Lincoln Electric INVERTEC IM732-B User manual

INVERTEC®V350-PRO (CE)
OPERATOR’S MANUAL
For use with machines Code; 10875, 11483,11562
IM732-B
June, 2009
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 thought
ful 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.
WARNING
REMOTEPOWER
OFF
ON
AAMPS
A
VVOLTS
WELDTERMINALS
SELECT
OUTPUT
LINCOLN
ELECTRIC
INVERTEC V350-PRO
WARNING
WARNINGAVISO DE
PRECAUCION
ATTENTION
!!
!!
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• Sales and Service through Subsidiaries and Distributors Worldwide •
leveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and utting Products •
ISO/IEC 60974-1
IP23S
Copyright © Lincoln Global Inc.

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 vaporiz-
ing 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.
i
SAFETY
i
ARC WE DING CAN BE HAZARDOUS. PROTECT YOURSE F AND OTHERS FROM POSSIB E SERIOUS INJURY OR DEATH.
KEEP CHI DREN AWAY. PACEMAKER WEARERS SHOU D CONSU T 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 & utting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box
351040, Miami, Florida 33135 or SA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available
from the Lincoln Electric ompany, 22801 St. lair Avenue, leveland, Ohio 44117-1199.
BE SURE THAT A INSTA ATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ON Y BY QUA IFIED INDIVIDUA S.
WARNING
Mar ‘95
E ECTRIC AND
MAGNETIC FIE DS
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. onnect 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.
CA IFORNIA PROPOSITION 65 WARNINGS
Diesel engine exhaust and some of its constituents
are known to the State of alifornia to cause can-
cer, birth defects, and other reproductive harm.
The engine exhaust from this product contains
chemicals known to the State of alifornia to cause
cancer, birth defects, or other reproductive harm.
The Above For Diesel Engines The Above For Gasoline Engines

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.
ELEC RIC 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 within applicable OSHA PEL and
ACGIH LV limits using local exhaust or mechanical
ventilation. In confined spaces or in some circum-
stances, outdoors, a respirator may be required.
Additional precautions are also required when welding
on galvanized steel.
5. b. The operation of welding fume control equipment is affected
by various factors including proper use and positioning of
the equipment, maintenance of the equipment and the spe-
cific welding procedure and application involved. Worker
exposure level should be checked upon installation and
periodically thereafter to be certain it is within applicable
OSHA PE and ACGIH T V limits.
5.c. 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 prod-
ucts.
5.d. 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.e. 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.f. Also see item 1.b.
Jan ‘09

iii
SAFETY
iii
FOR ELEC RICALLY
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.
WELDING and CU ING
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 cir-
cuits. This can create fire hazards or overheat lifting chains
or cables until they fail.
6.h. Also see item 1.c.
6.I. Read and follow NFPA 51B “ Standard for Fire Prevention
During Welding, Cutting and Other Hot Work”, available
from NFPA,1 Batterymarch Park, PO box 9101, Quincy, Ma
022690-9101.
6.j. Do not use a welding power source for pipe thawing.
Jan ‘09
Refer to http://www.lincolnelectric.com/safety for additional safety information.

iv
SAFETY
iv
Mar. ‘93
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 suiv-
antes:
Sûreté Pour Soudage A ’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 ray-
onnement 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, pan-
talons 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 lev-
age, câbles de grue, ou autres circuits. ela 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.
eci 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 “ ode for safety in welding and cutting” SA
Standard W 117.2-1974.
PRÉCAUTIONS DE SÛRETÉ POUR
ES 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 debranch-
er à l’interrupteur à la boite de fusibles.
4. Garder tous les couvercles et dispositifs de sûreté à leur
place.

v
SAFETY
v
INVERTEC® V350-PRO (CE)
Electromagnetic Compatibility (EMC)
Conformance
Products displaying the CE mark are in conformity with European Community Council Directive of 3 May
1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility
(89/336/EEC). It was manufactured in conformity with a national standard that implements a harmonized
standard: EN 60974-10 Electromagnetic Compatibility (EMC) Product Standard for Arc Welding Equipment.
It is for use with other incoln Electric equipment. It is designed for industrial and professional use.
Introduction
All electrical equipment generates small amounts of electromagnetic emission. Electrical emission may be
transmitted through power lines or radiated through space, similar to a radio transmitter. When emissions
are received by other equipment, electrical interference may result. Electrical emissions may affect many
kinds of electrical equipment; other nearby welding equipment, radio and TV reception, numerical controlled
machines, telephone systems, computers, etc. Be aware that interference may result and extra precautions
may be required when a welding power source is used in a domestic establishment.
Installation and Use
The user is responsible for installing and using the welding equipment according to the manufacturer’s
instructions. If electromagnetic disturbances are detected then it shall be the responsibility of the user of the
welding equipment to resolve the situation with the technical assistance of the manufacturer. In some cases
this remedial action may be as simple as earthing (grounding) the welding circuit, see Note. In other cases it
could involve construction of an electromagnetic screen enclosing the power source and the work complete
with associated input filters. In all cases electromagnetic disturbances must be reduced to the point where
they are no longer troublesome.
Note: The welding circuit may or may not be earthed for safety reasons according to national codes.
Changing the earthing arrangements should only be authorized by a person who is compe-
tent to access whether the changes will increase the risk of injury, e.g., by allowing parallel
welding current return paths which may damage the earth circuits of other equipment.
Assessment of Area
Before installing welding equipment the user shall make an assessment of potential electromagnetic prob-
lems in the surrounding area. The following shall be taken into account:
a) other supply cables, control cables, signaling and telephone cables; above, below and adjacent to the
welding equipment;
b) radio and television transmitters and receivers;
c) computer and other control equipment;
d) safety critical equipment, e.g., guarding of industrial equipment;
e) the health of the people around, e.g., the use of pacemakers and hearing aids;
f) equipment used for calibration or measurement
g) the immunity of other equipment in the environment. The user shall ensure that other equipment being
used in the environment is compatible. This may require additional protection measures;
h) the time of day that welding or other activities are to be carried out.
10093 3-1-96H

vi
SAFETY
vi
INVERTEC® V350-PRO (CE)
Electromagnetic Compatibility (EMC)
The size of the surrounding area to be considered will depend on the structure of the building and other
activities that are taking place. The surrounding area may extend beyond the boundaries of the premises.
Methods of Reducing Emissions
Mains Supply
Welding equipment should be connected to the mains supply according to the manufacturer’s recommenda-
tions. If interference occurs, it may be necessary to take additional precautions such as filtering of the mains
supply. Consideration should be given to shielding the supply cable of permanently installed welding equip-
ment, in metallic conduit or equivalent. Shielding should be electrically continuous throughout its length. The
shielding should be connected to the welding power source so that good electrical contact is maintained
between the conduit and the welding power source enclosure.
Maintenance of the Welding Equipment
The welding equipment should be routinely maintained according to the manufacturer’s recommendations.
All access and service doors and covers should be closed and properly fastened when the welding equip-
ment is in operation. The welding equipment should not be modified in any way except for those changes
and adjustments covered in the manufacturers instructions. In particular, the spark gaps of arc striking and
stabilizing devices should be adjusted and maintained according to the manufacturer’s recommendations.
Welding Cables
The welding cables should be kept as short as possible and should be positioned close together, running at
or close to floor level.
Equipotential Bonding
Bonding of all metallic components in the welding installation and adjacent to it should be considered.
However, metallic components bonded to the work piece will increase the risk that the operator could
receive a shock by touching these metallic components and the electrode at the same time. The operator
should be insulated from all such bonded metallic components.
Earthing of the Workpiece
Where the workpiece is not bonded to earth for electrical safety, not connected to earth because of its size
and position, e.g., ships hull or building steelwork, a connection bonding the workpiece to earth may reduce
emissions in some, but not all instances. Care should be taken to prevent the earthing of the workpiece
increasing the risk of injury to users, or damage to other electrical equipment. Where necessary, the connec-
tion of the workpiece to earth should be made by a direct connection to the workpiece, but in some countries
where direct connection is not permitted, the bonding should be achieved by suitable capacitance, selected
according to national regulations.
Screening and Shielding
Selective screening and shielding of other cables and equipment in the surrounding area may alleviate prob-
lems of interference. Screening of the entire welding installation may be considered for special applications.
1
_________________________
1Portions of the preceding text are contained in EN 60974-10: “Electromagnetic Compatibility (EMC) prod-
uct standard for arc welding equipment.”
10093 3-1-96H

viivii
TThhaannkk YYoouufor selecting a QUA ITY product by Lincoln Electric. We want you
to take pride in operating this Lincoln Electric ompany product
••• as much pride as we have in bringing this product to you!
Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it
handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:
WARNING
This statement appears where the information must be followed exactly to avoid serious personal injury or loss of life.
This statement appears where the information must be followed to avoid minor personal injury or damage to this equipment.
CAUTION
Please Examine Carton and Equipment For Damage Immediately
When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. onsequently, laims
for material damaged in shipment must be made by the purchaser against the transportation company at the
time the shipment is received.
Please record your equipment identification information below for future reference. This information can be
found on your machine nameplate.
Product _________________________________________________________________________________
Model Number ___________________________________________________________________________
ode Number or Date ode_________________________________________________________________
Serial Number____________________________________________________________________________
Date Purchased___________________________________________________________________________
Where Purchased_________________________________________________________________________
Whenever you request replacement parts or information on this equipment, always supply the information you
have recorded above. The code number is especially important when identifying the correct replacement parts.
On- ine Product Registration
- Register your machine with Lincoln Electric either via fax or over the Internet.
• For faxing: omplete the form on the back of the warranty statement included in the literature packet
accompanying this machine and fax the form per the instructions printed on it.
• For On-Line Registration: Go to our
WEB SITE at www.lincolnelectric.com. hoose “Quick Links” and then
“Product Registration”. Please complete the form and submit your registration.
CUSTOMER ASSISTANCE PO ICY
The business of The Lincoln Electric ompany is manufacturing and selling high quality welding equipment, consumables, and cutting equip-
ment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln
Electric for advice or information about their use of our products. We respond to our customers based on the best information in our posses-
sion at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such infor-
mation or advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customer’s particular purpose,
with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or
correcting any such information or advice once it has been given, nor does the provision of information or advice create, expand or alter any
warranty with respect to the sale of our products.
Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control
of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in
applying these types of fabrication methods and service requirements.
Subject to hange – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com
for any updated information.

viii
viii TAB E OF CONTENTS Page
Installation.......................................................................................................Section A
Technical Specifications........................................................................................A-1
Safety Precautions..........................................................................................A-2
Select Suitable Location..................................................................................A-2
Stacking ..........................................................................................................A-2
Tilting...............................................................................................................A-2
Input and Grounding onnections ..................................................................A-2
Power ord onnection..................................................................................A-2
onnection of Wire Feeders to V350-PRO ( E).............................................A-2
Remote ontrol of Invertec®...........................................................................A-3
Undercarriage Mountings................................................................................A-3
Parallel Operations..........................................................................................A-4
________________________________________________________________________
Operation.........................................................................................................Section B
Additional Safety Precautions ...............................................................................B-1
General Description and Duty ycle......................................................................B-1
Operational Features and ontrols.........................................................B-1 Thru B-3
Remote ontrol of the Output ontrol and Weld Terminals..................................B-3
Design Features and Advantages .........................................................................B-4
Auxiliary Power......................................................................................................B-4
Limitations..............................................................................................................B-4
Recommended Processes ....................................................................................B-4
________________________________________________________________________
Accessories.....................................................................................................Section C
General Options / Accessories.............................................................................. -1
“ E” Version........................................................................................................................ -1
Field Installed Options/Accessories....................................................................... -1
Ouick Disconnect Plugs......................................................................................... -1
________________________________________________________________________
Maintenance ....................................................................................................Section D
Safety Precautions ................................................................................................D-1
APA ITOR DIS HARGE PRO EDURE..........................................................................D-1
VISUAL INSPE TION...................................................................................................D-1
ROUTINE MAINTENAN E ............................................................................................D-1
PERIODI MAINTENAN E ...........................................................................................D-1
________________________________________________________________________
Section E ..............................................................................................Troubleshooting
Safety Precautions.................................................................................................E-1
How to Use Troubleshooting Guide.......................................................................E-1
Troubleshooting Guide ...........................................................................E-2 Thru E-3
Fault odes ...........................................................................................................E-4
Displays.................................................................................................................E-5
________________________________________________________________________
Connection , Wiring Diagrams and Dimension Prints .................................Section F
________________________________________________________________________
Parts ist .....................................................................................................P-401 Series
________________________________________________________________________

INVERTEC® V350-PRO (CE)
A-1
INSTA ATION
A-1
TECHNICA SPECIFICATIONS - INVERTEC®V350-PRO (CE)
INPUT AT RATED OUTPUT
OUTPUT CAB ES, CONNECTIONS AND IMITATIONS
Product Ordering Input AC Rated DC Output Output Open
Name Information Voltage Amps/Volts/Duty Cycle Range Circuit
5500//6600 HHzz (continuous)
335500AA // 3344VV // 6600%%
IInnvveerrtteecc®®220000222200// 33 PPhhaassee
VV335500KK1177228888 338800440000// 332200AA // 3333VV // 6600%% AAMMPPSS8800 VVDD
PPRROO““CCEE”” 441155444400//11 PPhhaassee 55442255
6600//5500 HHzz
227755AA // 3311VV //110000%%
11 PPhhaassee
330000AA // 3322VV // 110000%%
33 PPhhaassee
Select the output cable size based upon the following chart.
able sizes for ombined Length of Electrode and Work able ( opper) 75 rated:
DUTY CYC E CURRENT ENGTH UP 61m (200 FT) 61-76m (200-250 FT)
100% 275 1/0 1/0
60% 350 1/0 2/0
Voltage
200
220
380
400
415
440
Phases
1
1
1
1
1
1
Input Amps
275 Amps @
31Volts(100%)
Not
Recommended
64
44
40
38
35
Input Amps
320 Amps @
33Volts(60%)
Not
Recommended
82
55
50
48
45
Line ord
AWG
---
4
6
8
8
8
Maximum
Fuse size
---
125A
80A
80A
80A
80A
RECOMMENDED INPUT WIRE AND FUSE SIZES FOR MAXIMUM RATED OUTPUT
Recommended Fuse Sizes Base On The U.S. National Electrical ode And Maximum Machine Outputs
Note 1. Not rated is indicated by 4-x’s in the box on the rating plate.
Note 2. When operating on these inputs, the line cord should be changed to an input conductor of 6 AWG or larger.
Notes
Note 1
Note 2
Note 2
* Overall Length Including Handle, 27.8” (706mm)
Height Width Depth Weight with Cord
14.8”(373mm) 12.5”(317mm) 27.8” *(706mm*) 86.5 Lbs.(37.4 Kg)
PHYSICA DIMENSIONS
TEMPERATURE RANGES
STORAGE TEMPERATURE RANGE
-40° to +40°
OPERATING TEMPERATURE RANGE
-20° to +40°
Voltage
200
220
380
400
415
440
Phases
3
3
3
3
3
3
Input Amps
300Amps @
32Volts(100%)
41
37
28
22
22
21
Input Amps
350Amps @
34Volts(60%)
48
48
28
27
26
24
Line ord
AWG
6
6
8
8
8
8
Maximum
Fuse size
80A
80A
50A
50A
50A
50A
Input 50/60 Hz Recommended
Recommended
Notes
Note 2
Note 2

A-2
INSTA ATION
A-2
SE ECT SUITAB E OCATION
The Invertec®V350-PRO ( E) will operate in harsh
environments. Even so, it is important that simple pre-
ventative measures are followed in order to assure
long life and reliable operation.
• The machine must be located where there is free cir-
culation of clean air such that air movement in the
back, out the sides and bottom will not be restricted.
• Dirt and dust that can be drawn into the machine
should be kept to a minimum. Failure to observe
these precautions can result in excessive operating
temperatures and nuisance shutdown.
• Keep machine dry. Shelter from rain and snow. Do
not place on wet ground or in puddles.
• DO NOT MOUNT OVER COMBUSTIB E SURFACES.
Where there is a combustible surface directly
under stationary or fixed electrical equipment,
that surface shall be covered with a steel plate at
least .06”(1.6mm) thick, which shall extend not
less than 5.90”(150mm) beyond the equipment on
all sides.
------------------------------------------------------------------------
STACKING
Invertec® V350-PRO ( E) cannot be stacked.
TI TING
Place the machine directly on a secure, level surface
or on a recommended undercarriage. The machine
may topple over if this procedure is not followed.
INPUT AND GROUNDING CONNECTIONS
• Only a qualified electrician should connect the
Invertec®V350-PRO ( E). Installation should be
made in accordance with the appropriate National
Electrical ode, all local codes and the information
detailed below.
• When received directly from the factory, multiple
voltage machines are internally connected for
440VA . If 440VA is the desired input, then the
machine may be connected to the power system
without any setup required inside the machine.
SAFETY PRECAUTIONS
E ECTRIC SHOCK can kill.
• TURN THE INPUT POWER OFF AT
THE DISCONNECT SWITCH BEFORE
ATTEMPTING TO CONNECT OR DIS-
CONNECT INPUT POWER INES, OUTPUT
CAB ES, OR CONTRO CAB ES.
• Only qualified personnel should perform this
installation.
• Connect the green/yellow lead of the power
cord to ground per appropriate National
Electrical Code.
----------------------------------------------------------------------
WARNING
• Initial 200VA - 415VA 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.
• Move the "A" lead to the appropriate terminal.
POWER CORD CONNECTION
A 5 meter power cord is wired into the machine.
Follow the power cord connection instructions.
• Incorrect connection may result in equipment
damage.
-----------------------------------------------------------------------
Single Phase Input
onnect green/yellow lead to ground per National
Electrical ode.
onnect blue and brown leads to power.
Wrap black lead with tape to provide 600V insulation.
Three Phase Input
onnect green/yellow lead to ground per appropriate
National Electric ode.
onnect blue, black and brown leads to power.
CONNECTIONS OF WIRE FEEDERS TO INVERTEC®
V350-PRO (CE)
N-10 Connection Instructions
• Turn the Invertec®power switch "off".
• onnect the K1505 control cable from the LN-10 to
the
14-pin MS-style connector .
• onnect the electrode cable to the output terminal
of polarity required by the electrode. onnect the
work lead to the other terminal.
• Set the meter polarity switch on the front of the
Invertec®to coincide with wire feeder polarity used.
• See the LN-10 manual for details on accessing
ontrol DIP Switch
WARNING
WARNING
REMOTE
REMOTE POWER
POWER
OFF
OFF
ON
ON
AA
AMPS
AMPS
A
A
V
V
VOLTS
VOLTS
WELDTERMINALS
WELDTERMINALS
SELECT SELECT
OUTPUT
OUTPUT
LINCOLN
LINCOLN
ELECTRIC
ELECTRIC
INVERTECV350-PRO
INVERTEC V350-PRO
WARNING
WARNING
WARNING
WARNING AVISODE
AVISO DE
PRECAUCION
PRECAUCION
ATTENTION ATTENTION
!
!
!
!
!
!
!
!
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GREEN/YELLOW
BLUE
BLACK
BROWN
INVERTEC® V350-PRO (CE)
CAUTION
CAUTION

A-3
INSTA ATION
A-3
INVERTEC® V350-PRO (CE)
N-15 Connection Instructions
• Turn the Invertec®power switch "off".
• onnect the electrode cable to the output terminal of
polarity required by electrode. (See Figures below)
• Set the meter polarity switch on the front of the Invertec®
to coincide with wire feeder polarity used.
N-25 Connection Instructions
• Turn the Invertec®power switch "off".
• onnect the electrode cable to the output terminal of
polarity required by electrode. onnect the work lead to
the other terminal.
• LN-25 with Remote ontrol options can be used with the
" E" version of the V350. The 6-Pin (K444-1) and 14-pin
(K444-2) remotes can be connected directly to the 6-pin
& 14-pin MS-style connector. The 42 Volt Remote
Voltage and Output ontrol (K624-1) Kit can be connect-
ed to the V350’s 14-pin MS-style connector using
Remote ontrol able assembly K627- [ ]. LN-25s with a
K431-1 remote kit can be connected to the V350’s 14-pin
MS-style connector using a K432 cable and K876
adapter. (See connection diagram S19899). Or the K432
cable could be modified with a K867 Universal Adapter
Plug (See connection diagram S19405) to connect it to
the V350’s 14-pin MS-style connector.
N-742 Connection Instructions
• Turn the Invertec®power switch "off"
• Either a K591 or a K593 Input cable assembly is
required to connect the LN-742 to the Invertec®.
• onnect the control cable from the LN-742 to the
14-pin MS-style connector .
• onnect the electrode cable to the output terminal
of the polarity required by electrode. onnect the
work lead to the other terminal.
• Set the meter polarity switch on the front of the
Invertec®to coincide with wire feeder polarity used.
The wire feeder will now display the welding volt-
age.
• If a remote control such as K857 is to be used with
the LN-742, the remote can be connected directly
to the
6-pin MS-style connector on the front of the
Invertec®or use a K864 adapter to connect the LN-
742 and the remote to the 14-pin MS-style connector .
Cobramatic Connection Instructions
• Turn the Invertec®power switch "off"
• onnect the control cable from the obramatic to
the
14-pin MS-style connector .
• onnect the electrode cable to the output terminal
of the polarity required by electrode. onnect the
work lead to the other terminal.
• Set the meter polarity switch on the front of the
Invertec®to coincide with wire feeder polarity
used.
• If a remote control such as K857 is to be used
with the obramatic, the remote can be connected
directly to the
6-pin MS-style connector on the front
of the Invertec®or use a K864 adapter to connect
the cobramatic and the remote to the 14-pin MS-
style connector .
CONNECTION OF WIRE FEEDERS TO V350-PRO (CE)
Wire feeders other than these listed may be used pro-
vided that the auxiliary power supply capacity of the
Invertec®is not exceeded. K867 Universal Adapter
Plug may be required. See connection diagram
S24985 on page F-4.
REMOTE CONTRO OF INVERTEC®
Remote ontrol K857, Hand Amptrol K963 and Foot
Amptrol K870.
UNDERCARRIAGE MOUNTINGS
14.79
12.44
3.44 21.60
27.82
5.50
10.00
MOUNTING HOLE LOCATIONS
M19527
13.10
1/4-20 NUT (4 PLACES)
NOTE: MOUNTING SCREWS CA
4/01
N NOT PROTRUDE MORE THAN
0.5 INCHES INSIDE THE MACHINE.
11.84
3.50
Work
Clamp
Electrode Cable
Electrode Cable
Electrode Cable
Work
Clamp
Work
Clamp
wire feeder
K1870-1
wire feeder
K1870-1
RANGER 8
SAE 400 WITH CV ADAPTER
ENGINE DRIVEN WELDERS
WITH WIRE FEED MODULE
(LOCAL MODE AND CV ADAPTER)
CV250
CV300
CV400
CC POWER SOURCE
Output Terminals
Always Hot.
Output Terminals
Always Hot.
Output Terminals
Always Hot.
Order K484 Jumper
Plug Kit.
Electrode Cable
Work
Clamp
semiautomatic
semiautomatic
semiautomatic
semiautomatic
wire feeder
K1870-1
wire feeder
K1870-1
wire feeder
K1870-1
CV655, DC400, DC600,
DC655, V350-PRO,
RANGER 9, RANGER 300 DLX
COMMANDER 300
COMMANDER 500
RANGER 2V35050
RANGER 305G
Output TerminalsOutput Terminals
Always Hot.Always Hot.
Power source contactorPower source contactor
switch must be in theswitch must be in the
"ON" position or use a"ON" position or use a
K848 Junper Plug Kit.K848 Junper Plug Kit.
ACROSS THE ARC MODEL
V350-PRO
TWIST-MATE
CONTROL CABLE MODEL
Electrode Cable

A-4
INSTA ATION
A-4
INVERTEC® V350-PRO (CE)
PARA E OPERATION
The INVERTE ® v350-pro ( E) are operable in par-
allel in 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 main-
tain the desired current. The arc control pots should
be kept identical on the two machines.

B-1
OPERATION
INVERTEC® V350-PRO (CE)
B-1
SAFETY PRECAUTIONS
E ECTRIC 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 danger-
ous.
• Keep your head out of fumes.
• Use ventilation or exhaust to remove
fumes from breathing zone.
------------------------------------------------------------------------
WE DING 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 operator’s manual.
-----------------------------------------------------------
WARNING
GENERA DESCRIPTION
PRODUCT DESCRIPTION & DUTY CYC E
The Invertec®V350-PRO ( E) offers multi mode V
and D welding and is rated at 350 amps, 34 volts
at a 60% duty cycle with 3 phase input. It is also rated
at 320 amps with single phase input. It is rated at 275
amps, 100% duty cycle.
OPERATIONA FEATURES and CONTRO S:
UPPER CONTRO PANE
1. AMPS Meter
• Prior to STI K 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 V operation, the meter displays four dash-
es indicating non-presettable 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" char-
acteristics stated above. The displays blink indicat-
ing that the machine is in the "Hold" period.
2. VO T METER
• Prior to V operation (current flow), the meter dis-
plays desired preset voltage value (+/- .5V).
• Prior to STI K or TIG operation, the meter displays
the Open ircuit 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 CONTRO
• Output control is conducted via a single turn poten-
tiometer.
• 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. WE D TERMINA S-REMOTE , ON
• Two status lights indicate the location of trigger con-
trol 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.
STI K = ON
TIG and V = ON or REMOTE depending if remote
output controls are connected to the machine.

B-2
OPERATION
B-2
5. THERMA
• 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 indicat-
ing 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. CONTRO -REMOTE , OCA
• Two status lights indicate the location of output con-
trol as pre-determined by the power sources auto-
configure system.
• The LO AL 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 ontrol configurations can be overrid-
den (switched) with the ONTROL push button.
When changed, the unit will power up in the configura-
tion 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. WE D MODE SE ECT
The Mode ontrol 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 min-
imum (0), with no additional current added at arc
start, to maximum (10), with double the preset cur-
rent or 425 amps (max of machine) added for the
first second after arc initiation.
• The Arc ontrol 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 risp 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 recom-
mended setting for Hot Start is 5 where the initial
current is equal to the preset current.
INVERTEC® V350-PRO (CE)
REMOTEREMOTE
ONON
REMOTEREMOTE
LOCALLOCAL
WELD TERMINALSWELD TERMINALS
OUTPUTOUTPUT
CONTROLCONTROL
SELECTSELECT SELECTSELECT
MPSMPS
AAOLTSOLTS
VV
1
6
52
3
4
8
7
11
10
12 9
FIGURE 1

B-3
OPERATION
B-3
• The Arc ontrol 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.
TIG GTAW: The TIG mode features continuous con-
trol 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. A setting of less than 5, the TIG lift start
mode is selected. The O V is controlled below 10v
and the short circuit "TIG touch" current is main-
tained 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 set-
tings between 0 and 5 regulate the arc initiation cur-
rent. A setting of 5 results in the most positive arc ini-
tiation. A setting of 0 reduces hot start.
• Hot Start settings between 5 and 10, select high fre-
quency assisted starting TIG mode. In this range, the
O V 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 O V.
• The Arc ontrol is not used in the TIG mode.
TIG SO ENOID OPTION
The Solenoid only operates when th V350 is in the
TIG mode. If the Weld Terminals are in “Remote” then
the solenoid will open when the arc start switch is
closed. The solenoid will close after the arc switch has
been opened and the post flow time expired.
If the Weld Terminals are turned “ON”, then the sole-
noid will open when the electrode is touch to the work.
The electrode needs to remain in contact with the
work to allow for gas coverage before attempting to
start the arc. The solenoid will close after the arc has
been broken and the post flow time expired.
CV-WIRE: The V-WIRE mode features continuous
control from 10 to 45 volts. The mode was intended
for most GMAW, F AW, and M AW applications.
• The Hot Start control is not used in the V-WIRE
mode.
• The Arc ontrol regulates pinch effect. At the mini-
mum setting (-10), minimizes pinch and results in a
soft arc. Low pinch settings are preferable for weld-
ing 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 F AW and GMAW with O2.
CV-INNERSHIE D: The V-INNERSHIELD 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 V-FLUX
ORED mode.
• The Arc ontrol regulates pinch effect. At the mini-
mum 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 self-
shielded wires work well at an Arc ontrol setting of 5.
8. HOT START and ARC CONTRO features have
different functions depending on the welding Mode
that is active. Each feature is described under the
welding mode heading. (See Item 6 for specified
Mode Operation)
OWER 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 indi-
cated by the decal. The switch does not change
the welding polarity.
12. 6-PIN MS-style connector for remote control.
REMOTE CONTRO of the OUTPUT CON-
TRO and WE D TERMINA S
The Invertec®V350-PRO ( E) has auto sensing of
remote output controls.If after connecting or removing
a remote, the Invertec® V350-PRO ( E) did not con-
figured the way you would like the local or remote
control settings can be changed by pushing the OUT-
PUT ONTROL or WELD TERMINAL button. (A user
cannot select between the 6 and 14-pin MS-style con-
nector.)
CV modes
• The remote will default to the 14-pin MS-style con-
nector remote if a remote is connected. If no remote
is connected to the 14-pin MS-style connector then
the remote will default to the 6-pin MS-style connec-
tor if a remote is connected to it.
• In all of the V modes, the WELD TERMINAL con-
trol will default to REMOTE.
INVERTEC® V350-PRO (CE)

B-4
OPERATION
B-4
TIG mode
• The remote will default to the 6-pin MS-style if a
remote control is connected to the 6-pin MS-style
and to the 14-pin MS-style connectors. If a remote is
not connected to the 6-pin MS-style connector then
the remote will default to the 14-pin MS-style con-
nector if a remote is connected.
• 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 con-
trol 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 CONTRO
• The Invertec®V350-PRO ( E)’s Output ontrol can
be controlled by either a potentiometer connected
between 77 & 75 with the wiper connected to 76 or
a 0V to 10V D supply connected between 76 & 75.
(76 needs to be positive)
• 14-pin MS-style connector lead 75 is pin G, lead 76
is pin F and lead 77 is pin E.
• 6-pin MS-style connector lead 75 is pin , 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 pro-
duce the current that has been set by the Invertec®
V350-PRO ( E)’s front panel Output ontrol.)
• Remotes of this type offered by Lincoln Electric are
the K857, K812 and K870.
Voltage Control
• The supply should be an isolated supply. (Not refer-
enced to earth ground, any auxiliary power from the
Invertec®V350-PRO ( E) 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 ( E) to minimum output for the mode that has
been selected while 10 volts supplied to 76 will set
the Invertec®V350-PRO ( E) to the maximum out-
put for the mode. (Note: In TIG mode, 10 volts sup-
plied to lead 76 would produce the current that has
been set by the Invertec®V350-PRO ( E)’s front
panel Output ontrol.)
Types of Remote WE D TERMINA Control
• The Invertec®V350-PRO ( E)’s Weld Terminals
can be controlled from each of the amphenol con-
nectors. The circuit has a nominal O V of 15VD
and requires a dry contact closure (less than 100
ohms) to activate the output of the Invertec®V350-
PRO ( E).
• 14 Pin Amphenols the Weld Terminals are controlled
from pins (lead 2) and pin D (lead 4). Pin is posi-
tive.
• 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.
AUXI IARY POWER
• 42VA and 24VA power is available from the 14-
pin MS-style connector. These supplies are intend-
ed to supply power for auxiliary equipment like wire
feeders.
• 42 VA supply is rated at 5.5 amps and is protected
by a 10 amp breaker located by the amphenol.
• 24 VA supply is rated at 5.5 amps and is protected
by a 10 amp breaker located by the amphenol.
IMITATIONS
• The V350-PRO ( E) is not recommended for
processes other than those listed.
• The V350-PRO ( E) can only be used with the rec-
ommended equipment and options.
RECOMMENDED PROCESSES
Properly equipped, the Invertec®V350-PRO ( E)
supports GMAW, F AW, SMAW, GTAW and A -
A processes for a variety of materials, including
mild steel, stainless steel, cored wires, and alu-
minum
INVERTEC® V350-PRO (CE)

C-1
ACCESSORIES
C-1
OPTIONS / ACCESSORIES
• The V350-PRO ( E) provides the hardware to power
and connect to 24 or 42 wire feeders.
K857 Remote Output ontrol
K814 Arc Start Switch
K812 Hand Operated Amptrol
K870 Foot Operated Amptrol
K428, K446, K449 LN-25
K617 (-1 or -2) K618 (-1 or -2) LN-742
K1559-1, K1564-1 LN-10
K1499-1, K1521-1 DH-10
K1587-1 obramatic
Welding Cable Connectors:
• K852-70 1/0-2/0 cable
• K852-95 2/0-3/0 cable
FIE D INSTA ED OPTIONS
• K1762-2 TIG Gas ontrol Kit
• K1764-1 Undercarriage
• K1838-1 Valet Style Undercarriage
INVERTEC® V350-PRO (CE)
QUICK DISCONNECT P UGS
A quick disconnect system is used for the welding
cable connections. The The K852-70 is designed to
accept a welding cable size of 1/0 to 2/0.
1. Remove 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.
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.
25 mm
1 in.
WELDING CABLE BOOT
TRIM
SET SCREW
BRASS PLUG
COPPER TUBE

D-1
MAINTENANCE
D-1
VISUA INSPECTION
lean interior of machine with a low pressure air
stream. Make a thorough inspection of all compo-
nents. Look for signs of overheating, broken leads or
other obvious problems. Many problems can be
uncovered with a good visual inspection.
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
• Fan (Blow air through the rear louvers)
2. Examine the sheet metal case for dents or breakage.
Repair the case as required. Keep the case in good con-
dition 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.
PERIODIC MAINTENANCE
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.
INVERTEC® V350-PRO (CE)
SAFETY PRECAUTIONS
----------------------------------------------------------------------
-E ECTRIC 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.
------------------------------------------------------------------------
EXP ODING 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 servicing.
------------------------------------------------------------------------
See additional warning information
throughout this operator’s manual and
the Engine manual as well.
-----------------------------------------------------------
WARNING
CAPACITOR DISCHARGE PROCEDURE
1. Obtain a power resistor (25 ohms, 25 watts).
2. Hold resistor body with electrically insulated glove.
DO NOT TOU H TERMINALS. onnect the resis-
tor terminals across the two studs in the position
shown. Hold in each position for 1 second. Repeat
for all four capacitors.
3. Use a D voltmeter to check that voltage is not
present across the terminals on all four capacitors.
CAPACITOR
TERMINALS
RESISTOR

E-1
TROUB ESHOOTING
E-1
INVERTEC® V350-PRO (CE)
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
ocal incoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
This Troubleshooting Guide is provided to help you
locate and repair possible machine malfunctions.
Simply follow the three-step procedure listed below.
Step 1. LOCATE PROBLEM (SYMPTOM).
Look under the column labeled “PROBLEM (SYMP-
TOMS)”. This column describes possible symptoms
that the machine may exhibit. Find the listing that
best describes the symptom that the machine is
exhibiting.
Step 2. POSSIBLE CAUSE.
The second column labeled “POSSIBLE AUSE” lists
the obvious external possibilities that may contribute
to the machine symptom.
Step 3. RECOMMENDED COURSE OF ACTION
This column provides a course of action for the
Possible ause, generally it states to contact your
local Lincoln Authorized Field Service Facility.
If you do not understand or are unable to perform the
Recommended ourse of Action safely, contact your
local Lincoln Authorized Field Service Facility.
HOW TO USE TROUB ESHOOTING GUIDE
Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician and
machine operator and will invalidate your factory warranty. For your safety and to avoid Electrical
Shock, please observe all safety notes and precautions detailed throughout this manual.
__________________________________________________________________________
WARNING