Lincoln Electric Welding System IM708 User Manual
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IM708  
™
January, 2001  
INVERTEC V350-PRO (CE)  
For use with machines Code; 10670  
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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.  
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A
AMPS  
V
VOL  
TS  
A
OUTPUT  
LINCO  
ELECLTNRIC  
WELD TERMINALS  
SELECT  
W
A
R
N
I
N
INVER  
G
TEC V350-PR  
O
O
N
IEC 974-1  
IP21S  
Date of Purchase:  
Serial Number:  
Code Number:  
Model:  
Where Purchased:  
OPERATOR’S MANUAL  
ISO 9001  
ANSI RAB  
QMS  
Designed and Manufactured Under a  
Quality Program Certified by  
ABS Quality Evaluations, Inc.  
to ISO 9001 Requirements.  
CERTIFICATE NUMBER: 30273  
Copyright © 2001 Lincoln Global Inc.  
• World's Leader in Welding and Cutting Products •  
• 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  
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ii  
ii  
SAFETY  
ARC RAYS can burn.  
ELECTRIC SHOCK can  
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.  
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.  
4.b. Use suitable clothing made from durable flame-resistant  
material to protect your skin and that of your helpers from  
the arc rays.  
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.  
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.  
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:  
FUMES AND GASES  
can be dangerous.  
5.a. Welding may produce fumes and gases  
hazardous to health. Avoid breathing these  
• Semiautomatic DC Constant Voltage (Wire) Welder.  
• DC Manual (Stick) Welder.  
fumes and gases.When welding, keep  
your head out of the fume. Use enough  
• AC Welder with Reduced Voltage Control.  
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.  
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.  
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 prod-  
ucts.  
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.  
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.  
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.  
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.  
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.  
5.e. Also see item 1.b.  
Mar ‘95  
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iii  
iii  
SAFETY  
WELDING SPARKS can  
cause fire or explosion.  
CYLINDER may explode  
if damaged.  
6.a. Remove fire hazards from the welding area.  
If this is not possible, cover them to prevent  
7.a. Use only compressed gas cylinders  
containing the correct shielding gas for the  
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.  
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.  
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.  
7.c. Cylinders should be located:  
• Away from areas where they may be struck or subjected to  
physical damage.  
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.  
• 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  
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).  
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.  
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.  
FOR ELECTRICALLY  
powered equipment.  
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.  
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.  
6.h. Also see item 1.c.  
8.c. Ground the equipment in accordance with the U.S. National  
Electrical Code and the manufacturer’s recommendations.  
Mar ‘95  
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iv  
iv  
SAFETY  
zones où l’on pique le laitier.  
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:  
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.  
Sûreté Pour Soudage A L’Arc  
1. Protegez-vous contre la secousse électrique:  
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. Cela peut provoquer  
des risques d’incendie ou d’echauffement des chaines et des  
câbles jusqu’à ce qu’ils se rompent.  
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.  
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.  
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.  
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.  
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.  
PRÉCAUTIONS DE SÛRETÉ POUR  
LES MACHINES À SOUDER À  
TRANSFORMATEUR ET À  
REDRESSEUR  
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.  
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  
c. Protéger l’autre personnel travaillant à proximité au  
soudage à l’aide d’écrans appropriés et non-inflammables.  
effectués par un électricien qualifié.  
3. Avant de faires des travaux à l’interieur de poste, la debranch-  
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.  
er à l’interrupteur à la boite de fusibles.  
4. Garder tous les couvercles et dispositifs de sûreté à leur  
place.  
5. Toujours porter des lunettes de sécurité dans la zone de  
soudage. Utiliser des lunettes avec écrans lateraux dans les  
Mar. ‘93  
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v
v
SAFETY  
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 50 199 Electromagnetic Compatibility (EMC) Product Standard for Arc Welding Equipment. It  
is for use with other Lincoln 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 constructing 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 competent to  
assess 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 problems 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.  
3-1-96H  
L10093  
V350-PRO (CE)  
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vi  
vi  
SAFETY  
ELECTROMAGNETIC COMPATIBILITY (EMC)  
The size of the surrounding area to be considered will depend on the structure of the building and other  
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 recomme  
If interference occurs, it may be necessary to take additional precautions such as filtering of the mains s  
Consideration should be given to shielding the supply cable of permanently installed welding equipment  
conduit or equivalent. Shielding should be electrically continuous throughout its length. The shielding s  
connected to the welding power source so that good electrical contact is maintained between the condu  
welding power source enclosure.  
Maintenance of the Welding Equipment  
The welding equipment should be routinely maintained according to the manufacturer s recommendatio  
access and service doors and covers should be closed and properly fastened when the welding equipm  
operation. The welding equipment should not be modified in any way except for those changes and adj  
covered in the manufacturers instructions. In particular, the spark gaps of arc striking and stabilizing de  
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, runnin  
to the floor level.  
Equipotential Bonding  
Bonding of all metallic components in the welding installation and adjacent to it should be considered. H  
metallic components bonded to the work piece will increase the risk that the operator could receive a sh  
touching these metallic components and the electrode at the same time. The operator should be insula  
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 s  
position, e.g., ships hull or building steelwork, a connection bonding the workpiece to earth may reduce  
in some, but not all instances. Care should be taken to prevent the earthing of the workpiece increasing  
of injury to users, or damage to other electrical equipment. Where necessary, the connection of the wor  
earth should be made by a direct connection to the workpiece, but in some countries where direct conn  
permitted, the bonding should be achieved by suitable capacitance, selected according to national regu  
Screening and Shielding  
Selective screening and shielding of other cables and equipment in the surrounding area may alleviate p  
1
interference. Screening of the entire welding installation may be considered for special applications.  
1
Portions of the preceding text are contained in EN50199: "Electromagnetic Compatibility (EMC) pro  
arc welding equipment."  
V350-PRO (CE)  
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vii  
vii  
for selecting a QUALITY product by Lincoln Electric. We want you  
to take pride in operating this Lincoln Electric Company product  
••• as much pride as we have in bringing this product to you!  
Thank You  
Please Examine Carton and Equipment For Damage Immediately  
When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims  
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.  
Model Name & Number _____________________________________  
Code & Serial Number _____________________________________  
Date of Purchase _____________________________________  
Whenever you request replacement parts for or information on this equipment always supply the information  
you have recorded above.  
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.  
CAUTION  
This statement appears where the information must be followed to avoid minor personal injury or damage to  
this equipment.  
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viii  
viii  
TABLE 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 Connections ..................................................................A-2  
Power Cord Connection..................................................................................A-2  
Connection of Wire Feeders to V350-PRO (CE).............................................A-2  
Remote Control of Invertec .............................................................................A-3  
Undercarriage Mountings................................................................................A-3  
Parallel Operations..........................................................................................A-4  
Ouick Disconnect Plugs ..................................................................................A-4  
Operation .........................................................................................................Section B  
Additional Safety Precautions ...............................................................................B-1  
General Description and Duty Cycle......................................................................B-1  
Operational Features and Controls.........................................................B-1 Thru B-3  
Remote Control of the Output Control and Weld Terminals ..................................B-3  
Design Features and Advantages .........................................................................B-4  
Auxiliary Power......................................................................................................B-5  
Limitations..............................................................................................................B-5  
Recommended Processes ....................................................................................B-5  
Accessories.....................................................................................................Section C  
General Options / Accessories..............................................................................C-1  
“CE” Version........................................................................................................................C-1  
Field Installed Options/Accessories.......................................................................C-1  
Maintenance ....................................................................................................Section D  
Safety Precautions ................................................................................................D-1  
CAPACITOR DISCHARGE PROCEDURE..........................................................................D-1  
VISUAL INSPECTION...................................................................................................D-1  
ROUTINE MAINTENANCE ............................................................................................D-1  
PERIODIC MAINTENANCE ...........................................................................................D-1  
Section E ..............................................................................................Troubleshooting  
Safety Precautions.................................................................................................E-1  
How to Use Troubleshooting Guide.......................................................................E-1  
Troubleshooting Guide ...........................................................................E-2 Thru E-3  
Fault Codes ...........................................................................................................E-4  
Displays .................................................................................................................E-5  
Connection , Wiring Diagrams and Dimension Prints .................................Section F  
Parts List ......................................................................................................P389 Series  
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A-1  
A-1  
INSTALLATION  
TECHNICAL SPECIFICATIONS - INVERTEC V350-PRO (CE)  
INPUT AC VOLTAGE & DC OUTPUT  
Product Ordering Input AC  
Rated DC Output  
Output  
Range  
(continuous)  
Weight  
with Cord  
Dimensions  
HxWxD  
Name Information Voltage Amps/Volts/Duty Cycle  
50/60 Hz  
350A / 34V / 60%  
14.7”x12.5”x  
27.8”*  
Invertec  
200-220/  
3 Phase  
320A / 33V / 60%  
1 Phase  
V350- K1728-3 380-400/  
AMPS  
5-425  
82.5lbs  
(37.4 kg)  
(373x318x  
706*)mm  
PRO  
60/50 Hz  
“CE”  
415-440/  
275A / 31V /100%  
1 & 3 Phase  
* Includes  
handles  
* Overall Length Including Handle, 27.8” (706mm) without handle.  
V350-PRO (CE) INPUT CURRENT (CE)  
Recommended Fuse Sizes Based On The U.S. National Electrical Code And Maximum Machine Outputs  
Input 50/60 Hz Output Recommended  
275Amps@  
Voltage  
Phases  
350Amps@  
Line Cord  
Size Fuse Size  
Notes  
31Volts(100%)  
34Volts(60%)  
AWG[IEC] SIZES  
200  
220  
380  
400  
415  
440  
3
3
3
3
3
3
35  
35  
21  
20  
19  
18  
48  
48  
28  
27  
26  
24  
6
6
8
8
8
8
80A  
80A  
50A  
50A  
50A  
50A  
Note 2  
Note 2  
Voltage  
Phases  
275Amps@  
320Amps@  
Line Cord  
Size Fuse Size  
Notes  
31Volts(100%)  
33Volts(60%)  
200  
220  
380  
400  
415  
440  
1
1
1
1
1
1
----  
64  
44  
40  
38  
35  
----  
82  
55  
50  
48  
45  
---  
4
6
8
8
-----  
Note 1  
Note 2  
Note 2  
125A  
80A  
80A  
80A  
80A  
8
1. Not rated is indicated by 4-x's in the box on the rating plate  
2. When operating on these inputs, the line cord should be changed to an input conductor of 6 AWG or larger.  
OUTPUT CABLES, CONNECTIONS AND LIMITATIONS  
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  
100%  
CURRENT  
275  
350  
LENGTH UP 61m (200 FT)  
61-76m (200-250 FT)  
1/0  
1/0  
1/0  
2/0  
60%  
V350-PRO (CE)  
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A-2  
A-2  
INSTALLATION  
BLACK  
SAFETY PRECAUTIONS  
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BLUE  
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WARNING  
ELECTRIC SHOCK can kill.  
A
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F
• 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/yellow lead of the power  
cord to ground per appropriate National  
Electrical Code.  
Single Phase Input  
Connect green/yellow lead to ground per National  
Electrical Code.  
Connect blue and brown leads to power.  
Wrap black lead with tape to provide 600V insulation.  
Three Phase Input  
Connect green/yellow lead to ground per appropriate  
National Electric Code.  
Connect blue, black and brown leads to power.  
----------------------------------------------------------------------  
SELECT SUITABLE LOCATION  
CONNECTIONS OF WIRE FEEDERS TO V350-PRO (CE)  
LN-25 Connection Instructions  
• Turn the Invertec power switch "off".  
• Connect the electrode cable to the output terminal of  
polarity required by electrode. Connect the work lead to  
the other terminal.  
• LN-25 with Remote Control options can be used with the  
"CE" version of the V350. The 6 Pin (K444-1) and 14 pin  
(K444-2) remotes can be connected directly to the 6 & 14  
pin amphenols. The 42 Volt Remote Voltage and Output  
Control (K624-1) Kit can be connected to the V350’s  
24/42 VAC amphenol using Remote Control Cable  
assembly K627- [ ]. LN-25s with a K431-1 remote kit can  
be connected to the V350’s 24/42 VAC amphenol 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 24/42 VAC amphenol.  
The Invertec V350-PRO (CE) 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.  
STACKING  
V350-PRO (CE) cannot be stacked.  
TILTING  
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.  
LN-7 Connection Instructions  
• Turn the Invertec power switch "off".  
• Connect the K480 control cable from the LN-7 to the  
115VAC 14-pin wire feeder amphenol connector on  
the rear of the Invertec.  
• Connect the electrode cable to the output terminal of  
the polarity required by electrode. Connect 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 voltage.  
• If K480 is not available, see connection diagram  
S19404 for modification of K291 or K404 LN-7 input  
cable with K867 Universal Adapter Plug.  
• If a remote control such as K857 is to be used with  
the LN-7, the remote can be connected directly to  
the 6 pin amphenol on the front of the Invertec or  
use a K864 adapter to connect the LN-7 and the  
remote to the 115VAC 14-pin amphenol connector  
on the rear of the Invertec. (See connection diagram  
S19901)  
INPUT AND GROUNDING CONNECTIONS  
• Only a qualified electrician should connect the  
Invertec V350-PRO (CE). Installation should be  
made in accordance with the appropriate National  
Electrical Code, all local codes and the information  
detailed below.  
• When received directly from the factory, multiple  
voltage machines are internally connected for  
440VAC. If 440VAC is the desired input, then the  
machine may be connected to the power system  
without any setup required inside the machine.  
• Initial 200VAC - 415VAC 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.  
V350-PRO (CE)  
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A-3  
A-3  
INSTALLATION  
TIG MODULE K930-2  
LN-10 Connection Instructions  
The TIG Module connects to the “CE” version 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 (CE).  
• Turn the Invertec power switch "off".  
• Connect the K1505 control cable from the LN-10 to  
the Invertec 24/42VAC 14-pin amphenol connector  
on the rear of the Invertec.  
• Connect the electrode cable to the output terminal  
of polarity required by the electrode. Connect 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  
Control DIP Switch  
CONNECTION OF WIRE FEEDERS TO V350-PRO (CE)  
Wire feeders other than LN-7, LN-10 and LN-25 may  
be used provided that the auxiliary power supply  
capacity of the Invertec is not exceeded. K867  
Universal Adapter Plug may be required. See con-  
nection diagram S24985 on page F-4.  
LN-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.  
• Connect the control cable from the LN-742 to the  
24/42 VAC 14-pin wire feeder amphenol on the rear  
of the Invertec.  
REMOTE CONTROL OF INVERTEC  
Remote Control K857, Hand Amptrol K963 and Foot  
Amptrol K870.  
UNDERCARRIAGE MOUNTINGS  
• Connect the electrode cable to the output terminal  
of the polarity required by electrode. Connect the  
work lead to the other terminal.  
MOUNTING HOLE LOCATIONS  
NOTE: MOUNTING SCREWS CAN NOT PROTR  
UDE MORE THAN  
CHES INSIDE THE MACHINE.  
0.5 IN  
• 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.  
3.50  
1/4-20 NUT (4 PLACES)  
5.50  
• If a remote control such as K857 is to be used with  
the LN-742, the remote can be connected directly to  
the 6pin amphenol on the front of the Invertec or use  
a K864 adapter to connect the LN-742 and the  
remote to the 24/42VAC 14-pin wire feeder amphe-  
nol connector on the rear of the Invertec.  
10.00  
8/00  
11.8  
4
M19527  
Cobramatic Connection Instructions  
• Turn the Invertec power switch "off"  
• Connect the control cable from the Cobramatic to  
the 24/42 VAC 14-pin wire feeder amphenol on the  
rear of the Invertec.  
• Connect the electrode cable to the output terminal  
of the polarity required by electrode. Connect 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 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 14-pin  
wire feeder amphenol connector on the rear of the  
Invertec.  
V350-PRO (CE)  
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A-4  
A-4  
INSTALLATION  
PARALLEL OPERATION  
The V350-PRO (CE) 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 main-  
tain 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.  
BOOT  
WELDING CABLE  
25 mm  
TRIM  
1 in.  
3. Slide the copper tube into the brass plug.  
4. Insert cable into copper tube.  
SET SCREW  
BRASS PLUG  
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.  
V350-PRO (CE)  
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B-1  
B-1  
OPERATION  
SAFETY PRECAUTIONS  
OPERATIONAL FEATURES and CONTROLS:  
UPPER CONTROL PANEL  
1. AMPS Meter  
WARNING  
ELECTRIC SHOCK can kill.  
• Do not touch electrically live parts or  
electrode with skin or wet clothing.  
• Insulate yourself from work and  
ground.  
• 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 dash-  
es indicating non-presettable AMPS.  
• Always wear dry insulating gloves.  
------------------------------------------------------------------------  
FUMES AND GASES can be danger-  
ous.  
• 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.  
• Keep your head out of fumes.  
• Use ventilation or exhaust to remove  
fumes from breathing zone.  
------------------------------------------------------------------------  
WELDING SPARKS can cause fire or  
explosion.  
2. VOLT METER  
• Keep flammable material away.  
• Do not weld on closed containers.  
• Prior to CV operation (current flow), the meter dis-  
plays 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.  
------------------------------------------------------------------------  
ARC RAYS can burn eyes and skin.  
• Wear eye, ear and body  
protection.  
• 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.  
------------------------------------------------------------  
See additional warning information at  
front of this operator’s manual.  
-----------------------------------------------------------  
3. OUTPUT CONTROL  
GENERAL DESCRIPTION  
• 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.  
PRODUCT DESCRIPTION & DUTY CYCLE  
The Invertec V350-PRO (CE) offers multi mode CV  
and CC DC 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.  
4. WELD TERMINALS-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.  
STICK = ON  
TIG and CV = ON or REMOTE depending if remote  
output controls are connected to the machine.  
V350-PRO (CE)  
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B-2  
B-2  
OPERATION  
5. THERMAL  
7. WELD MODE SELECT  
• 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.  
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 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 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.  
6. CONTROL-REMOTE , LOCAL  
• Two status lights indicate the location of output con-  
trol 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 overrid-  
den (switched) with the CONTROL 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  
CC-STICK CRISP: The Stick Crisp mode features  
continuous control from 5 to 425 amps. This mode  
was intended primarily for pipe welding applications.  
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.  
• 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.  
1
2
5
AMPS  
VOLTS  
3
6
CONTROL  
WELD TERMIINALS  
REMOTE  
LOCAL  
REMOTE  
ON  
OUTPUT  
SELECT  
SELECT  
4
m
WELD MODE  
CC-STICK SOFT  
HOT START  
ARC CONTROL  
5
0
7
6
4
-2  
+2  
CC-STICK CRISP  
TIG GTAW  
-4  
+4  
+6  
+8  
3
7
2
8
-6  
-8  
CV-WIRE  
1
9
SELECT  
CV-FLUX CORED  
0
-10  
+10  
10  
SOFT  
CRISP  
11  
12  
8
ON  
OFF  
OFF  
OFF  
9
OFF  
10  
V350-PRO (CE)  
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B-3  
B-3  
OPERATION  
• 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 pene-  
trate an open root joint. For vertical down, open root  
pipe welding applications, the recommended setting  
is between 8 and 10.  
• The Hot Start control is not used in the CV-FLUX  
CORED mode.  
• The Arc Control 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 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 6 for specified  
Mode Operation)  
• During welding, a boost circuit increases the avail-  
able voltage to minimize pop outs. The boost circuit  
is independent of the OCV and only operates when  
an arc is lit.  
LOWER CASE FRONT  
The output studs, line switch and remote connector  
are located on the lower case front.  
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.  
9. Both STUDS contain "Twist-Mate" connector  
inserts.  
• The Hot Start control selects the starting mode  
desired. A setting 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 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  
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 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 AMPENOL for remote control.  
REMOTE CONTROL of the OUTPUT CON-  
TROL and WELD TERMINALS  
The Invertec V350-PRO (CE) has auto sensing of  
remote output controls.If after connecting or removing  
a remote, the Invertec V350-PRO (CE) did not config-  
ured the way you would like the local or remote con-  
trol settings can be changed by pushing the OUTPUT  
CONTROL or WELD TERMINAL button. (A user can-  
not select between the 6 and 14 pin amphenols.)  
• The Arc Control is not used in the TIG mode.  
CV-WIRE: The CV-WIRE mode features continuous  
control from 10 to 45 volts. The mode was intended  
for most GMAW, FCAW, and MCAW applications.  
• The Hot Start control is not used in the CV-WIRE  
mode.  
CV modes  
• The Arc Control 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 FCAW and GMAW with CO2.  
• The remote will default to the 14-pin amphenol  
remote if a remote is connected to either of the 14-  
pin 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 connect-  
ed to either of the 14-pin amphenols then the  
remote will default to the 6-pin amphenol if a remote  
is connected to it.  
CV-INNERSHIELD: The CV-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.  
• If a remote control is connected or is not connect-  
ed to any of the amphenols the WELD TERMINAL  
control will default to REMOTE.  
V350-PRO (CE)  
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B-4  
TIG mode  
B-4  
OPERATION  
Types of Remote WELD TERMINAL Control  
• 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 con-  
trol will default to ON.  
• The Invertec V350-PRO (CE)’s Weld Terminals can  
be controlled from each of the amphenol connec-  
tors. 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  
(CE).  
• 14 Pin Amphenols the Weld Terminals are controlled  
from pins C (lead 2) and pin D (lead 4). Pin C 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.  
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.  
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.  
Types of Remote OUTPUT CONTROL  
• The Invertec V350-PRO (CE)’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.  
• 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 determina-  
tion of input configuration. The reconnect door is  
fastened with 1/4-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 communi-  
cation  
• Circuit Breaker Input Switch  
• F.A.N. (fan as needed). Cooling fan runs only when  
necessary  
• Thermostatically protected.  
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 (CE)’s front panel Output Control.)  
• Remotes of this type offered by Lincoln Electric are  
the K857, K812 and K870.  
• Designed to the IEC 974-1 Standard.  
• IP21S protection rating with potted PC boards for  
enhanced ruggedness/reliability.  
Voltage Control  
• The supply should be an isolated supply. (Not refer-  
enced to earth ground, any auxiliary power from the  
Invertec V350-PRO (CE) 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 (CE) to minimum output for the mode that has  
been selected while 10 volts supplied to 76 will set  
the Invertec V350-PRO (CE) to the maximum output  
for the mode. (Note: In TIG mode, 10 volts supplied  
to lead 76 would produce the current that has been  
set by the Invertec V350-PRO (CE)’s front panel  
Output Control.)  
• Modular construction for easy servicing.  
• Aluminum Chassis and Wraparound  
• Power Cord included.  
V350-PRO (CE)  
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B-5  
B-5  
OPERATION  
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 (CE) 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 (CE) is not recommended for  
processes other than those listed.  
• The V350-PRO (CE) can only be used with the rec-  
ommended equipment and options.  
RECOMMENDED PROCESSES  
Properly equipped, the Invertec V350-PRO (CE)  
supports GMAW, FCAW, SMAW, GTAW and CAC-  
A processes for a variety of materials, including  
mild steel, stainless steel, cored wires, and alu-  
minum  
V350-PRO (CE)  
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C-1  
C-1  
ACCESSORIES  
OPTIONS / ACCESSORIES  
"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.  
• In this form, the V350-PRO (CE) provides the hard-  
ware to power and connect to 24, 42 or 115 VAC wire  
feeders.  
K857  
K814  
K812  
K870  
K930-1  
Remote Output Control  
Arc Start Switch  
Hand Operated Amptrol  
Foot Operated Amptrol  
TIG Module  
K428, K446, K449  
K617 (-1 or -2) K618 (-1 or -2) LN-742  
LN-25  
K440 (-1), K567-1  
K1559-1, K1564-1  
K1499-1, K1521-1  
LN-7 GMA  
LN-10  
DH-10  
FIELD INSTALLED OPTIONS/ACCESSORIES  
Options for K1728-1 Factory and K1728-3 "CE"  
V350’s  
• TIG Gas Control Kit – K1762-1  
• Advance Process Panel – K1763-1  
• Undercarriage – K1764-1  
• Valet Style Undercarriage – K1838-1  
V350-PR0 (CE)  
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D-1  
D-1  
MAINTENANCE  
VISUAL INSPECTION  
SAFETY PRECAUTIONS  
WARNING  
----------------------------------------------------------------------  
-
Clean 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.  
ELECTRIC SHOCK can kill.  
• Do not touch electrically live parts or  
electrode with skin or wet clothing.  
• Insulate yourself from work and  
ground  
ROUTINE MAINTENANCE  
• Always wear dry insulating gloves.  
------------------------------------------------------------------------  
EXPLODING PARTS can cause  
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:  
injury.  
•
Failed parts can explode or cause other  
parts to explode when power is applied.  
• All printed circuit boards  
• Power switch  
• Main transformer  
• Input rectifier  
•
Always wear a face shield and long  
sleeves when servicing.  
• Auxiliary Transformer  
• Reconnect Switch Area  
------------------------------------------------------------------------  
See additional warning information  
throughout this operator’s manual and  
the Engine manual as well.  
-----------------------------------------------------------  
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.  
CAPACITOR DISCHARGE PROCEDURE  
1. Obtain a power resistor (25 ohms, 25 watts).  
2. Hold resistor body with electrically insulated glove.  
DO NOT TOUCH TERMINALS. Connect the resis-  
tor terminals across the two studs in the position  
shown. Hold in each position for 1 second. Repeat  
for all four capacitors.  
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.  
RESISTOR  
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.  
CAPACITOR  
TERMINALS  
3. Use a DC voltmeter to check that voltage is not  
present across the terminals on all four capacitors.  
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.  
V350-PRO (CE)  
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E-1  
E-1  
TROUBLESHOOTING  
HOW TO USE TROUBLESHOOTING GUIDE  
WARNING  
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.  
__________________________________________________________________________  
This Troubleshooting Guide is provided to help you  
locate and repair possible machine malfunctions.  
Simply follow the three-step procedure listed below.  
Step 3. RECOMMENDED COURSE OF ACTION  
This column provides a course of action for the  
Possible Cause, generally it states to contact your  
local Lincoln Authorized Field Service Facility.  
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.  
If you do not understand or are unable to perform the  
Recommended Course of Action safely, contact your  
local Lincoln Authorized Field Service Facility.  
Step 2. POSSIBLE CAUSE.  
The second column labeled “POSSIBLE CAUSE” lists  
the obvious external possibilities that may contribute  
to the machine symptom.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
V350-PRO (CE)  
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E-2  
E-2  
TROUBLESHOOTING  
Observe all Safety Guidelines detailed throughout this manual  
POSSIBLE AREAS OF  
MISADJUSTMENT(S)  
RECOMMENDED  
COURSE OF ACTION  
PROBLEMS  
(SYMPTOMS)  
1. Contact your local authorized  
Lincoln Electric Field Service  
facility for technical assistance.  
Major physical or electrical damage  
is evident when the sheet metal  
covers are removed.  
1. Make certain that the fuses or  
breakers are properly sized. See  
installation section of the manual  
for recommended fuse and  
breaker sizes.  
Input fuses keep blowing, or input  
breaker keeps tripping  
2. Welding procedure is drawing too  
much output current, or duty  
cycle is too high. Reduce output  
current, duty cycle or both.  
3. There is internal damage to the  
power source. Contact an autho-  
rized Lincoln Electric Service  
facility.  
1. Make certain that the power  
switch is in the "ON" position.  
2. The circuit breaker in the recon-  
Machine will not power up (No  
lights)  
If all recommended possible areas  
nect area may have opened. of misadjustment have been  
Reset. Check input voltage sec- checked and the problem persists,  
tion below.  
Contact your local Lincoln  
3. Input voltage selection made Authorized Field Service Facility.  
improperly. Power down, check  
input voltage reconnect accord-  
ing to diagram on reconnect  
cover.  
Machine won’t weld, can’t get any  
output.  
1. If the displays show an Err ###  
see the fault section for correc-  
tive action.  
2. If the displays are not lit refer to  
machine will not power up sec-  
tion.  
3. If the thermal symbol is lit refer to  
the thermal section.  
4. If the output terminals are in  
Remote control switch to "ON"  
and check for output voltage. If  
output voltage is now present  
check for correct remote control  
connection and operation.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
V350-PRO (CE)  
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E-3  
E-3  
TROUBLESHOOTING  
Observe all Safety Guidelines detailed throughout this manual  
PROBLEMS  
(SYMPTOMS)  
POSSIBLE AREAS OF  
MISADJUSTMENT(S)  
RECOMMENDED  
COURSE OF ACTION  
Thermal symbol is lit  
1. Check for proper fan operation  
2. Check for material blocking  
intake or exhaust louvers.  
Wire feeder won’t work. Apparently 1. Check circuit breakers by the  
no power to wire feeder  
wire feeder receptacles on the  
rear of the machine. Reset  
2. Check to make sure the wire  
feeder is connected to the correct  
wire feeder receptacle. (115VAC  
or 24/42VAC)  
3. Check the control cable between  
the power source and the wire  
feeder for continuity.  
If all recommended possible areas  
of misadjustment have been  
checked and the problem persists,  
Contact your local Lincoln  
Authorized Field Service Facility.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
V350-PRO (CE)  
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E-4  
E-4  
TROUBLESHOOTING  
Observe all Safety Guidelines detailed throughout this manual  
Fault Codes  
Code Description  
Corrective Action  
31  
Primary over current.  
If condition persists  
contact an authorized  
Lincoln Field Service  
Shop  
The machine needs to  
be turned off and back  
on to reset the machine.  
32  
33  
34  
35  
37  
39  
CAP bank A under voltage.  
Check input power  
reconnect to make sure  
the machine  
is connected for the input  
power being supplied.  
Check the machine  
ground.  
If problem persists  
contact an authorized  
Lincoln Field Service  
Shop  
Self-clearing as  
condition ceases.  
CAP bank B under voltage.  
CAP bank A over voltage.  
CAP bank B over voltage.  
Soft start Failed.  
Glitch on the primary over  
current fault interrupt; possibly  
caused by noise or a signal level  
(misc. hardware fault #1)  
Cycle power.  
Self-clearing as  
condition ceases.  
43  
CAP delta; CAP A and B are out  
of balance.  
Check input power  
reconnect to make sure  
the machine is  
connected for the input  
power being supplied.  
Check the machine  
ground.  
44  
47  
Main CPU problem. The DSP  
has detected a problem with the  
CPU.  
Glitch on the CAP/heart beat  
interrupt; possibly caused by  
noise or a signal level right at  
the trip threshold.  
If problem persists  
contact an authorized  
Lincoln Field Service  
Shop  
(misc. hardware fault #2)  
The main contactor opened  
unexpectedly. (misc. hardware  
fault #3)  
48  
If condition persist  
contact an authorized  
Lincoln Field Service  
Shop  
Self-clearing  
"bad The selected weld mode does  
node’ not exist in the weld table that is  
“####” presently loaded in the machine.  
If condition persists  
contact an authorized  
Lincoln Field Service  
Shop  
Press the Mode  
Select button to  
select a different  
mode  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
V350-PRO (CE)  
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E-5  
E-5  
TROUBLESHOOTING  
Observe all Safety Guidelines detailed throughout this manual  
Displays  
Description  
Scrolling dash  
Appears at power up while the machine is going through its self configu-  
ration  
"Err" "####"  
Fault code display. The first fault to occur will be displayed for three  
seconds. The display will cycle through fault codes for all faults that  
persist after the initial three-second period are displayed for 1 sec-  
ond each.  
"----" "----"  
Weld mode is changing  
"----" "####"  
A constant voltage weld mode is selected, machine output is off.  
The numeric value in the right display is the workpoint.  
"####" "----"  
A constant current weld mode is selected, machine output is off.  
The numeric value in the left display is either the workpoint or a  
workpoint limit, depending on the weld mode and remote configura-  
tion.  
"####" "####"(on steady) machine output is on. Left display is current, right display is voltage.  
If actively welding, the displays are arc current and arc voltage. If  
not actively welding, the display will show workpoint.  
"####" "####" (blinking)  
weld just finished – the average arc voltage and current will be  
blinked for 5 seconds following a weld. If the workpoint changes dur-  
ing this 5 second period, the display will revert to the above mode.  
CAUTION  
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your  
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.  
V350-PRO (CE)  
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F-1  
F-1  
DIAGRAMS  
V350-PRO (CE)  
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F-2  
F-2  
DIAGRAMS  
V350-PRO (CE)  
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F-3  
F-3  
DIAGRAMS  
V350-PRO (CE)  
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F-4  
F-4  
DIAGRAMS  
V350-PRO (CE)  
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F-5  
F-5  
DIAGRAMS  
V350-PRO (CE)  
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F-6  
F-6  
DIAGRAMS  
V350-PRO (CE)  
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ENHANCED DIAGRAM  
F-7  
F-7  
DIAGRAMS  
E I N C A H F O M N T O F R  
2 0 8  
4 0 8  
1 0 8  
6 0 8  
7 0 4  
1 0 4  
8 0 4  
2 0 4  
3 0 4  
0 1 4  
1 1 4  
5 0 4  
2 1 4  
6 0 4  
+
+
xxxxxxx  
1
2
5 4  
2 4  
1 M C O  
2 4 V  
2 8 V  
4 2 V  
H 6  
4 2  
3 1  
5 3  
H 5  
H 4  
H 3  
H 2  
4 1 A  
5 4  
H 1  
2
C O M  
1 1 5 V  
F A N  
1 1 5  
V
2 M C O  
F A N  
E I N H A C F O M A E R R  
V350-PRO (CE)  
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F-8  
F-8  
DIAGRAMS  
V350-PRO (CE)  
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NOTES  
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New Lessons in Arc Welding  
Procedure Handbook “Twelfth Edition”  
How to Read Shop Drawings  
Incentive Management  
A New Approach to Industrial Economics $5.00  
The American Century of John C. Lincoln $5.00  
Seminar Information  
(ED-45)  
Educational Video Information  
(ED-93)  
NA  
AC  
James F. Lincoln Arc Welding  
Foundation Book Information  
Welding Preheat Calculator  
Pipe Welding Charts  
$3.00  
$4.50  
WC-8  
ED-89  
(JFLF-515)  
SUB TOTAL  
Additional Shipping Costs if any  
TOTAL COST  
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● Do not touch electrically live parts or  
electrode with skin or wet clothing.  
● Insulate yourself from work and  
ground.  
● Keep flammable materials away.  
● Wear eye, ear and body protection.  
WARNING  
SpanisAh VISO DE  
PRECAUCION  
French  
● No toque las partes o los electrodos ● Mantenga el material combustible  
● Protéjase los ojos, los oídos y el  
bajo carga con la piel o ropa moja-  
da.  
● Aislese del trabajo y de la tierra.  
fuera del área de trabajo.  
cuerpo.  
● Ne laissez ni la peau ni des vête-  
ments mouillés entrer en contact  
avec des pièces sous tension.  
● Gardez à l’écart de tout matériel  
inflammable.  
● Protégez vos yeux, vos oreilles et  
votre corps.  
ATTENTION  
● Isolez-vous du travail et de la terre.  
German  
● Berühren Sie keine stromführenden  
Teile oder Elektroden mit Ihrem  
Körper oder feuchter Kleidung!  
● Isolieren Sie sich von den  
● Entfernen Sie brennbarres Material! ● Tragen Sie Augen-, Ohren- und Kör-  
perschutz!  
WARNUNG  
Elektroden und dem Erdboden!  
Portuguese  
● Não toque partes elétricas e elec-  
trodos com a pele ou roupa molha-  
da.  
● Mantenha inflamáveis bem guarda- ● Use proteção para a vista, ouvido e  
dos.  
corpo.  
ATENÇÃO  
● Isole-se da peça e terra.  
Japanese  
Chinese  
Korean  
Arabic  
READ AND UNDERSTAND THE MANUFACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE  
USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES.  
SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS  
CONSUMIBLES QUE VA A UTILIZAR, SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR.  
LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A  
ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR.  
LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER-  
STELLERS. DIE UNFALLVERHÜTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.  
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● Keep your head out of fumes.  
● Use ventilation or exhaust to  
remove fumes from breathing zone.  
● Turn power off before servicing.  
● Do not operate with panel open or  
guards off.  
WARNING  
Spanish  
● Los humos fuera de la zona de res-  
piración.  
● Mantenga la cabeza fuera de los  
humos. Utilice ventilación o  
aspiración para gases.  
● Desconectar el cable de ali-  
mentación de poder de la máquina  
antes de iniciar cualquier servicio.  
● No operar con panel abierto o  
guardas quitadas.  
AVISO DE  
PRECAUCION  
French  
● Débranchez le courant avant l’entre- ● N’opérez pas avec les panneaux  
tien.  
● Gardez la tête à l’écart des fumées.  
● Utilisez un ventilateur ou un aspira-  
teur pour ôter les fumées des zones  
de travail.  
ouverts ou avec les dispositifs de  
protection enlevés.  
ATTENTION  
German  
● Strom vor Wartungsarbeiten  
abschalten! (Netzstrom völlig öff-  
nen; Maschine anhalten!)  
● Anlage nie ohne Schutzgehäuse  
oder Innenschutzverkleidung in  
Betrieb setzen!  
● Vermeiden Sie das Einatmen von  
Schweibrauch!  
● Sorgen Sie für gute Be- und  
Entlüftung des Arbeitsplatzes!  
WARNUNG  
Portuguese  
● Não opere com as tampas removidas.  
● Desligue a corrente antes de fazer  
serviço.  
● Mantenha-se afastado das partes  
moventes.  
● Não opere com os paineis abertos  
ou guardas removidas.  
● Mantenha seu rosto da fumaça.  
● Use ventilação e exhaustão para  
remover fumo da zona respiratória.  
ATENÇÃO  
● Não toque as partes elétricas nuas.  
Japanese  
Chinese  
Korean  
Arabic  
LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA AS  
PRÁTICAS DE SEGURANÇA DO EMPREGADOR.  
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• World's Leader in Welding and Cutting Products •  
• 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  
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