pin
Amphenol
Remote Control
LN-25
+ -
Wire Feeder
To Work
Electrode Cable
Work Clip Lead
To Work
ACCESSORIES
C-4 C-4
V350-PRO
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CONNECTION OF THE LN-25 WITH K431
REMOTE OPTION TO THE V350-PRO.
NOTE: AN LN-25 CAN ONLY BE USED WITH AFACTORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal. Welding cable
must be sized for current and duty cycle of the
application.
3. Attach the single lead from the LN-25 control box
to the work using the spring clip on the end of the
lead. This is only a control lead - it carries no
welding current.
4. Set the voltmeter switch to the electrode polarity
chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Set “WELD TERMINALS SELECT” to the
“REMOTE” position.
8. Set the “ARC CONTROL” to the “O” position and
then adjust to suit.
9. Connect the K432 remote control cable to the LN-
25.
10. Connect the K876 adapter to the K432 and to the
24/42VAC 14-pin amphenol located at the rear of
the V350-PRO.
11. Adjust the wire feed speed and voltage at the LN-
25.
NOTE: See Figure C.4 for connection Using K867
adapter.
NOTE: Illustration shows electrode connected for positive polarity.
Figure C.3 LN-25 with K431 Remote Option to the V350-PRO
ELECTRODE CABLE
TO LN-25
TO
WORK
14 PIN (24/42VAC)
AMPHENOL
6 PIN AMPHENOL
-
+
INVERTEC
POWER SOURCE
K876 ADAPTER
K432 REMOTE
CONTROL CABLE
LN-25 WITH
K431 OPTION
ACCESSORIES
C-5 C-5
V350-PRO
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CONNECTION OF THE K867 ADAPTER
FOR USE WITH LN-25 WITH K431
OPTION/V350-PRO.
1. Insulate each unused lead individually.
2. Remove 6 pin plug from K432 cable in order to
connect K867 adapter.
3. Label each lead (A thru F) as they are removed
from the 6 pin plug.
4. Splice leads and insulate.
Figure C.4 Connection of LN-25 to V350-PRO using K867 adapter.
ELECTRODE CABLE
TO LN-25
TO
WORK
-
+
INVERTEC
POWER SOURCE
14 PIN
(24/42VAC)
AMPHENOL
K867 ADAPTER
21
82
81
42
41
GND
31
32
2
4
SPARE
75
76
1
E
F
D
A
B
C77
4
LN-25 WITH
K431 OPTION
K432 REMOTE
CONTROL CABLE
ACCESSORIES
C-6 C-6
V350-PRO
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CONNECTION OF THE LN-7 TO THE V350PRO USING K480 CONTROL CABLE (SEE
FIGURE C.5)
NOTE: AN LN-7 CAN ONLY BE USED WITH A FACTORY OR “CE” VERSION OF THE V350-PRO. IF
YOUR LN-7 COMES EQUIPPED WITH A K291 OR
K404 INPUT CABLE, REFER TO THE CONNECTION
OF THE LN-7 USING K867 UNIVERSAL ADAPTER.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable from the K480 control
cable to the “+” terminal of the welder and to the
LN-7 wire feeder. Connect the work cable to the
“-” terminal of the welder.
NOTE: Figure C.5 shows the electrode connected
for positive polarity. To change polarity, shut the
welder off and reverse the electrode and work
cables at the output terminals.
NOTE: Welding cable must be sized for current
and duty cycle of application.
3. Connect the input cable from the K480 control
cable to the (115VAC) 14 pin amphenol on the
V350-PRO and the input cable plug on the LN-7.
4. Set the “VOLTMETER” switch to “+” or “-”
depending on the polarity chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Place the “WELD TERMINALS SELECT” in the
“REMOTE” position.
8. Adjust wire feed speed at the LN-7 and adjust the
welding voltage with the optional remote control if
used.
9. Set the “ARC” control at “0” initially and adjust to
suit.
Figure C.5 V350-PRO/LN-7 with K480 Control Cable Connection Diagram
TO LN-7 INPUT
14 PIN
AMPHENOL
(115VAC)
AT REAR OF
MACHINE
- +
6 PIN
AMPHENOL
TO WORK
CABLE PLUG
OPTIONAL K857
REMOTE CONTROL
K480 CONTROL CABLE
ELECTRODE CABLE
TO WIRE FEED UNIT
ACCESSORIES
C-7 C-7
V350-PRO
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CONNECTION OF THE K867 ADAPTER
FOR USE WITH THE K291 OR K404 INPUT
CABLES AND LN-7.
1. Insulate each unused lead individually.
2. Splice leads and insulate.
Figure C.6 Connection of LN-7 to V350-PRO using K867 adapter.
SPARE
SPARE
82
ELECTRODE CABLE
ELECTRODE CABLE
TO LN-7
TO LN-7
TO
TO
WORK
WORK
-
-
+
+
INVERTEC
INVERTEC
POWER SOURCE
POWER SOURCE
14 PIN
14 PIN(115VAC)
AMPHENOL
AMPHENOL
K867 UNIVERSAL
K867 UNIVERSAL
ADAPTER PLUG
ADAPTER PLUG
82
81
81
42
42
41
41
31
31
32
32
2
2
4
4
21
21
GND
GND
75
75
76
76
77
77
1
31
31
32
32
2
2
4
4
21
21
GND
GND
GREEN
GREEN
75
75
76
76
77
77
2
K291 OR K404
K291 OR K404
INPUT CABLE
INPUT CABLE
LN-7
LN-7
CONTROL
CONTROL
BOX
BOX
K775 OPTIONAL
K775 OPTIONAL
REMOTE CONTROL
REMOTE CONTROL
C-8 C-8
V350-PRO
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ACCESSORIES
CONNECTION OF THE LN-742 TO THE
V350-PRO (SEE FIGURE C.7)
NOTE: AN LN-7 CAN ONLY BE USED WITH A FACTORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable from the LN-742 to
the “+” terminal of the welder. Connect the work
cable to the “-” terminal of the welder.
NOTE: Figure C.7 shows the electrode connected
for positive polarity. To change polarity, shut the
welder off and reverse the electrode and work
cables at the output terminals.
NOTE: Welding cable must be sized for current
and duty cycle of application.
3. Connect the K591 control cable to the 24/42VAC
14 pin amphenol on the back of the V350-PRO
and the input cable plug on the LN-742.
4. Set the “VOLTMETER” switch to “+” or “-”
depending on the polarity chosen.
5. Set the “MODE” to the “CV-WIRE” position..
6. Set “CONTROL SELECT” to “LOCAL”.
7. Place the “WELD TERMINALS SELECT” in the
“REMOTE” position.
8. Adjust wire feed speed at the LN-742.
9. Set the “ARC” control at “0” initially and adjust to
suit.
Figure C.7 V350-PRO/LN-742 Connection Diagram
14 PIN
AMPHENOL
(24/42VAC)
AT REAR OF
MACHINE
+ -
TO LN-742 INPUT
CABLE PLUG
K591 CONTROL CABLE
ELECTRODE CABLE
TO WIRE FEED UNIT
TO WORK
CONNECTION OF THE LN-10 TO THE
V350-
PRO USING THE K1505 CONTROL CABLE.
NOTE: AN LN-10 CAN ONLY BE USED WITH AFACTORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the K1505 control cable from the LN-10
to the Invertec 24/42VAC 14 pin amphenol connecter on the rear of the V350-PRO.
3. Connect the electrode cable to the output terminal
of polarity required by the electrode. Connect the
work lead to the other terminal.
4. Set the meter polarity switch on the front of the
V350-PRO to coincide with wire feeder polarity
used.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position..
7. Set the “WELD TERMINALS SELECT” to the
“REMOTE” position.
8. Set the “ARC CONTROL” to the “0” position and
then adjust to suit.
9. Set wire feed speed and voltage at the LN-10.
NOTE: The voltage set point displayed on the
V350-PRO should be ignored when operating in
the remote control mode with the LN-10.
10. See the LN-10 manual for details on accessing
the control DIP switch.
11. The control DIP switch inside the LN-10 should be
set as shown below for operation with the V350Pro.
ACCESSORIES
C-9 C-9
V350-PRO
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Figure C.8 LN-10 V350-PRO
14 PIN
AMPHENOL
(24/42VAC)
AT REAR OF
MACHINE
+ -
Power Sources
ON
S1
2
1
3
4
6
5
7
S1
8
TO LN-10
K1505
TO WORK
ELECTRODE CABLE
TO LN-10
ACCESSORIES
C-10 C-10
V350-PRO
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OPTIONS / ACCESSORIES
Construction Version – K1728-2
• All welding modes for this model run with local output control and weld terminals ON (e.g. Stick, TIG,
LN25 off the arc).
K930-1 TIG Module
K428,K446, K449 LN-25(Off the Arc)
Factory Version – K1728-1
• The factory model is the construction model with
the addition of the Wire Feeder/Remote Adapter.
• In this form, the V350-Pro provides the hardware to
power and connect to 24, 42 or 115 VAC wire feeders.
K857 Remote Output Control
K814 Arc Start Switch
K812 Hand Operated Amptrol
K870 Foot Operated Amptrol
K930-1 TIG Module
K428, K446, K449 LN-25
K617 (-1 or -2) K618 (-1 or -2) LN-742
K440 (-1), K567-1 LN-7 GMA
K1559-1, K1564-1 LN-10
K1499-1, K1521-1 DH-10
"CE" Version – K1728-3
• The "CE" version is the Factory version with the
addition of power line filtering allowing the machine
to comply with the European and Australian EMC
emission requirements.
Field Installed Options/Accessories
Two versions of the V350-Pro are available from the
factory for both the CE and ROW versions.
Options for K1728-1 Factory and K1728-3 "CE"
V350’s
• TIG Gas Control Kit – K1762-1
• Advance Process Panel – K1763-1
Options for all models of V350-PRO
• Undercarriage – K1764-1
Cobramatic Connection Instructions
A Cobramatic can only be used with a Factory or
"CE" version of the V350
1. Turn the Invertec power switch "off"
2. Connect the control cable from the Cobramatic to
the 24/42 VAC 14-pin wire feeder amphenol on
the rear of the Invertec.
3. Connect the electrode cable to the output terminal
of the polarity required by electrode. Connect the
work lead to the other terminal.
4. Set the meter polarity switch on the front of the
Invertec to coincide with wire feeder polarity used.
5. If a remote control such as K857 is to be used
with the Cobramatic, the remote can be connected
directly to the 6pin amphenol on the front of the
Invertec or use a K864 adapter to connect the
cobramatic and the remote to the 24/42VAC 14pin wire feeder amphenol connector on the rear of
the Invertec.
TIG Module K930-2
The TIG Module connects to the V350-Pro Factory or
CE versions with a K936-1 (9-14 pin) control cable.
Connect the K936-1 to the 115VAC Wire Feeder
Amphenol on the rear of the V350-Pro.
The TIG Module can also be used with the V350
Construction version. AK936-4 control cable is
required to supply 115VAC to the TIG Module from an
external 115VAC supply.
General Instructions for Connection of Wire
Feeders to V350-Pro
Wire feeders other than LN-7 and LN-25 may be used
provided that the auxiliary power supply capacity of
the V350-Pro is not exceeded. K867 universal
adapter plug is required. See connection diagram
S19406 and S19386 at the back of this manual for
more information.
Remote Control of Invertec
Remote Control K857, Hand Amptrol K963 and Foot
Amptrol K870.
Section D-1 Section D-1
V350-PRO
TABLE OF CONTENTS
-MAINTENANCE-
Maintenance .........................................................................................................................Section D
Input Filter Capacitor Discharge Procedure ...............................................................................D-2
Routine Maintenance ..................................................................................................................D-2
Periodic Maintenance.................................................................................................................D-3
Thermal Protection .....................................................................................................................D-3
Major Component Locations .....................................................................................................D-4
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MAINTENANCE
D-2 D-2
V350-PRO
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FIGURE D.1 — LOCATION OF INPUT FILTER
CAPACITOR TERMINALS
Have qualified personnel do the maintenance
work. Always use the greatest care when
working near moving parts.
Do not put your hands near the cooling blower
fan. If a problem cannot be corrected by
following the instructions, take the machine to
the nearest Lincoln Field Service Shop.
-----------------------------------------------------------------------
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and
ground
• Always wear dry insulating gloves.
------------------------------------------------------------------------
EXPLODING PARTS can cause
injury.
•
Failed parts can explode or cause other
parts to explode when power is applied.
•
Always wear a face shield and long sleeves when ser-
vicing.
------------------------------------------------------------------------
See additional warning information
throughout this operators manual.
------------------------------------------------------------
WARNING
INPUT FILTER CAPACITOR
DISCHARGE PROCEDURE
1. Remove the input power to the V350-PRO.
2. Using the 5/16” wrench remove the screws f rom
the case wraparound cover.
3. Be careful not to make contact with the capacitor
terminals located at the top and bottom of the
switch board.
4. Obtain a high resistance and high wattage resistor (25-1000 ohms and 25 watts minimum). This
resistor is not with the machine. NEVER USE A
SHORTING STRAP FOR THIS PROCEDURE.
5. Locate the eight capacitor terminals shown in figure D.1.
6. Using electrically insulated gloves and pliers, hold
the body of the resistor with the pliers and connect
the resistor leads across the two capacitor terminals. Hold the resistor in place for 10 seconds.
DO NOT TOUCH CAPACITOR TERMINALS WITH
YOUR BARE HANDS.
7. Repeat the discharge procedure for the other
three capacitors.
8. Check the voltage across the terminals of all
capacitors with a DC voltmeter. Polarity of the
capacitor terminals is marked on the PC board
above the terminals. Voltage should be zero. If
any voltage remains, repeat this capacitor discharge procedure.
ROUTINE MAINTENANCE
1. Every 6 months or so the machine should be
cleaned with a low pressure airstream. Keeping the
machine clean will result in cooler operation and
higher reliability. Be sure to clean these areas:
• All printed circuit boards
• Power switch
• Main transformer
• Input rectifier
• Auxiliary Transformer
• Reconnect Switch Area
2. Examine the sheet metal case for dents or breakage.
Repair the case as required. Keep the case in good condition to insure that high voltage parts are protected and
correct spacings are maintained. All external sheet metal
screws must be in place to insure case strength and electrical ground continuity.
EIGHT
CAPACITOR
TERMINALS
- +
- +
INSULATED
PLIERS
- +
POWER
RESISTOR
- +
INSULATED
GLOVES
OVERLOAD PROTECTION
The machine is electrically protected from producing
high output currents. Should the output current exceed
430A, an electronic protection circuit will reduce the
current to approximately 100A. The machine will continue to produce this low current until the protection circuit is reset. Reset occurs when the output load is
removed.
THERMAL PROTECTION
Thermostats protect the machine from excessive operating temperatures. Excessive temperatures may be
caused by a lack of cooling air or operating the
machine beyond the duty cycle and output rating. If
excessive operating temperature should occur, the
thermostat will prevent output voltage or current. The
meter will remain energized during this time.
Thermostats are self-resetting once the machine cools
sufficiently. If the thermostat shutdown was caused by
excessive output or duty cycle and the fan is operating
normally, the Power Switch may be left on and the
reset should occur within a 15 minute period.
MAINTENANCE
D-3 D-3
V350-PRO
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W
A
R
N
IN
G
R
E
M
O
T
E
P
O
W
E
R
O
F
F
O
N
A
AMPS
A
V
VOLTS
WELD TERMINALS
SELECT
OUTPUT
LINCOLN
ELECTRIC
INVERTEC V350-PRO
WARNING
WARNING
AVISO DE
PRECAUCION
ATTENTION
!
!
!
!
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6
4
5
3
2
1
MAINTENANCE
D-4 D-4
V350-PRO
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FIGURE D.2 – MAJOR COMPONENT LOCATIONS
1. Center Panel
2. Base Assembly
3. Control Box Assembly
4. Case Back
5. Case Front
6. Case Wraparound
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