XPOtool 63317 User manual

User’s manual
Welding Machine MMA–169M
63317
Illustration similar, may vary depending on model
Read and follow the operating instructions and safety information before using for the first time.
Technical changes reserved!
Illustrations, functional steps, and technical data may deviate insignificantly due to continuous further
developments.
Updating the documentation
If you have suggestions for improvement or have found any irregularities, please contact us.

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The information contained in this document may alter at any time without prior notice. No part of this
document may be copied or otherwise duplicated without prior written consent. All rights reserved.
WilTec Wildanger Technik GmbH cannot be held liable for any possible mistakes in this operating man-
ual, nor in the diagrams and illustrations shown.
Although WilTec Wildanger Technik GmbH has made every possible effort to ensure that this operating
manual is complete, accurate, and up-to-date, errors cannot be ruled out entirely.
If you have found an error or wish to suggest an improvement, we look forward to hearing from you.
Send us an e-mail to:
[email protected]
or use our contact form:
https://www.wiltec.de/contacts/
The most recent version of this manual in several languages can be found in our online shop:
https://www.wiltec.de/docsearch
Our postal address is:
WilTec Wildanger Technik GmbH
Königsbenden 12
52249 Eschweiler – Germany
To return your goods for exchange, repair, or other purposes, please use the following address. Atten-
tion! To allow for a trouble-free complaint or return, it is important to contact our customer service team
before returning your goods.
Retourenabteilung
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler – Germany
E-mail: [e-mail]
Tel: [phone]
Fax: [phone]

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Introduction
Thank you for choosing to purchase this quality product. To minimise the risk of injury, we ask you to
always take some basic safety precautions when using this product. Please read this operating manual
carefully and make sure that you understand it.
Keep these operation instructions in a safe place.
Safety instructions
Welding is dangerous and might harm you or others. Therefore, you must protect yourself appropriately
when welding. Refer to the user’s safety rules in accordance with the manufacturer’s safety precautions.
•Before operating the machine, you must be trained professionally.
•Use state (national) safety agency-approved industrial safety welding material.
•The user must be qualified and have a valid metal welding certificate (OFC).
•Avoid electric shocks. They can lead to severe injuries or even death.
•Install the earth equipment according to the application criteria.
•Never touch live components if wearing wet gloves/clothes or if having skin contact.
•Make sure that you are insulated from the ground and workpiece.
•Make sure that you have a secure working position.
•Before maintaining or repairing the welding machine, disconnect it from the mains.
•Breathing in smoke or gas can be harmful to your health.
•Therefore, keep your head away from smoke and gas to avoid breathing in of welding exhaust
fumes.
•When welding, ensure a good ventilation of the working zone by using extraction or ventilation
units.
•Welding arc radiation can cause eye damages and skin burns. Therefore, to protect your eyes
and body, wear a suitable welding helmet.
•Use appropriate protective screens to protect persons standing nearby.
•Any improper operation can provoke a fire or an explosion.
•Welding sparks can cause fire. Therefore, make sure that no flammable material is nearby and
pay attention to possible fire dangers.
•Have a fire-extinguisher at hand and have a trained person use it in case.
•Welding air-tight containers is forbidden.

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•The welding machine can only be used for welding. Any improper use (e.g., defrosting pipes,
recharging batteries, or heating) is strictly forbidden.
•Do not touch hot workpieces with bare hands; otherwise, you will be severely burnt.
•During permanent use of the welding machine, cooling is necessary.
•Magnetic fields impair pacemakers.
•Persons equipped with pacemakers should leave the immediate welding zone before having
consulted a doctor.
•Moving parts can provoke injuries.
•Therefore, keep hands, hair, and tools aways from moving parts such as the fan to avoid injuries
or damages to the machine.
•All doors, panels, covers, and other protective devices must be closed during operation.
Working environment
•Welding should be performed within a dry environment.
•The temperature within the working zone should be comprised between -10 ℃ and 40 ℃.
•Avoid welding outdoors, unless you be protected from sunlight and rain. Always keep the ma-
chine dry and do not place it to a wet ground or in a puddle.
•Avoid welding in dusty areas or in areas with presence of corrosive chemical gases.
•Gas-shielded welding should be performed in a zone without a lot of draught.
Ventilation
During welding, there is presence of a heavy current; therefore, the natural draught cannot provide
sufficient cooling. Ensure good ventilation via the ventilation slots of the machine. The minimum distance
between the machine and all other objects within or near the working zone should be 30 cm. Good
ventilation is vital for the normal performance and service life of the machine.
Welding
This welding machine is equipped with an overcurrent protection, overvoltage protection, and overheat-
ing protection. If the input voltage or output current is too high or the inner temperature of the machine
gets too hot, the machine switches itself off automatically. When used too much (e.g., use with too high
a tension), the machine might be damaged; take account of it.
Welding is forbidden with the machine being overcharged. Bear in mind to always respect the maximum
load current (see corresponding duty cycle). Make sure that the welding current does not exceed the
maximum load current. If the machine is overcharged, its service life can be reduced or it might even be
damaged.
Overvoltage is forbidden. The tension range for the power supply of the machine is given in the “Welding
parameters” chart (see below). The machine is equipped with an automatic tension compensation that
keeps the tension range within the rated range. Should the input tension exceed the given value, the
components of the machines might be damaged.

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Sudden standstill might happen if the machine is in a protection cycle. In this case, restarting the ma-
chine is not necessary. Let the integrated fan running and lowering the inner temperature of the machine.
Control panel
Technical specifications
Model name
MMA-169
Intake voltage (V)
1~220 V
Frequency (㎐)
50/60
Current (A)
20–160
No-load voltage (V)
63–65
Relative operating cycle (%)
35
Isolation class
F
IP code
IP21S
Installation and operation
Note!
•Only install the machine according to the steps below.
•Switch off the power supply before performing the electric connections.
•The IP code of the machine being IP21S, the machine must not be used in the rain.
Installation
1. Connect the power cable to the power supply.
2. Using a multimeter, check if the voltage value is comprised within an acceptable range.

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3. Plug the electrode holder into the “+” connection of the front of the welding machine and tighten
it clockwise.
4. Plug the cable plug into the “–” connection of the front of the welding machine and tighten it
clockwise.
5. For safety reasons, an earth connection is required.
Operation
1. After installing the machine as described and switching the power switch on, the machine is
started with the power LED lit and the fan running.
2. The welding current must be adjusted considering different factors, e.g., the material thickness
of the piece or the diameter of the electrodes.
3. Clamp the electrode to the electrode holder and light the arc to begin welding. The LCD display
might show “Working amp” when doing so,
Welding parameters
⌀ Electrode (㎜)
Recommended welding current (A)
Recommended welding tension (V)
1.0
20–60
20.8–22.4
1.6
44–84
21.76–23.36
2.0
60–100
22.4–24.0
2.5
80–120
23.2–24.8
3.2
108–148
23.32–24.92
4.0
140–180
24.6–27.2
5.0
180–220
27.2–28.8
6.0
220–260
28.8–30.4
Note! This chart refers to welding of normal carbon steel. For welding other materials, refer to the cor-
responding materials and welding methods.
Maintenance
Attention!
The following operation instructions require sufficient electrotechnical and extensive safety knowledge.
The users must have a valid proof of qualification documenting their abilities and knowledge. Make sure
that the input cable is disconnect of the device if disconnected from the mains before uncovering the
welding machine.
•Check regularly if the inner circuit contacts are in a good condition (especially the plugs). Re-
tighten any loose contact. If there is oxidation, remove it using sandpaper, then reconnect the
contacts.
•Clean the dust with dry and clean pressurised air on a regular basis. Used within a highly smoky
and dirty, the machine should be cleaned daily. The pressure of the pressurised air should not
be too high lest small inner components not be damaged.
•Prevent rain, water, and damp from entering the filter of the machine. Should this happen any-
how, dry the device and check the insulation (including the insulation between the connection
points and the insulation between the connection and case). The device can be re-used after
you have ascertained that there are no further abnormal phenomena.
•Check on a regular basis if the insulation covers of all cables are in a good condition. If they are
damaged, re-wrap or replace them.
•Store the device in its original packing and in a dry spot if will not be used for a long period.

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Troubleshooting
Problem
Proposed solution
The device is switched on, yet the power LED is
off, the fan does not work, and there is no welding
performance.
1. Check if the power switch is switched off.
2. Check for loose cables inside the ma-
chine.
3. Missing input power
4. Defective fan
The display is normal, the fan is working normally,
yet there is no output current.
1. Check if the inner cable is in good condi-
tion.
2. Check if the inner connections are in good
condition.
3. Check if the power LED is lit. If not, there
is a circuit problem.
The machine is switched on, yet the fan does not
work nor is there any output current.
1. Defective external power supply
2. Damage to the supply cable
The machine is switched on, welding works nor-
mally, yet there is a sudden activation of the pro-
tection switch.
1. The input current is too high due to an
electric leak.
2. IGBT (Insulated Gate Bipolar Transistor)
or bridge damaged
The machine is switched on, yet the output current
is too low during welding.
1. Insufficient cable connection of the poten-
tiometer
2. Potentiometer damaged
3. Error in the circuit
The electrode holder is getting very hot.
The nominal current of the electrode holder is
lower than the actual working current. Replace it
with an electrode holder that has a higher nominal
current.
Excess of welding spatters during MMA welding.
The output polarity is inverted. Reverse polarity.

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Regulations for waste disposal
The Waste Electrical and Electronic Equipment Directive (WEEE Directive, 2012/19/EU) of the EU was
implemented in the German law related to electrical and electronic equipment and appliances.
All WilTec electric devices that fall under the WEEE directive are labelled with the symbol of a crossed-
out wheeled rubbish bin. This symbol indicates that this electric device must not be disposed of with the
domestic waste.
WilTec Technik GmbH is registered with the German registration authority EAR (Stiftung Elektro-
Altgeräte Register) under the WEEE-registration number DE45283704.
Disposal of used electrical and electronic devices (in-
tended for use in the countries of the European Union
and other European countries with a separate waste
collection system for these devices).
The symbol on the packaging or the product itself indi-
cates that this product must not be treated as normal
domestic waste but must be disposed of at a recycling
collection station for electrical and electronic waste.
By disposing of this product correctly, you contribute to
the protection of the environment and the health of your
fellow people. Inappropriate disposal threatens the en-
vironment and health.
Material recycling helps to reduce the consumption of raw materials.
Additional information about the recycling of this product can be provided by your local commune, the
municipal waste disposal facilities, or the store where you purchased the product.
Address:
WilTec Wildanger Technik GmbH
Königsbenden 12 / 28
52249 Eschweiler Germany
Important Note:
Reproduction and any commercial use (of parts) of this operating manual, requires a written permission
of WilTec Wildanger Technik GmbH.