Rilon MIG/NBC 300GN User manual

USER MANUAL
MIG/NBC 300GN

CONTENTS
1. SAFETY WARNING 2
2. PRODUCT DESCRIPTION 6
3. TECHNICAL PARAMETERS 7
4. INSTALLATION INSTRUCTION 8
5. PANEL FUNCTION ILLUSTRATION 10
6. OPERATION PARAMETER RECOMMENDATION 12
7. STRUCTURE CHART AND MAJOR PART LIST 14
8. CIRCUIT DIAGRAM 16
9. ATTENTIONS PREVENTIVE MEASURES 17
10. POTENTIAL OPERATING PROBLEMS 18
11. DAILY MAINTENANCE 19
12. TROUBLESHOOTING AND FAULT FINDING 20
13. INITIAL PROBLEMS DIAGNOSE 21
14. DAILY CHECKING 23
USER MANUAL 1 YF-20Y A1

SAFETY WARNING
● Please read this manual carefull before using it.
● The safet notes listed in this manual is to ensure correct use of the machine and to keep ou and other people from
being hurt.
● The machine is safet considered designed, please refer to the safet warning listed in the manual when using it in
case of bad accidents.
● Wrong use of the machine will cause different extent of hurt as follows, and there will be warning sign and description
for remind.
Warning sign Description Meaning
High-danger “High-danger” means there is possibilit of severe dangerous, and ma cause
dead if not avoid. This sign is used in extreme case, which is normall related to
bod dangerous neither than propert loss.
Danger “Danger” means there is possibilit of dangerous situation, and ma cause badl
hurt if not avoid. It can also refer to propert loss.
Notes This means it ma cause bod hurt if not avoid. Please refer to the related
description when this sign occurred.
Danger! Please follow the rules below in case of bad accidents:
1． Do not use the machine in none-welding areas.
2． The machine is safet considered designed, please do read the warning notes carefull in case of dead or other bad
accidents.
3． Follow related regulations for the construction of the input drive force, selection of the setup place, usage of the high-
pressure gas, storage and configuration, safe-keeping of the workpiece after welding and management of the offal
etc.
4． No entr of unrelated person to the welding area.
5． People using heart pacemaker cannot get close to the welding machine and area without the doctor’s permit. The
magnetism caused when connecting the machine will cause influence to the pacemaker.
6． Ask profession person to install, check and maintain the machine.
7． Please correctl understand the contents of this manual to ensure safet , and ask those professional people with
safet knowledge and technique to operate the machine.
Danger! Please follow the rules below in case of electric shock:
＊Any contact of electric parts may cause fatal electric shock or burnt.
1. Don’t touch an electric parts.
2. Ask professional person to connect the machine and workpiece to the ground.
3. Cut off the power box before the installation or checking, and restart after 5 minutes. For the capacitance is
chargeable, please ensure it has no voltage before restart even if the power source is cut off.
4. Do not use cable without enough section or with worn-out cover or broken conductor.
5. Do ensure insulation at the cable joint parts.
6. Do not use the machine when the housing is off.
USER MANUAL 2 YF-20Y A1

7. Do not use broken or wet insulation gloves.
8. Use safet net when work at high position.
9. Check and maintain regularl , don’t use it until the broken parts are fixed well.
10．Cut off all the input power when not use.
11 ．Follow the national or local related standard and regulations when using the AC/DC machine at narrow or high
position.
Danger! Please use preventive measures to avoid gas and fumes.
＊Gas and fumes are harmful to health.
＊It may cause choke when operate in narrow space.
1． In case of accidents like gas poisoning or choke, please use suggested exhaust equipment and breathe preventive
facilities.
2． In case of hurt and poisoning b gas and other powder, please use suggested part exhaust equipment and breathe
preventive facilities.
3．When operated on trunks, boilers, cabins etc.,the CO2 and argon gas will sta in the bottom. Please replace gas
sufficientl and use gas respire facilities in case of ox gen shortage.
4．Please accept the supervisor’s check when operate in narrow space, and ensure enough gas suppl and use breathe
preventive facilities.
5．Do not weld in degrease, washing and spra space.
6．Use breathe preventive facilities as it will cause poisonous dust and gas when weld shielded steel.
Danger! Please follow the below notes to avoid accidents like fire and explode:
＊Spark and hot workpiece can cause fire.
＊It may cause fire if the cable is not connected well or when the current circuit of the steel or
other workpiece are not connected completely.
＊Do not weld on the case of tinder stuff, or it may cause explode.
＊Do not weld airtight containers such as slot, pipe etc., or may break.
1．Do not put tinder stuff in welding area.
2．Do not weld around tinder gas.
3．Do not put heat workpiece near the tinder stuff.
4．When weld the door ard, ground and wall, do move awa the tinder stuff around.
5．The cable joint place should be insulated.
6．The cable joint of the workpiece should be close enough to the welding place.
7．Do not weld those facilities with gas pipe or airtight slot.
8．Put fire extinguisher around the welding area in case of fire.
Notes! Please wear protective appliance to avoid arc, spark, residue and noise.
＊ Arc ray can cause eye inflammation or skin burnt.
＊Spark and residue will burn your eyes and skin.
1． When welding or supervise welding, please use preventive facilities with enough shielding.
2． Please wear preventive glasses.
3． Please wear preventive facilities such as leather gloves, coat, foot-safeguard and apron.
4．Set preventive shield screen around the welding area to protect other people from harmful arc ra s.
Notes! Please follow the below notes to avoid gas cylinder toppling over or broken.
USER MANUAL 3 YF-20Y A1

＊Toppling over of the gas cylinder will cause body hurt.
＊ Wrong use of the gas cylinder will lead to high-pressure gas eruption and cause human hurt.
1．Use the gas c linder correctl .
2．Use the equipped or recommended gas adjustment.
3．Read the manual of the gas adjustment carefull before using it, and pa attention to the safet notes.
4．Fix the gas c linder with appropriate holder and other relative parts.
5．Do not put the c linder under high temperature and sunshine.
6．Do not put our face close to the gas c linder exit when opening it.
7．Put on the gas shield when not use.
8．Do not put the torch on the gas c linder or touch the electrode.
Notes! Any touch of the switch part will cause injury, please pay attention to the below
notes:
＊ Do not put fingers, hair, clothes etc. near to the moving parts such as the fan.
1．Do not use the machine when the housing is off.
2．Ask professional person to install, operate, check and maintain the machine.
3．Do not put fingers, hair, clothes etc. near to the switch parts such as the fan.
Notes! Follow the below note as the wire end may cause body hurt:
＊The wire shoot out from the torch can stab eyes, face and other naked parts.
1．Before feeding the wire, do not look into the electric conduction hole, or the wire shooted out ma stab our e es and
face.
2．When feeding the wire manuall or press the torch, do not put the torch end near to our e es, face and other naked
parts.
Notes! Follow the below notes to ensure better work efficiency and power source:
＊No person under of in front of the machine when swing in case of injury!
1. Precautions against toppling over.
2．Warning against the use of welding power source for pipe thawing.
3．Lift the power source from two sides when use the up-down forklift truck in case of toppling over.
4．When using the crane for lift, tie the rope to the ears with an angle no more than φ15 to the vertical direction.
5．If the machine is equipped with gas c linder and wire feeder, download them from the power source and ensure the
horizontal of the machine. Do fix the gas c linder with gallus or chain when moving it in case of bod hurt.
6．Ensure fastness and insulation when using the swing ring to lift the wire feeder in welding.
7．If the machine is equipped with gallus or handles, the are onl for hands not for crane, fork-lift truck or other swing
equipments.
USER MANUAL 4 YF-20Y A1

Lifting wa for gas shielded machines
Notes for electromagnetism disturb:
1. It ma need extra preventive measures when the power is used in some partial space.
2. Before the installation, please estimate the potential electromagnetism problems of the environment as follows:
a)Upper and down parts of the welding equipments and other nearb 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)Safet -recognition equipment etc. Eg: supervise of industrial equipments.
e) Health conditions of the people around. Eg: use of the heart pacemaker and audiphone.
f) Equipments for adjustment and measurement.
g) Anti-disturb capabilit of other used equipments .Users should ensure these equipments and the environment are
compatible, and this ma need extra preventive measures.
h) Practical state of the welding and other activities.
3. Users should follow the below notes to decrease radiation disturb:
a) Connect the welding equipments to the power suppl lines.
b) Maintain the welding equipments regularl .
c) The cable should be short enough to be close to each other and near to the ground.
d) Ensure the safet of all the metal parts and other parts nearb .
e) The workpiece should be well connected to the ground.
f) Shield or protect the other cable and equipments to decrease the influence of disturb. The welding equipments can be
full shielded under special conditions.
4. Users are responsible for the disturb problems caused b welding.
USER MANUAL 5 YF-20Y A1
Correct False

PRODUCT DESCRIPTION
The welding machine applies the most advanced inversion technolog in the world.
The principle of inversion is to transform the power frequenc of 50Hz/60Hz into direct current and invert it into high
frequenc through high-power device IGBT, then perform voltage-drop and commutation with the output high-power D.C
power suppl via Pulse Width Modulation (PWM). Since the switch power inversion technolog is adopted, the weight
and volume decrease greatl while the conversion efficienc increase b more than 30% 。Its characteristics are: stable
wire feed rate, little splatter, portable, energ -saving, low electromagnetic noise.
Our CO2 gas shielded welding machine is equipped with unique electronic reactor circuit, which can precisel control the
short-circuiting transfer and mixed transfer resulted in better performance than other machines. Compared with silicon
controlled welding machine and tapped welding, our products have the following advantages: stable wire feed rate,
portable, energ -saving, electromagnetic noise free. Besides, our products spatter less, easier arc starting, deep welding
pool, high dut c cle etc. With high efficienc and energ -saving features, this equipment is applicable in large-scale
plants such as ship ards, steel structure plants etc..
Thank our for choosing our products. Please feel free to propose our valuable suggestions; we will make efforts to
perfect our products and service.
WARNING！
The machine is mainly used for industrial purpose. It will cause radio interference indoor, operators
shall take fully preventative measures.
USER MANUAL 6 YF-20Y A1

TECHNICAL PARAMETERS
Type
Item
MIG/NBC 300GN
Power voltage (V) 3 phase 400V±15%
Frequenc (Hz) 50/60
Rated input current (A) MIG :18.5
MMA :20.5
Output current adjustment (A) MIG :50-300
MMA :70-300
Output voltage (V) MIG :16.5-29
MMA :22.4-32
Dut c cle (%) MIG (35%)
MMA (20%)
Power factor 0.85
Efficienc (%) 85
T pe of wire feeder Internal
Wire feed speed (m/min) 3-16
Post flow time (S) 1.0±0.5
Welding-wire diameter (mm) 0.8/1.0/1.2
Insulation grade F
Housing protection grade IP21
Welding thickness (mm) More than 0.8
Weight (kg) 60
Overall dimension (mm) 595*275*520
USER MANUAL 7 YF-20Y A1

INSTALLATION INSTRUCTION
The welding equipment is equipped with power voltage compensation device. It keeps the machine work normall when
power voltage fluctuating ±15% of rated voltage.
When using long cable, in order to reduce voltage drop, big section cable is suggested. If the cable is too long, it will
affect the performance of arcing and other s stem function, it is suggested to use the recommend length.
1. Make sure the intake of the machine is not covered or blocked to avoid the malfunction of the cooling s stem.
2. Use ground cable whose section no less than 6mm2 to connect the housing and earth. The method is to connect the
grounded interface in the back to the earth device, or make sure the earth end of power interface has been reliabl
and independentl grounded. Both wa s can be used together for better securit .
Installation Procedures：
1) Connect the gas c linder with CO2 decompression flow mete tightl to CO2 mouth behind the machine via air tube.
2) Insert the swift plug of earth cable into socket at the front panel.
3) Set the wire wheel with wire on the wheel axis, the wheel hole should be matched with the wheel fixer.
4) Choose wire slot according to wire diameter..
5) Loosen the screw of wire-pressing wheel, pit the wire into slot via wire-lead tube, adjust the wire-pressing wheel to
keep wire fix from gliding, but strength should be suitable in case the wire distorts and affects wire sending.
6) Wire roll should turn clockwise rotation to let out wire, to prevent wire from gliding; wire is usuall set to the fixed hole
on the wheel side. To prevent the bent wire from getting stuck, please cut off this part of the wire.
7) Put and tighten the torch on the output socket and put the wire into the torch b hand.
This procedure must be operated by electrician!
Connect proper power cable to the distribution box with corresponding capacit according to the input voltage and
current (See technical parameter table). Do not connect to the inappropriate voltage and make sure that the difference of
power suppl is within permitted range.
USER MANUAL 8 YF-20Y A1

Explanatory drawing for Installation of MIG/NBC 300GN:
Notes: Turn the welding machine to MMA mode for heating the gas cylinder to prevent CO2 meter
icing when the machine is not working under MIG mode.
USER MANUAL 9 YF-20Y A1
CO2 meter
Power supply
Three phase~AC400V
Workpiece
Welding gun
Gas cylinder
Earth clamp

PANEL FUNCTION ILLUSTRATION
Front panel instruction：
1. Current adjustment button
2. Arc trait adjustment button
3. MMA/MIG switch button
4. 2T/4T switch button
5. Abnormal indicator
6. Current meter
7. Remove control indicator
8. Voltage meter
9. Voltage adjustment button
10. Negative output terminal
11. Positive output terminal
12. Polarit conversion joint
13. Torch joint
USER MANUAL 10 YF-20Y A0

1. Change-over button
1) MMA/MIG change-over button: the machine is under MIG mode as defaulted when it is turn on, and the MIG
indicator is on. Press the MMA/MIG button, it it changed to MMA mode. It is turned back to MIG b repeat the step
above. (The following buttons cannot work under MMA mode).
2) Wire check/weld/gas check change-over button: turn the switch to GAS CHECK position, the electromagnetism
valve move and there will be gas running; turn the button to WIRE position, the wire feeder will be on wire checking
state and begins to feed wire rapidl , on the WELD position, the machine can work normall .
3) 2T/4T change-over button: the machine is under 2T mode as defaulted when it is turn on. Press the 2T/4T
change-over button, it is changed to 4T mode. Turn it back to 2T b repeat the step above.
2. Adjustment button
1) Voltage adjustment: adjust the range of output voltage..
2) Current adjustment: adjust the range of output current.
3) Electric arc characteristic: adjust the soft/hard range of the electric arc, to achieve perfect welding result.
3. Polarity conversion joint
This machine has the polarit conversion; There are positive output terminal and negative output terminal between
wire feeder and wire spool; When use solid wire with gas protection, torch socket should be connected to the positive
output terminal, ground cable should be connected to the negative output terminal; When use flux-cored wire, the two
connected cable should be exchanged.
USER MANUAL 11 YF-20Y A1

OPERATION PARAMETER RECOMMENDATION
The values listed in the following table are the general specification values under standard condition.
Plate
thickness
(mm)
Wire
diameter
(mm)
Interval
(mm)
Current
(A)
Voltage
(V)
Welding
speed
(cm/min)
Wire
extension
(mm)
Gas flow
rate
(L/min)
I Square butt welding Low welding speed
0.8 0.8,0.9 0 60～70 16～16.5 50～60 10 10
1.0 0.8,0.9 0 75～85 17～17.5 50～60 10 10～15
1.2 0.8,0.9 0 80～90 16～16.5 50～60 10 10～15
1.6 0.8,0.9 0 95～105 17～18 45～50 10 10～15
2.0 1.0,1.2 0～0.5 110～120 18～19 45～50 10 10～15
2.3 1.0,1.2 0.5～1.0 120～130 19～19.5 45～50 10 10～15
3.2 1.0,1.2 1.0～1.2 140～150 20～21 45～50 10～15 10～15
1.0,1.2 1.0～1.5 160～180 22～23 45～50 15 15
1.2 1.2～1.6 220～260 24～26 45～50 15 15～20
1.2 1.2～1.6 220～260 24～26 45～50 15 15～20
1.2 1.2～1.6 300～340 32～34 45～50 15 15～20
1.2 1.2～1.6 300～340 32～34 45～50 15 15～20
High welding speed
0.8 0.8,0.9 0 100 17 130 10 15
1.0 0.8,0.9 0 110 17．5 130 10 15
1.2 0.8,0.9 0 120 18．5 130 10 15
1.6 1.0,1.2 0 180 19．5 130 10 15
2.0 1.0,1.2 0 200 21 100 15 15
2.3 1.0,1.2 0 220 23 120 15 20
3.2 1.2 0 260 26 120 15 20
Plate
thickness
(mm)
Wire
diameter
(mm)
Current
(A)
Voltage
(V)
Welding
speed
(cm/min)
Wire
extension
(mm)
Gas flow
rate
(L/min)
Fillet butt welding
1.6 0.8,0.9 60～80 16～17 40～50 10 10
2.3 0.8,0.9 80～100 19～20 40～55 10 10～15
3.2 1.0,1.2 120～160 20～22 35～45 10～15 10～15
4.5
1.0,1.2
150～180 21～23 30～40 10～15 20～25
USER MANUAL 12 YF-20Y A1

Plate
thickness
(mm)
Wire
diameter
(mm)
Welding
gun
vertical
angle(°)
Current
(A)
Voltage
(V)
Welding
speed
(cm/min)
Wire
extension
(mm)
Gas flow
rate
(L/min)
Horizontal fillet butt welding T joint
Low welding speed
1.0
0.8,0.9 450 70～80 17～18 50～60 10 10～15
1.2 0.9,1.0 450 85～90 18～19 50～60 10 10～15
1.6 1.0,1.2 450 100～110 19～20 50～60 10 10～15
2 1.0,1.2 450 115～125 19～20 50～60 10 10～15
2.3 1.0,1.2 450 130～140 20～21 50～60 10 10～15
3.2 1.0,1.2 450 150～170 21～22 45～50 15 15～20
4.5 1.0,1.2 450 140～200 22～24 45～50 15 15～20
6 1.2 450 230～260 24～27 45～50 20 15～20
8.9 1.2,1.6 500 270～380 29～35 45～50 25 20～25
12 1.2,1.6 500 400 32～36 35～40 25 20～25
High welding speed
1.0 0.8,0.9 450 140 19～20 160 10 15
1.2 0.8,0.9 450 130～150 19～20 120 10 15
1.6 1.0,1.2 450 180 22～23 120 10 15～20
2 1.2 450 210 24 120 15 20
2.3 1.2 450 230 25 110 20 25
3.2 1.2 450 270 27 110 20 25
4.5 1.2 500 290 30 80 20 25
6 1.2 500 310 33 70 25 25
Low welding speed
Horizontal fillet welding joint
1.2 0.8,0.9 300 80～90 18～19 45～50 10 10～15
1.6 0.8,0.9 300 90～100 19～20 45～50 10 10～15
2.3 0.8,0.9 470 100～130 20～21 45～50 10 10～15
1.0,1.2 470 120～150 20～21 45～50 10 10～15
1.0,1.2 470 150～180 20～22 35～45 10～15 20～25
4.5 1．2 470 200～250 24～26 45～50 10～15 20～25
2．3～3.2 1.2 470 220 24 150 15 15
470 300 26 250 15 15
USER MANUAL 13 YF-20Y A1

STRUCTURE CHART AND MAJOR PART LIST
Structure Chart of MIG/NBC 300GN
USER MANUAL 14 YF-20Y A1

Major parts list of MIG/NBC 300GN
NO. Item Quantit NO. Item Quantit
1Wire check switch 1 29 Discal axis 1
2Erect clapboard 1 30 Heater board 1
3Main control board 1 31 Wire feeder structure 1
4EMC board 1 32 Push/lock button 4
5Horizontal clapboard 1 33 Left upper cover 1
6Fuse seat 1 34 Panel preventive cover 1
7Support of argon c linder 1 35 Panel 1
8Entrance socket 1 36 Front panel 1
9Automatic line-lock button 2 37 Control panel 1
10 Air switch 1 38 Upper plastic panel 1
11 Electromagnetism valve 1 39 Left down cover 1
12 Fan net 1 40 Handle 2
13 Right cover 1 41 Fast socket 2
14 Machine chassis 1 42 Down plastic panel 2
15 Fan 1 43 shunt 1
16 Fan cover 2 44 Radiator connect board 1
17 Upper board 1 45 Negative copper connector 1
18 Copper connector 3 46 Loop transformer 1
19 Bottom board 1 47 Commutate output connector 1
20 Support of bottom board 1 48 Reactor 1
21 upper cover of the tool box 1 49 Radiator(left) 1
22 Right support of the tra 1 50 Radiator(right) 1
23 Right cover of the tool box 1 51 Support of radiator 4
24 tra 1 52 Radiator of commutate bridge 1
25 axis 1 53 Left cover of the tool box 1
26 8"silicon single wheel 2 54 Chassis of the tool box 1
27 Supporting of the front wheels 1 55 Left support of the tra 1
28 4" universal wheel 2
USER MANUAL 15 YF-20Y A1

CIRCUIT DIAGRAM
MIG/NBC 300GN
USER MANUAL 16 YF-20Y A1
CT2
CT1
3
2
1
4
5
6
Main transformer
Output+
Output -
Output reactor
1 2
X2
AC36
Heated board
Diffuser
300A/75m
Input
28:4+4
Gas cylinder heating up
Port
Port
AC380
AC380
AC380
1 2
3 4
5 6
Air switch
PCON1
PCON2
PCON3
PCON5
PCON4
Reactor
1 3
CON1
PCON6
PCON8
CP1
CP2
J1
1 2 4 5
X1
1
2
3
Brachium capa citance
Current transformer
Commutate board
Top board
1
2
3
4
5
CON6
1 2 4 5
CON10
12
43
25*15*12
1 3
CON1
1
3
CON13
1
3
CON3
A
-
+
ire feeder
1
2CON14
1 2
CON7
Electromagnetism valve
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
CON2
12
34
56
78
910
1112
1314
1516
1718
1920
CON1
控制板
Front panel
1 2 3
CON16
1 2
CON5
1 2
CON11
12
Manual switch
12
Thermoswitch
12
ire i nspecting
14.4A
14.4A
14.4A
20A
20A
300A
300A
RN008-03A
1 2 4 5
X1
F a n
D C 5 4 0V
PCO N7
200A/400
200A/400
200A/400
200A/400
472/3K *2
472/3K *2
472/3K *2
15R/10W
472/3K *2
15R/10W
15R/10W
15R/10W
1 2 3 4 5
CON2
EMC board
8A
FUSE

ATTENTIONS PREVENTIVE MEASURES
1. Environment
1）The machine works in environment where air conditions are dr with a dampness level of max 90%.
2）Ambient temperature should be between -10 to 40 degrees centigrade.
3）Avoid welding in sunshine or raining. Avoid water entering the machine
4）Avoid welding in dust area or the environment with corrosive gas.
5）Avoid gas welding in the environment with strong airflow.
2. Safety Checkpoint
Our welding machine has a protection circuit of over voltage, over current and over heat. When voltage, output
current and temperature of machine are exceeding the rated standard, welding machine will stop working
automaticall . Excessive operation under over voltage, over current or over heat ma damage the machine; operator
must pa attention to followings.
1）The working area is adequately ventilated！
The welding machine is medium and small model. But the running of the machine will also generate high
currents, which natural wind circulation cannot satisf its cooling demands. Therefore, each machine has an
internal fan to ensure its stable performance. Make sure the intake is not blocked or covered, there should be
0.3 meter distance from welding machine to objects of environment. User should make sure the working area is
adequatel ventilated. It is important for the performance and the longevit of the machine.
2）Do not over load！
The operator should keep an e e on max dut current (Compared to the selected dut c cle) to make sure that
the machine working current does not exceed max dut c cle current. Over-load current will damage and even
burn the machine.
If machine exceeds standard dut c cle, it ma stop working and switch to protection status. The temperature
control switch is activated b over heat released under this circumstance. Meanwhile, the ellow indicator lights
up. Under this situation, ou do not need to pull out the power plug since the internal fan can work to cool down
the machine. When the ellow indicator stops, the temperature has been lowed down to standard range,
operator is able to starting working again.
3）No over voltage！
Power voltage can be found in diagram of parameters. Automatic compensation circuit of voltage will assure
that welding current keeps is in allowable range. If power voltage is exceeding allowable range limits, it can
damage the components of machine. The operator should understand this situation and take preventive
measures.
4）There is a grounding cable behind welding machine with a mark. Before operation, welding crust must be
grounded reliabl with cable, in order to prevent static electricit , and accidents for electricit leaking.
USER MANUAL 17 YF-20Y A1

POTENTIAL OPERATING PROBLEMS
The phenomenon listed below ma happen due to relevant accessories used, welding material, surroundings and power
suppl . Pleas improve surroundings and avoid these problems..
A. Arc starting difficulty. Arc interruption happens easily:
1) Examine whether grounding wire clamp contacts with the work pieces well.
2) Examine whether each joint has improper contact.
B. The output current fails to reach rated value:
The deviation of power voltage from rated value ma cause that the output current does no accord with adjusted value.
When the power voltage is lower than rated value, the maximum output current ma be lower than rated value.
C. The current can not keep stable during operation:
This situation ma relate to the following factors:
1) The voltage of electric power network changes;
2) Serious interference from electric power network or other electric facilities.
D. Gas vent in welds:
1) Examine whether the gas suppl circuit has leakage.
2) Examine whether there is sundries such as oil, dirt, rust, paint etc. on the surface.
USER MANUAL 18 YF-20Y A1