Mac Afric MMA 315G User manual

MMA 315G/400G WELDING MACHINE
USER MANUAL

Preface
This manual includes hardware description and operation introduction of the equipments. For your and
other people’s safety, please read the manual carefully.
Pay attention
Pay attention to the words after the signs below.
Sign Description
The words after this sign means there is great potential danger,
which may cause major accident, damage or even death, if it is not
followed.
The words after this sign means there is some potential danger,
which may cause hurt or property lose, if it is not followed.
The words after this sign means there is potential risk, which may
cause equipment fault or break, if it is not followed.
Version
Version YF-TAE-0036, A3, Released on 08th, Feb., 2017.
The contents of this manual are updated irregularity for updating of product. The manual is only used as
operation guide, except for other promises. No warranties of any kind, either express or implied are
made in relation to the description, information or suggestion or any other contents of the manual.
The images shown here are indicative only. If there is inconsistency between the image and the actual
product, the actual product shall govern.

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CONTENTS
SAFETY WARNING ···································································································································4
MACHINE DESCRIPTION·························································································································9
TECHNICAL PARAMETERS TABLE ·······································································································10
INSTALLATION INSTRUCTION···············································································································12
OPERATION INSTRUCTION···················································································································14
PANEL FUNCTION INSTRUCTION·········································································································15
NOTES OR PREVENTIVE MEASURES ·································································································16
QUESTIONS TO BE RUN INTO DURING WELDING·············································································17
MAINTENANCE ·······································································································································18
TROUBLESHOOTINGAND FAULT FINDING·························································································19
APPENDIX ⅠCIRCUIT DIAGRAM········································································································20
APPENDIX ⅡCOMPONENTAND LIST ·······························································································21

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SAFETY WARNING
The safety notes listed in this manual is to ensure correct use of the machine and to keep you and other
people from being hurt.
The design and manufacture of welding machine considers safety. Please refer to the safety warning
listed in the manual to avoid accidents.
Different damage would be caused by wrong operation of the equipment as follows. Please read the
user manual carefully to reduce such damage.
Sign Description
²Any contact of electric parts may cause fatal electric shock or burnt.
²Gas and fumes are harmful to health.
²Operation in narrow space may cause choke .
²Spark and hot workpiece after welding may cause fire.
²Bad connected cable may cause fire.
²Incompletion connection of workpiece side circuit may cause fire.
²Never weld on the case of tinder stuff, or it may cause explode.
²Never weld airtight containers such as slot, pipe etc., or it may break.
²Arc ray may cause eye inflammation or skin burnt.
²Spark and residue will burn your eyes and skin.
²Toppling over of the gas cylinder will cause body hurt.
²Wrong use of the gas cylinder will lead to high-pressure gas eruption
and cause human hurt.
²Never let fingers, hair, clothes or etc. near the moving parts such as
the fan.
²The wire shoot out of the torch may stab eyes, face and other naked
parts.
²Never stand in front of the swang equipment or under it, or it may fail
and cause injury.

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Please follow the rules below to avoid heavy accidents.
˜Never use the equipment to do other things but welding.
˜Follow related regulations for the construction of the input-driven power source, choice of
place, usage of high-pressure gas, storage, configuration, safe-keeping of workpiece after
welding and disposal of waste, etc.
˜Nonessentials do not enter the welding area.
˜People using heart pacemaker is not allowed to get close to the welding machine or area
without doctor’s permission. The magnetism created by energizing the welding machine can
have a bad effect to the pacemaker.
˜Install, operation, check and maintain the equipment by profession personnel.
˜Understanding the contents of the user manual for safety.
Please follow the rules below to avoid electric shock。
˜Keep away from any electric parts.
˜Earth the machine and workpiece by professional personnel.
˜Cut off the power before installation or checking, and restart 5 minutes later. The capacitance
is chargeable device. Please ensure it has no voltage before start again even if the power
source is cut off.
˜Do not use wire with inadequate section surface or damage insulation sleeve or even exposed
conductor.
˜Do ensure well isolation of wire connection.
˜Never use the device when the enclosure is removed.
˜Never use broken or wet insulation gloves.
˜Use firenet when work at high position.
˜Check and maintain regularly, don’t use it until the broken parts are fixed well.
˜Turn off the power when not in used.
˜Follow the national or local related standard and regulations when using the AC welding
machine at narrow or high position.

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Please follow the below notes to avoid fire and explode, etc.
˜No combustible in welding area.
˜Keep off combustible when welding.
˜Keep hot workpiece after welding away from flammable gas.
˜Do move away the combustible around when weld the dooryard, ground and wall,.
˜The wire connection of base metal should be as close to the welding place as possible.
˜Never weld those facilities with gas pipe or airtight slot.
˜Put fire extinguisher around the welding area to prevent fire.
The gas and fumes are harmful to health, please wear protective device
according to regulations.
˜Wear exhaust equipment and breathe preventive facilities to prevent gas poisoning or choke.
˜Use suggested part exhaust equipment and breathe preventive facilities to prevent hurt or
poisoning by gas and other powder, please.
˜To prevent oxygen-deficiency, air out the gas-filled room which is full of CO2and argon on the
bottom, When operating on trunks, boilers, cabins, etc.
˜Please accept the supervisor’s inspection when operating in narrow space. Air the room and
wear breathe preventive facilities.
˜Never operate in degrease, washing or spray space.
˜Using breathe preventive facilities when weld shielded steel for it will cause poisonous dust
and gas.
The arc, spark, residue and noise are harmful to health, please wear
protective appliance.
˜Eye protection against arc is recommended when welding or supervise welding.
˜Please wear preventive spectacles.
˜Welder’s gloves, welder’s goggles, long sleeve clothes, leather apron, and other standard
protection equipments must be worn for welding operation.
˜A screen to protect other people against the arc must be set in the welding place.

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Please follow the notes below to avoid gas cylinder toppling over or
broken.
˜Use the gas cylinder correctly.
˜Use the equipped or recommended gaseous regulator.
˜Read the manual of gaseous regulator carefully before using it, and pay attention to the safety
notes.
˜Fix the gas cylinder with appropriative holder and other relative parts.
˜Never put the cylinder under high temperature or sunshine environment.
˜Keep your face away from the gas cylinder exit when opening it.
˜Put on the gas shield when it is not used.
˜Never put the torch on the gas cylinder. The electrode can not meet the gas cylinder.
Any touch of the switch part will cause injury, please note the
following.
˜Never use the machine when the enclosure is off.
˜Install, operate, check and maintain the machine by professional person.
˜Keep your fingers, hair, clothes etc. away from the switch parts such as the fan.
The wire end may deal damage, please note the following.
˜Never look into the electric conduction hole when checking the wire feeding is normal or not, ,
or the shooting wire may stab your eyes and face.
˜Keep your eyes, face or other naked parts away from the end of torch when feeding the wire
manually or pressing the switch.
For better work efficiency and power source maintenance, please
note the following.
˜Precautions against toppling over.
˜Never use the welding equipment for pipe thawing.
˜Lift the power source from side when use the up-down forklift truck to avoid toppling over.
˜When using the crane for lift, tie the rope to the ears with an angle no more than φ15 to the
vertical direction.
˜When lifting the welding machine which equipped with gas cylinder and wire feeder, download

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them from the power source and ensure the horizontal of the machine. Do fix the gas cylinder
with belt or chain when moving it to avoid body hurt.
˜Ensure fastness and insulation when lifting the wire feeder through the swing ring for welding.
Electromagnetic interference needing attention.
˜It may need extra preventive measures when the equipment is used in particular location.
˜Before the installation, please estimate the potential electromagnetism problems of the
environment as follows.
a) Upper and lower parts of the welding equipments and other nearby power cable, control
cable, signal cable and phone cable.
b) Wireless electric as well as TV radiation and reception equipment.
c) Computer and other control equipments.
d) Safety-recognition equipment etc. Such as supervise of industrial equipments.
e) Health of people around. Such as personnel using the heart pacemaker or audiphone.
f) Equipments for adjustment and measurement.
g) Anti-disturb capability of other used equipments .Users should ensure these equipments
and the environment are compatible, which may need extra preventive measures.
h) Practical state of the welding and other activities.
˜Users should observe the following dos and don’ts to decrease radiation interference.
a) Connect the welding equipments to the power supply lines.
b) Maintain the welding equipments regularly.
c) The cable should be short enough to be close to each other and the ground.
d) Ensure the safety of all the welding metal parts and other parts nearby.
e) The workpiece should be well earth.
f) Shield or protect the other cable and equipments to decrease the effects of disturbances.
The welding equipments can be complete shielded in some special conditions.
˜Users are responsible for interference due to welding.