Parweld XTI-303 AC/DC User manual

INSTRUCTION
MANUAL

OperatOr Manual
ISSue 2
XTI-303 AC/DC

Welcome
Thank you and congratulaons on choosing Parweld. This Owner’s Manual is designed to help you
get the most out of your Parweld products. Please take me to read the Safety precauons. They will
help you protect yourself against potenal hazards in the workplace. With proper maintenance this
equipment should provide years of reliable service. All our systems conform to ISO9001: 2000 and are
independently audited by NQA.
The enre product range carries the CE mark, and is constructed in accordance with European direcves
and the product specic standards where they apply.
Further Informaon
Parweld is the UK’s leading manufacturer of MIG, TIG and Plasma torches and consumables.
For more informaon about Parweld’s complete range visit: www.parweld.com

COntentS
Contents
Page
1.0 Safety Precauons 4
2.0 Product descripon 5
3.0 Technical Specicaons 5
4.0 Descripon of controls 6
5.0 Installaon 7
5.1 Unpacking the Machine 7
5.2 Locaon 7
5.3 Input and grounding connecon 7
5.4 Output Polarity Connecons 7
5.5 Torch Installaon 8
5.6 Work return lead connecon 8
6.0 Operaon 8
6.1 MMA Welding guide 8
6.2 TIG welding guide 9
7.0 Fault nding 10
8.0 Accessories 15
9.0 Statement of warranty 15

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1.0 Safety Precauons
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatal shocks
or severe burns. The electrode and work circuit is
electrically live whenever the output is on. The input
power circuit and machine internal circuits are also
live when power is on.
Do not touch live electrical parts.
Wear dry, sound insulang gloves and body
protecon.
Insulate yourself from work and ground using dry
insulang mats or covers big enough to prevent any
physical contact with the work ground.
Addional safety precauons are required when any
of the following electrically hazardous condions
are present: in damp locaons or while wearing wet
clothing; on metal structures such as oors, grangs,
or scaolds; when in cramped posions such as
sing, kneeling, or lying; or when there is a high risk
of unavoidable or accidental contact with the work
piece or ground.
Disconnect input power before installing or servicing
this equipment. Lockout/tagout input power according
to Safety Standards.
Properly install and ground this equipment according
to naonal and local standards.
Always verify the supply ground - check and ensure
that input power cable ground wire is properly
connected to ground terminal in the receptacle outlet.
When making input connecons, aach proper
grounding conductor rst - double-check connecons.
Frequently inspect input power cable for damage or
bare wiring - replace cable immediately if damaged -
bare wiring can kill.
Turn o all equipment when not in use.
Do not use worn, damaged, under sized, or poorly
spliced cables.
Do not drape cables over your body.
If earth grounding of the work piece is required,
ground it directly with a separate cable.
Do not touch electrode if you are in contact with the
work, ground, or another electrode from a dierent
machine.
Use only well-maintained equipment. Repair or
replace damaged parts at once. Maintain unit
according to manual.
Wear a safety harness if working above oor level.
Keep all panels and covers securely in place.
Clamp work cable with good metal-to-metal contact to
work piece or worktable as near the weld as praccal.
Insulate work clamp when not connected to work
piece to prevent contact with any metal object.
Welding produces fumes and gases. Breathing these
fumes and gases can be hazardous to your health.
FUMES AND GASES can be hazardous.
Keep your head out of the fumes. Do not breathe the
fumes.
If inside, venlate the area and/or use local forced
venlaon at the arc to remove welding fumes and
gases.
If venlaon is poor, wear an approved respirator.
Read and understand the Material Safety Data Sheets
(MSDS’s) and the manufacturer’s instrucons for
metals, consumable, coangs, cleaners, and de-
greasers.
Work in a conned space only if it is well venlated,
or while wearing an air-supplied respirator. Always
have a trained watch person nearby. Welding fumes
and gases can displace air and lower the oxygen level
causing injury or death. Be sure the breathing air is
safe.
Do not weld in locaons near de-greasing, cleaning, or
spraying operaons. The heat and rays of the arc can
react with vapours to form highly toxic and irritang
gases.
Do not weld on coated metals, such as galvanized,
lead, or cadmium plated steel, unless the coang
is removed from the weld area, the area is well
venlated, and while wearing an air-supplied
respirator. The coangs and any metals containing
these elements can give o toxic fumes if welded.
ARC RAYS can burn eyes and skin.
Arc rays from the welding process produce intense,
visible and invisible (ultraviolet and infrared) rays that
can burn eyes and skin. Sparks y o from the weld.
Wear an approved welding helmet ed with a proper
shade of lter lense to protect your face and eyes
when welding or watching
Wear approved safety glasses with side shields under
your helmet.
Use protecve screens or barriers to protect others
from ash, glare and sparks; warn others not to watch
the arc.
Wear protecve clothing made from durable, ame
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resistant material (leather, heavy coon, or wool)
and foot protecon. Welding on closed containers,
such as tanks, drums, or pipes, can cause them to
blow up. Sparks can y o from the welding arc. The
ying sparks, hot work piece, and hot equipment can
cause res and burns. Accidental contact of electrode
to metal objects can cause sparks, explosion,
overheang, or re. Check and be sure the area is safe
before doing any welding.
WELDING can cause re or explosion.
Remove all ammables within 10m of the welding
arc. If this is not possible, ghtly cover them with
approved covers.
Do not weld where ying sparks can strike ammable
material.
Protect yourself and others from ying sparks and hot
metal.
Be alert that welding sparks and hot materials from
welding can easily go through small cracks and
openings to adjacent areas.
Watch for re, and keep a re exnguisher nearby. Be
aware that welding on a ceiling, oor, bulkhead, or
paron can cause re on the hidden side.
Do not weld on closed containers such as tanks,
drums, or pipes, unless they are properly prepared
according to local regulaons
Connect work cable to the work as close to the
welding area as praccal to prevent welding current
from travelling along, possibly unknown paths and
causing electric shock, sparks, and re hazards.
Wear oil-free protecve garments such as leather
gloves, heavy shirt, cuess trousers, high shoes, and
a cap. Remove any combusbles, such as a butane
lighter or matches, from your person before doing any
welding.
FLYING METAL can injure eyes.
Welding, chipping, wire brushing, and grinding cause
sparks and ying metal. As welds cool they can throw
o slag. Wear approved safety glasses with side
shields even under your welding helmet.
BUILDUP OF GAS can injure or kill.
Shut o shielding gas supply when not in use. Always
venlate conned spaces or use approved air-supplied
respirator.
HOT PARTS can cause severe burns.
Do not touch hot parts with bare hands.
Allow cooling period before working on gun or torch.
To handle hot parts, use proper tools and/or wear
heavy, insulated welding gloves and clothing to
prevent burns.
MAGNETIC FIELDS can aect pacemakers.
Pacemaker wearers keep away.
Wearers should consult their doctor before going near
arc welding, gouging, or spot welding operaons.
NOISE can damage hearing.
Noise from some processes or equipment can damage
hearing.
Wear approved ear protecon if noise level is high.
Shielding gas cylinders contain gas under high
pressure.
CYLINDERS can explode if damaged.
Protect compressed gas cylinders from excessive
heat, mechanical shocks, physical damage, slag, open
ames, sparks, and arcs. Install cylinders in an upright
posion by securing to a staonary support or cylinder
rack to prevent falling or pping. Keep cylinders away
from any welding or other electrical circuits. Never
drape a welding torch over a gas cylinder. Never allow
a welding electrode to touch any cylinder. Never weld
on a pressurized cylinder - explosion will result. Use
only correct shielding gas cylinders, regulators, hoses,
and ngs designed for the specic applicaon;
maintain them and associated parts in good condion.
Turn face away from valve outlet when opening
cylinder valve.
Use the right equipment, correct procedures,
and sucient number of persons to li and move
cylinders.
Read and follow instrucons on compressed gas
cylinders, associated equipment, and Compressed Gas
Associaon (CGA) recommendaons.
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12
13
14
2.0 Product Descripon
This welding machine is manufactured using advanced
inverter technology. The input voltage is reced to
DC and then inverted to high frequency AC voltage.
before being converted back to DC for the output .This
allows the use of a much smaller transformer and so
allowing weight saving and improved power eciency.
3.0 Technical Specicaons
XTI-303 AC/DC
Input voltage 400V +/- 10%
Frequency 50/60Hz
Input current 20A max
10 e
Fuse rang 16A
Output OCV 77
Output load
voltage 10-26.6V
Output Current 10-315A DC
Control Plug
The link between 1 and 2 should only be ed when
using a foot control or other remote current control.
The wire colours shown are for the Parweld Ergo TIG
torch.
4.0 Descripon of Controls
1) ON OFF Switch for switching on or o the mains
supply to the machine. Note the output of the
machine is permanently on in MMA mode unless the
on/o switch is in the o posion.
2) Gas input connecon 3/8 BSP male connecon for
TIG welding Gas.
3) Water input connecon, input of cooling water
when using a water cooled TIG torch.
4) Power light This indicates mains power is applied
to the machine and that the machine is currently
switched on when the light is illuminated
5) Fault light This indicates a fault or over temperature
condion with the machine refer to the fault nding
secon for further informaon
6) TIG mode, this toggles between LIFT-ARC mode and
HF start TIG.
7) Process selector switch. This switch has 3 posions
the top posion selects MMA welding and will latch
on the output when in this posion. The centre
posion is TIG welding with 2 touch trigger control
(momentary). The boom posion is TIG welding with
4 touch control (latching)
1
4 5 6 7 8 9 10 11
2
3
COntrOlS
15
16
17 18 19 20 21

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8) Output power switch. This switch has 3 posions
the top posion selects DC output in TIG or MMA
mode. The centre posion selects AC output in MMA
or TIG mode and the boom posion allows a gas test
or purge to be performed when TIG welding.
9) Inial Current/Hotstart This control is dual funcon
in TIG mode it sets the start level for the welding
current as a percentage of the main welding current.
In MMA mode it allows adjustment of the welding
current surge on arc striking to give reliable arc
striking in all condions.
10) Cleaning Control. This control allows the balance
of the AC wave to be altered so increasing or reducing
the cleaning eect when AC TIG welding.
11) Water ow failure indicator This light illuminates
when the water ow is to low when using a water
cooled.
12) Torch selector switch, when using a water cooled
TIG torch this switch should be in the WATER posion,
in this posion if the water ow is to low then the
indicator light (11) will illuminate and the welding
power with be cut o in order to prevent damage to
the torch. For use with a air cooled torch the switch
should be in the AIR posion or the machine will not
operate
13) Post Gas, this allows control of the post gas ow
at the end of a weld when in TIG mode. It is adjustable
from 3 to 10 seconds.
14) Downslope/Arc force. This control is dual
funcon.
in TIG mode it controls the downslope me for the
welding current aer the trigger is released from 0 to
10 seconds.
In MMA mode it allows adjustment of the welding Arc
force so giving control of penetraon.
15) Amperage Display. Displays the welding
amperage.
16) Main amperage control. This control is used to
control the welding current in TIG and MMA modes.
17) Gas Output connecon
This is a 3/8 BSP connecon for the gas
output used in TIG welding.
18) Negave connecon. This is used to connect
the earth lead in MMA welding or the torch in TIG
welding.
19) Control socket This is used to control the machine
remotely using a trigger or amperage control
20) Posave connecon This is used to connect the
electrode holder in MMA or the earth lead in TIG
welding.
21) Water out connecon for a water cooled TIG torch
5.0 Installaon
Read enre installaon secon before starng
installaon.
SAFETY PRECAUTIONS
• ELECTRIC SHOCK can kill.
• Only qualied personnel should perform this
installaon.
• Only personnel that have read and understood the
Operang Manual should install and operate this
equipment.
• Machine must be grounded per any naonal, local
or other applicable electrical regulaons.
• The power switch is to be in the OFF posion when
installing work cable and electrode cable and when
connecng other equipment.
5.1 Unpacking the Machine
Carefully remove the machine from the packaging,
we recommend you retain the packaging unl the
machine has been fully installed and tested incase it
has been damaged in transit and has to be returned to
the re-seller.
5.2 Locaon
Be sure to locate the welder according to the following
guidelines:
In areas, free from moisture and dust.
Ambient temperature between 0-400C.
In areas, free from oil, steam and corrosive gases.
In areas, not subjected to abnormal vibraon or shock.
In areas not exposed to direct sunlight or rain.
Place at a distance of 12” (300 mm) or more from
walls or similar that could restrict natural airow for
cooling.
5.3 Input and grounding connecon
WARNING
Before starng the installaon, check that your
power supply is adequate for the voltage, amperage,
phase, and frequency specied on the Machine
nameplate.
Operate the welding power source from a 3-phase
50/60 Hz, AC power supply. The input voltage must
match one of the electrical input voltages shown
on the input data label on the unit nameplate. The
XTI-303 ACDC machine should only be used on 400V
supply. Refer to the specicaons table for voltage
tolerances.
Have a qualied electrician connect the input plug.
For long runs over 30m , larger copper wires should
be used. The green/yellow wire in the input cable
connects to the frame of the machine. This ensures
proper grounding of the machine when the machine
plug is inserted into the receptacle.
5.4 Output Polarity Connecons
Electrode polarity
MMA electrodes are generally connected to the ‘+’
terminal and the work lead to the ‘-‘terminal
But if in doubt consult the electrode manufacturer’s
literature.
IF TIG welding the torch should always be connected
to the ‘-’ terminal.
OperatIOn

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the occurrence in this zone of under-bead cracks.
Hardened zone and under-bead cracks in the weld
area may be reduced by using the correct electrodes,
preheang, using higher current sengs, using larger
electrodes sizes, short runs for larger electrode
deposits or tempering in a furnace.
Manganese steels
The eect on manganese steel of slow cooling from
high temperatures is enbrilement. For this reason it
is absolutely essenal to keep manganese steel cool
during welding by quenching aer each weld or skip
welding to distribute the heat.
Cast iron
Most types of cast iron, except white iron, are
weldable. White iron, because of its extreme
brileness, generally cracks when aempts are made
to weld it. Trouble may also be experienced when
welding white-heart malleable, due to the porosity
caused by gas held in this type of iron.
Copper and alloys
The most important factor is the high rate of heat
conducvity of copper, making preheang of heavy
secons necessary to give proper fusion of weld and
base metal.
Types of electrodes
Arc welding electrodes are classied into a number
of groups depending on their applicaons. There are
a great number of electrodes used for specialized
industrial purposes which are not of parcular interest
for everyday general work. These include some low
hydrogen types for high tensile steel, cellulose types
for welding large diameter pipes, etc. The range of
electrodes dealt with in this publicaon will cover the
vast majority of applicaons likely to be encountered;
are all easy to use and all will work on even the most
basic of welding machines.
Metals being joined & electrode comments
Mild steel
6013 ideal electrodes for all general purpose work.
Features include outstanding operator appeal, easy
arc starng and low spaer.
Mild steel
5.5 Torch installaon
MMA cable connecons
Connect electrode lead to posive terminal
TIG welding cable connecon
Connect the TIG torch to the - terminal and the gas
hose the gas outlet connecon. If using a water cooled
torch, connect the water supply hose to the water
connecon on the front of the machine. The trigger
control should be connected to the front panel socket.
5.6 Work return lead connecon
MMA cable connecons
Connect work lead to negave terminal
TIG welding
Connect the work return lead to the + terminal
6.0 Operaon
WARNING
When using an open arc process, it is necessary to
use correct eye, head, and body protecon.
6.1 MMA Welding Guide
Eects of MMA welding various materials
High tensile and alloy steels
The two most prominent eects of welding these
steels are the formaon of a hardened zone in the
weld area, and, if suitable precauons are not taken,
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7014 all posional electrode for use on mild and
galvanized steel furniture, plates, fences, gates, pipes
and tanks etc. Especially suitable for vercal down
welding.
Cast iron
99% nickel suitable for joining all cast irons except
white cast iron
Stainless steel
318l-16 high corrosion resistance. Ideal for dairy work,
etc. On stainless steels.
6.2 TIG Welding guide
Tig welding cable connecon
Connect the TIG torch to the - terminal and the work
lead to the + terminal for direct current straight
polarity. Direct current straight polarity is the most
widely used polarity for DC TIG welding. It allows
limited wear of the electrode since 70% of the heat is
concentrated at the work piece. Connect the gas hose
on the TIG torch to the gas outlet on the gas regulator.
OperatIOn
23
4567
Torch starng in HF mode
Ensure the gas supply is switched on to the machine.
Select HF start on the front panel. Hold the torch with
the p of the tungsten approx 2-3 mm from the job.
Depress the trigger to start the gas ow and switch on
the power. At the end of the weld release the torch
trigger and the power will slope down and switch o.
TIG welding guide ranges
Electrode diameter AC current
(amps)
DC current
(amps)
0.040” (1.0mm) 15-30 20-60
1/16” (1.6mm) 60-120 75-150
3/32” (2.4mm) 100-180 150-250
Tungsten electrode types
Type Applicaon Colour
Thoriated 2% DC welding of
mild steel,
Stainless steel
and Copper
Red
Ceriated 2% DC welding
of mild steel,
Stainless steel,
Copper
AC welding of
aluminium,
magnesium and
their alloys
Grey
Zirconiated AC welding of
aluminium,
magnesium and
their alloys
White
Guide for selecng ller wire diameter
Filler wire diameter Current range
1/16” (1.6 mm) 20 - 90
3/32” (2.4 mm) 65 - 115
1/8” (3.2 mm) 100 - 165
3/16” (4.8 mm) 200-350
1
Torch starng in Li TIG mode
Ensure the gas supply is switched on to the machine.
Move the selector switch on the front panel of the
machine to the LIFT-TIG posion. Briey contact the
p of the tungsten electrode down onto the work
piece with the torch at around 700 from vercal.
Depress the trigger to start the gas ow and switch
on the power, li the torch up from the work piece to
draw out an arc. To prevent melng of the end of the
tungsten the machine will increase the output current
when it detects the rise in arc voltage as the tungsten
is lied from the work piece. At the end of the weld
release the torch trigger and the power will slope
down and switch o.
8

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Fault
FInDInG
3) Select AC output from (centre posion)
4) Dial up the welding amperage required
5) Set the starng amperage at 50%
6) Set the down slope at 5 seconds
7) Set the post gas at around 5 seconds
8) Set the cleaning control to 0.
You are now ready to weld. The above sengs are
a guide and you should adjust to suit the job you are
welding if you are unfamiliar with the machine try to
adjust only one parameter at a me so you become
familiar with its eect. With AC TIG welding the
cleaning control is used to adjust the balance between
heang and cleaning the work, For speed an longevity
of the Tungsten it is best to minimise the cleaning
eect but how low this can be adjusted will depend
upon the condion of the base material
7.0 Fault Finding
MMA welding problem
Descripon Possible cause Remedy
Gas pockets
or voids in
weld metal
(porosity)
(a) Electrodes are
damp
(b) Welding current
is too high.
(c) Surface
impuries such as
oil, grease, paint,
etc
(a) Dry
electrodes
before use
(b) Reduce
welding current
(c) Clean joint
before welding
Crack occur-
ring in weld
metal soon
aer solidi-
caon.
(a) Rigidity of joint.
(b) Insucient
throat thickness.
(c) Cooling rate is
too high.
(a) Redesign
to relieve weld
joint of severe
stresses or use
crack resistance
electrodes.
(b) Travel
slightly slower
to allow greater
build up in
throat.
(c) Preheat
plate and cool
slowly.
The ller wire diameter specied is a guide only, other
diameter wires may be used according to the welding
applicaon.
Shielding gas selecon
Alloy Shielding gas
Aluminium &
alloys Pure Argon
Carbon steel Pure Argon
Stainless steel Pure Argon
Nickel alloy Pure Argon
Copper Pure Argon
Titanium Pure Argon
Machine setup for TIG welding
DC TIG welding
Connect the torch as detailed previously
1) Select HF start (boom posion)
2) Set the process mode to 2T or 4T if you prefer a
latching trigger acon. (Note in 4T posion you must
press and release to start the process and press and
release again to stop the process)
3) Select DC output from (top posion)
4) Dial up the welding amperage required
5) Set the starng amperage at 50%
6) Set the down slope at 5 seconds
7) Set the post gas at around 5 seconds
You are now ready to weld. The above sengs are a
guide and you should adjust to suit the job you are
welding if you are unfamiliar with the machine try to
adjust only one parameter at a me so you become
familiar with its eect.
AC TIG welding
Connect the torch as detailed previously
1) Select HF start (boom posion)
2) Set the process mode to 2T or 4T if you prefer a
latching trigger acon. (Note in 4T posion you must
press and release to start the process and press and
release again to stop the process)

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Descripon Possible cause Remedy
A gap is le by
failure of the
weld metal to
ll the root of
the weld
(a) Welding current
is too low.
(b) Electrode too
large for joint.
(c) Insucient gap
(d) Incorrect
sequence
(a) Increase
welding current
(b) Use smaller
diameter
electrode.
(c) Allow wider
gap
(d) Use correct
build-up
sequence
Porons of
the weld run
do not fuse to
the surface of
the metal or
edge of the
joint.
(a) Small electrodes
used on heavy cold
plate
(b) Welding current
is too low
(c) Wrong electrode
angle
(d) Travel speed
of electrode is too
high
(e) Scale or dirt on
joint surface
(a) Use larger
electrodes and
preheat the
plate
(b) Increase
welding current
(c) Adjust angle
so the welding
arc is directed
more into the
base metal
(d) Reduce
travel speed of
electrode
(e) Clean
surface before
welding.
Descripon Possible cause Remedy
Non-metallic
parcles
are trapped
in the weld
metal (slag
inclusion).
a) Non-metallic
parcles may
be trapped in
undercut from
previous run
(b) Joint
preparaon too
restricted
(c) Irregular
deposits allow slag
to be trapped.
(d) Lack of
penetraon with
slag trapped
beneath weld bead.
(e) Rust or mill
scale is prevenng
full fusion.
(f) Wrong electrode
for posion in
which welding is
done.
a) If bad
undercut is
present, clean
slag out and
cover with
a run from
a smaller
diameter
electrode.
(b) Allow for
adequate
penetraon
and room for
cleaning out
the slag
(c) If very
bad, chip or
grind out
Irregularies
(d) Use smaller
electrode
with sucient
current to
give adequate
penetraon.
adequate
penetraon.
Use suitable
tools to remove
all slag from
corners
(f) Use
electrodes
designed for
posion in
which welding
is done,
otherwise
proper control
of slag is
dicult.
TIG welding problems
Weld quality is dependent on the selecon of the
correct consumables, maintenance of equipment and
proper welding technique.
Fault
FInDInG

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Descripon Possible Cause Remedy
Electrode
melts or
oxidizes
when an arc
is struck
(a) No gas owing
to welding region
(b) Torch is clogged
with dust
(c) Gas hose is cut
(d) Gas passage
contains impuries
(e) Gas regulator is
turned o
(f) Torch valve is
turned o
(g) The electrode
is too small for the
welding current
(a) Check the
gas lines for
kinks or breaks
and gas cylinder
contents
(b) Clean torch
(c) Replace gas
hose
(d) Disconnect
gas hose from
torch then raise
gas pressure
to blow out
impuries.
(e) Turn on
(f) Turn on
(g) Increase
electrode
diameter or
reduce the
welding current
Poor weld
nish
Inadequate
shielding gas
Increase gas
ow or check
gas line for gas
ow problems
Arc uers
during TIG
welding
(a) Tungsten
electrode is too
large for the
welding current
(b) Absence of
oxides in the Weld
pool.
(a) Select
the right size
electrode. Refer
to basic TIG
welding guide.
(b) Refer basic
TIG welding
guide for ways
to reduce arc
uer
Fault
FInDInG
Descripon Possible Cause Remedy
Excessive
bead build
up or poor
penetraon
or poor
fusion at
edges of
weld
Welding current is
too low
Increase weld
current and/
or faulty joint
preparaon
Weld bead
too wide
and at or
undercut
at edges
of weld or
excessive
burn
through
Welding current is
too high
Decrease weld
current
Weld bead
too small or
insucient
penetraon
or ripples
in bead
are widely
spaced
apart
Travel speed too
fast
Reduce travel
speed
Weld bead
too wide or
excessive
bead build
up or
excessive
penetraon
in bu joint
Travel speed too
slow
Increase travel
speed
Uneven leg
length in
llet joint
Wrong placement
of ller rod
Re-posion ller
rod
Electrode
melts when
arc is struck
Electrode is
connected to the
‘+’ terminal
Connect the
electrode to the
‘-‘ terminal
Dirty weld
pool
(a) Electrode
contaminated
through contact
with work piece or
ller rod material
(b) Gas contami-
nated with air
(a) Clean the
electrode by
grinding o the
contaminates
(b) Check gas
lines for cuts
and loose ng
or change gas
cylinder
12

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Descripon Possible Cause Remedy
Welding arc
cannot be
established
(a) Work clamp is
not connected to
the work piece or
the work/torch
leads are not
connected to the
machine
(b) Torch lead is
disconnected
(c) Gas ow
incorrectly set,
cylinder empty or
the torch valve is
o
a) Connect the
work clamp to
the work piece
or connect the
work/torch
leads to the
right welding
terminals.
(b) Connect it to
the ‘.’ terminal.
(c) Select the
right ow
rate, change
cylinders or turn
torch valve on.
Arc start is
not smooth
(a) Tungsten
electrode is too
large for the
welding current .
(b) The wrong
electrode is being
used for the
welding job.
(c) Gas ow rate is
too high.
(d) Incorrect
shielding gas is
being used.
(e) Poor work
clamp connecon
to work piece
(a) Select
the right size
electrode
(b) Select the
right electrode
type. Refer
to basic TIG
welding guide
(c) Select the
correct rate for
the welding job.
Refer to basic
TIG welding
guide
(d) Select the
right shielding
gas. Refer
to basic TIG
welding guide
(e) Improve
connecon to
work piece
Power source problems
Descripon Possible cause Remedy
The
welding arc
cannot be
established
(a) The primary
supply voltage has
not been switched
on
(b) The welding
power source switch
is switched o
(c) Loose
connecons
internally
(a) Switch on
the primary
supply voltage
(b) Switch on
the welding
power source.
(c) Have a
qualied service
engineer repair
the connecon
Maximum
output
welding
current
cannot be
achieved
with
nominal
mains
supply
voltage
Defecve control
circuit
Have a qualied
service
engineer
inspect then
repair the
welder
Welding
current
reduces
when
welding
Poor work lead
connecon to the
work piece
Ensure that
the work lead
has a reliable
electrical
connecon to
the work piece
A total loss
of power,
pilot lamp
is o, no
output, the
fan is not
operang
(a) Failure of input
voltage
(b) Possible over
voltage
(c) Internal fault
with the machine
(a) Re-establish
mains supply
(b) Check
voltage and
if necessary
move machine
to alternave
supply
(c) Have a
qualied service
engineer
inspect then
repair the
welder
Fault
FInDInG
13

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Descripon Possible cause Remedy
Fault lamp
is on, no
power
output
(a) Machine
overheated
(b) Over current
state
(c) Internal fault
with machine
(a) Allow to
cool with fan
running
(b) Switch o
mains power
to the machine
and re start
(c) Have a
qualied service
engineer
inspect
then repair the
welder
ROUTINE MAINTENANCE
The only roune maintenance required for the power
supply is a thorough cleaning and inspecon, with the
frequency depending on the usage and the operang
environment.
Warning
Disconnect primary power at the source before
removing the cover. Wait at least two minutes before
opening the cover to allow the primary capacitors to
discharge.
To clean the unit, remove the screws securing the
outer cover, li o the outer cover and use a vacuum
cleaner to remove any accumulated dirt and dust. The
unit should also be wiped clean, if necessary; with
solvents that are recommended for cleaning electrical
apparatus.
Fault
FInDInG
14

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8.0 Accessories
Stock Code Descripon
CKE403 Electrode Holder with 3m Lead
CKC403 Earth Lead 3m with Clamp
ER26-123KBD18 ERGO Tig Torch with remote
control
WP26AK Tig Spares Kit in Plasc Case
8.2 Gas equipment
Everyday Gas Regulators – 300 BAR
Single Stage
Features
Flow rate up to 96m3/h (3389 3/h)
• Full 300 bar capability
• Outlet pressure indicated on the
bonnet
• Boom entry design suited for top
outlet cylinder valves
Fings
• Fied with standard 3/8” BSP outlet
• Fied with 5/8” BSP inlet connecons
Stock Code Descripon Maximum Outlet
Pressure
E700140 Argon Preset Regulator 3.0 Bar
E700141 Argon Indicator Regulator 3.0 Bar
E700113 1 Gauge Argon 30 lpm ow
E700123 2 Gauge Argon 30 lpm ow
Flow Meters
Features
• Designed from brass bar whilst the tube and cover
are moulded from high quality polycarbonate to
ensure high impact resistance and clarity
• Calibrated to operate at an inlet pressure
of 30PSI
• Sensive needle valve provides easy
adjustment and the downward facing
outlet connecon eliminates hose
kinking.
Fings
• Fied with standard 3/89 BSP inlet and outlet
connecons
Stock Code Descripon
706100 Flow Meter Mixed Gas 15 lpm
aCCeSSOrY
15
9.3 Statement of Warranty
Limited Warranty:
Parweld Ltd, hereaer, “Parweld” warrants its
customers that its products will be free of defects
in workmanship or material. Should any failure to
conform to this warranty appear within the me
period applicable to the Parweld products as stated
below, Parweld shall, upon nocaon thereof and
substanaon that the product has been stored,
installed, operated, and maintained in accordance
with Parweld’s specicaons, instrucons,
recommendaons and recognized standard industry
pracce, and not subject to misuse, repair, neglect,
alteraon, or accident, correct such defects by
suitable repair or replacement, at Parweld’s sole
opon, of any components or parts of the product
determined by Parweld to be defecve.
Parweld makes no other warranty, express or
implied. This warranty is exclusive and in lieu of all
others, including, but not limited to any warranty
of merchantability or tness for any parcular
purpose.
Limitaon of Liability:
Parweld shall not under any circumstances
be liable for special, indirect or consequenal
damages, such as, but not limited to, lost prots
and business interrupon. The remedies of the
purchaser set forth herein are exclusive and the
liability of Parweld with respect to any contract,
or anything done in connecon therewith such as
the performance or breach thereof, or from the
manufacture, sale, delivery, resale, or use of any
goods covered by or furnished by Parweld whether
arising out of contract, negligence, strict tort, or
under any warranty, or otherwise, shall not, except
as expressly provided herein, exceed the price of
the goods upon which such liability is based. No
employee, agent, or representave of Parweld is
authorized to change this warranty in any way or
grant any other warranty.
Purchaser’s rights under this warranty are void if
replacement parts or accessories are used which in
Parweld’s sole judgement may impair the safety or
performance of any Parweld product.
Purchaser’s rights under this warranty are void if
the product is sold to purchaser by non-authorized
persons.
The warranty is eecve for the me stated
below beginning on the date that the authorized
Distributor delivers the products to the purchaser.
Notwithstanding the foregoing, in no event shall the
warranty period extend more than the me stated
plus one year from the date Parweld delivered the
product to the authorized distributor.