Worldwel 350LC2 User manual

INVERTER CO2/MAG WELDER
350LC2, 500LC, 600LC2
OPERATION MANUAL
DO NOT INSTALL, OPERATE OR MAINTAIN THIS MACHINE WITHOUT READING THIS
MANUAL AND PLEASE ALWAYS THINK BEFORE YOU ACT.
www.worldwel.com

TECHNICAL SPECIFICATIONS■
- Built in volume for adjusting wire feeding speed when no load
- Saving input capacity by inverter circuit using quality IGBT
- Usable at any plant by easy to change input voltage 220V, 380V, 440V
- Easy to verify output by digital ammeter and voltmeter during welding
ITEM UNIT 350LC2 500LC 600LC2
Input Voltage V 220V, 380V, 440V
Single Phase/Three Phase
Frequency Hz 50/60
Rated Output Current A 350 500 600
Input Capacity @ rated
output
220V
KVA 15 20 32.4380V
440V
No Load Voltage V 62 @ 380V 76 @ 380V
Output Current Range A 50 ~ 350 50 ~ 500 50 ~ 600
Output Voltage Range V 16 ~ 35 16 ~ 40 16 ~ 44
Duty Cycle @ rated output % 60
Dimension (W×D×H) mm 330 × 685 × 530 385 × 765 × 610
Weight kg 39 61 66

General Safe Practices
Wear approved safety glasses with side shields under your welding helmet or face shield and at all■
times in the work area.
When working above floor level, use a safety belt to protect yourself from a fall should you get a■
shock.
Do not install or place machine on or over combustible surfaces.■
Be sure that all installation, operation, maintenance and repair procedures are performed only by■
qualified persons.
Electric shock can kill.
Wear Dry, hole-free insulating gloves and body protection. Do not touch electrode with bare hand.■
Do not wear wet or damaged gloves.
Do not touch live electrical parts.■
Never dip the electrode in water for cooling.■
Properly install and ground all equipment.■
Protect yourself from electric shock by insulating yourself from work and ground.■
Use non-flammable, dry insulating material if possible, or use dry rubber mats, dry wood or
plywood, or other dry insulating material big enough to cover your full area of contact with the
work or ground, and watch for fire.
Turn off input power using the disconnect switch at the fuse box before working on the equipment.■
Frequently inspect input power cord for damage or bare wiring and repair or replace cord■
immediately if damaged.
Fumes and gases can be dangerous.
Welding may produce fumes and gases hazardous to health. Avoid breathing these fumes and■
gases. When welding, keep your head out of the fume. Use enough ventilation and/or exhaust at
the arc to keep fumes and gases away from the breathing zone.
Use enough forced ventilation or local exhaust (forced suction) at the arc to remove the fumes■
from your breathing area.
Use a ventilating fan to remove the fumes from the breathing zone and welding area.■
Arc rays can burn eyes and skin.
Use welding helmet with correct shade of filter to protect your eyes from sparks and the rays of the■
arc.
Wear welders cap and safety glasses with side shields. Use ear protection when welding out of■
position or in confined spaces. Button shirt collar.
Wear complete body protection. Wear oil-free protective clothing such as leather gloves, heavy■
shirt, cuffless pants and high boots.

Welding sparks can cause fire or explosion.
Remove fire hazards from the welding area. If this is not possible, cover them to prevent the■
welding sparks from starting a fire. Remember that welding sparks and hot materials from welding
can easily go through small cracks and opening to adjacent areas. Avoid welding near hydraulic
lines.
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.
Do not weld on drums, tanks, or any closed containers unless a qualified person has tested it and■
declared it or prepared it to be safe.
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
circuits. This can create fire hazards or overheat lifting chains or cables until they fail.
INSTALLATION■
The welding machine shall be installed at a place ;●
free from the inflammables․
less humidity, dirt and dust․
protecting from influence of direct sunlight, wind and rain․
not generated oil vapor and corrosive gas․
operating temperature range is from -10 to 40℃ ℃․
least 30 away from wall and other welding machine㎝․
Input Connection (Rear of the machine)●
Be sure the voltage, phase and frequency of the input power is as specified on the name plate
located on the rear panel of the machine.
To connect the power cables, turn the power switch OFF․
Verify the voltage to be supplied from main power.․
Open the cover of terminal plate and connect the power cable to the power input terminal on the rear․
of the machine and close the cover of terminal plate.
If the input power is single phase, connect two cables on left and right terminal without center.√
For grounding the machine, connect a ground wire to the ground terminal marked with the symbol is․
located on the rear panel of the machine.

Input voltage selection※
220V 380V 440V
To connect the power cables, turn the power switch OFF․
Verify the voltage to be supplied from main power.․
․Verify the connection of voltage selection switch. If necessary to change it, remove the
cover of voltage selection switch and turn the switch to correct voltage to be
supplied from main power. Close the cover.
Open the cover of terminal and connect the power cable to the power input terminal on․
the rear of the machine and close the cover of terminal. For grounding the machine,
connect a ground wire to the ground terminal marked with the symbol is located on the
rear panel of the machine.
Connect a power cord of gas regulator to the 110V outlet on rear of the machine.․
Output Connection (Front of the machine)●
Connect the work cable to the " METAL" terminal.․󺫡
To connect the Wire feeder, connect a electrode cable from wire feeder to the " TORCH" terminal and․󺫢
a Remote control cable from the wire feeder to the "REMOTE CONTROL" receptacle.
Install a gas regulator on a gas tank and connect a gas hose of extension cable from wire feeder to the․
gas regulator on gas tank.
CO2Torch connection to wire feeder
Connect a wire feeding cable of torch to the wire feeding cable receptacle of wire feeder.․
Connect a torch switch connector of torch to the torch switch receptacle of wire feeder.․
Connect a gas hose of torch to the gas hose receptacle of wire feeder.․
․Verify the connection of voltage selection terminal.
If necessary to change it,√
Remove the cover of input voltage selection plate.․
Position the wires for the voltage to be supplied from main power.․
For 380V and 440V input, position a switch for the voltage would be used which is rear.․

<MIG/MAG> <STICK WELDING>

FRONT PANEL■
1Power Switch When it is turn on, the cooling fan and all of electrical circuit inside the
machine will be operated.
2Power Lamp It indicates that the machine is on and input voltage is within acceptable
range.
3Warning Lamp
It indicates the thermal over load or output disabled by any electrical
problems or the failure of program. When it is on, the machine will not
supply power at the output.
4Ammeter indicates the welding current
5Voltmeter indicates the welding voltage
6Crater Voltage Volume Adjust the crater voltage
7Crater Current Volume Adjust the crater current
8Arc character Adjusting volume Adjust the depth, height and width of welding bead
9Function Gas check, Crater On, Crater Off, STICK (MODEL : 600LC2)
10 Control Fuse (5A) It will be broken by any electrical problems
11 Motor Fuse (10A) It will be broken by motor problem of wire feeder
12 STICK Weld Current Volume Adjust the current on stick welding (MODEL : 600LC2)

CRATER SELECTION■
CRATER OFF Press and hold the torch switch, the arc is started at the welding current. When finish
to weld, just release the torch switch.
CRATER ON
Press and hold the torch switch, the arc is started at the welding current. At this time
release the torch switch, the arc is not stopped. When finish to weld, press and hold
the torch switch, the output current will be decreased from the welding current to the
crater current. At this time release the torch switch, the arc is turn off.
①Welding current
②Crater current

START UP■
Verify the voltage to be supplied from main power and turn on main power
󺼺
Position the crater switch to CRATER OFF or CRATER ON
󺼺
Position the wire diameter selection switch to 1.2 or 1.6∅ ∅
󺼺
Position the wire selection switch to Solid or Flux
󺼺
Position the adjusting method selection switch to Auto or Individual
󺼺
Turn on the power switch of machine and then verify that the cooling fan is running.
󺼺
Position the GAS CHECK switch to "GAS CHECK" and adjust the volume of flowing gas by the gas
regulator. When start to weld, position to "WELD".
󺼺
The welding wire is positioned at end of torch tip by pressing the inching switch of wire feeder for
starting.
󺼺
Start to weld with adjusting the welding voltage and current of wire feeder and crater voltage, current
and arc character if necessary.

TROUBLESHOOTING■
SYMPTOMS REASON RECOMMENDED ACTION
Cooling fan does not operate when
turn on the power switch.
Input voltage fail.․
Broken Fuse(5A).․
Broken Power switch.․
Broken Cooling fan.․
Verify input voltage.․
Replace Fuse(5A).․
Replace Power switch.․
Replace Cooling fan.․
Welding
wire does
not go out
from wire
feeder.
Welding wire does not
go out when press the
inching switch of wire
feeder.
Broken Fuse(10A).․
Wire feeding cable does not connected perfectly.․
Broken motor of wire feeder.․
Broken Control PCB.․
Replace Fuse(10A).․
Reconnect Wire feeding cable․
of torch.
Replace Motor of wire feeder.․
Replace Control PCB.․
Wire feeding has no
problem when press
the inching switch, but
Welding wire does not
go out from wire
feeder when press the
torch switch.
Torch switch connector does not connected․
perfectly.
Broken Torch switch.․
Broken Control PCB.․
Reconnect Torch switch․
connector.
Replace Torch.․
Replace Control PCB.․
Gas does
not flow
from torch
Gas does not flow
from torch when switch
is "GAS CHECK"
position.
Close the valve of gas tank.․
Broken Gas check switch.․
Open the valve of gas tank.․
Replace Gas check switch.․
Gas does not flow
from torch when press
the torch switch.
Torch switch connector does not connected․
perfectly.
Broken Torch switch.․
Broken Control PCB.․
Reconnect Torch switch․
connector.
Replace Torch.․
Replace Control PCB.․
Gas flows continuously at "WELDING"
position of GAS CHECK switch.
Broken GAS CHECK switch.․
Broken Torch.․
Broken Control PCB.․
Replace GAS CHECK switch.․
Replace Torch.․
Replace Control PCB.․
Fail to adjust the welding voltage and
current on the wire feeder.
Remote control connectors of wire feeder does․
not connected perfectly.
Broken Volume Knob.․
Broken Control PCB.․
Reconnect Remote control․
connectors of wire feeder.
Replace Volume Knob.․
Replace Control PCB.․
Arc does not started.
Broken Torch cable.․
Torch switch connector does not connected․
perfectly.
Work cable does not connected perfectly.․
Broken Torch.․
Broken Control PCB.․
Repair Torch cable.․
Reconnect Torch switch․
connector.
Reconnect Work cable.․
Replace Torch.․
Replace Control PCB.․
Crater does not work. Broken Crater select switch.․
Broken Control PCB.․
․Contact our service center
If all recommended action have been checked and the problem persists, please contact our√
service center

350LC2 PARTS LIST
*Description can be changed by LOT number
NO. PART NAME DESCRIPTION QTY.
1 Main PCB WCOM-10(Main) 1
2 Control Transformer CO2-11464 1
3 Control Transformer CO2-4818 1
4 PWM PCB WCOM-10(Drive) 1
5 Control Transformer PCB VAC-02 1
6 NFB 3P-80A NDB3-100J4 80/3LTS 1
7 META PCB Meta PCB 1
8 FRONT PCB Meta PCB 1
9 Selector Switch XK5378 1
10 Fuse(Power) 5A 1
10 Fuse(Moter) 10A 1
10 Fuse(Back) 3A 1
11 MF Condensor 10 /800V㎌2
12 MF Condensor 15 /800V㎌4
13 Condensor 2200UF/400V 2
14 Cap Switch SZW6-63 1
15 Terminal 6M/M 1
16 Plug HS-002[110V] 1
17 FAN 120T 2
18 FAN 150T 1
19 Input Bridge Diode DF75LA80 1
20 IGBT 150A/600V 2
21 IGBT Snubber PCB WIS-03 2
22 Temp. Switch N85 1
23 Output Diode 300A/600V 2
24 Ceramic Condensor 20W10Ω2
25 Nipple 9/16*1/4 1
26 Nipple 9/16* 6Φ1
27 Terminal MID 2
28 Connector 3102A 20-16(S) 1
29 Surge PCB WBP-03 1
30 Main Transformer 350LC 1
31 Choke Transformer 350LC 1

500LC PARTS LIST
*Description can be changed by LOT number
NO. PART NAME DESCRIPTION QTY.
1 Main PCB WCOM-10(Main) 1
2 Control Transformer CO2-11464 1
3 Control Transformer CO2-4818 1
4 PWM PCB WCOM-10(Drive) 1
5 Control Transformer PCB VAC-02 1
6 NFB 3P-80A NDB3-100J4 80/3LTS 1
7 META PCB Meta PCB 1
8 FRONT PCB Meta PCB 1
9 Selector Switch XK5378 1
10 Fuse(Power,Back) 5A 2
10 Fuse(Moter) 10A 1
11 MF Condensor 10 /800V㎌2
12 MF Condensor 20 /800V㎌4
13 Condensor 2700UF/400V 2
14 Cap Switch SZW6-63 1
15 Terminal 6M/M 1
16 Plug HS-002[110V] 1
17 FAN 120T 2
18 FAN 150T 1
19 Input Bridge Diode DF100LA80 1
20 IGBT 200A/600V 2
21 IGBT Snubber PCB WIS-05 2
22 Temp. Switch N85 1
23 Output Diode 300A/600V 2
24 Ceramic Condensor 20W10Ω2
25 Nipple 9/16*1/4 1
26 Nipple 9/16* 6Φ1
27 Terminal MID 2
28 Connector 3102A 20-16(S) 1
29 Surge PCB WBP-03 1
30 Main Transformer 500LC 1
31 Choke Transformer 500LC 1

600LC2 PARTS LIST
*Description can be changed by LOT number
NO. PART NAME DESCRIPTION QTY.
1 Main PCB WCOM-10(Main) 1
2 Control Transformer CO2-11464 1
3 Control Transformer CO2-11464 1
4 Control Transformer CO2-4818 1
5 PWM PCB WCOM-10(Drive) 1
6 Control Transformer PCB VAC-02 1
7 NFB 3P-80A NDB3-100J4 80/3LTS 1
8 META PCB Meta PCB 1
9 FRONT PCB Meta PCB 1
10 Selector Switch XK5378 1
11 Fuse(Power,Back) 5A 2
11 Fuse(Moter) 10A 1
12 MF Condensor 10 /800V㎌2
13 MF Condensor 20 /800V㎌4
14 Condensor 2700UF/400V 2
15 Cap Switch SZW6-63 1
16 Terminal 6M/M 1
17 Plug HS-002[110V] 1
18 FAN 120T 2
19 FAN 150T 1
20 Input Bridge Diode DF100LA80 1
21 IGBT 200A/600V 2
22 IGBT Snubber PCB WIS-05 2
23 Temp. Switch N85 1
24 Output Diode 300A/600V 2
25 Ceramic Condensor 20W10Ω2
26 Nipple 9/16*1/4 1
27 Nipple 9/16* 6Φ1
28 Terminal MID 2
29 Connector 3102A 20-16(S) 1
30 Surge PCB WBP-03 1
31 Main Transformer 600LC 1
32 Choke Transformer 600LC 1
33 Solenoid Valve DC24V, 3.0Φ1

Thank you very much for choosing our machine
Please record your machine identification information below for future reference. This
information can be found on the nameplate of your machine.
Product Name INVERTER CO2/MAG ARC WELDER
Model Number
Date Manufactured
Serial Number
Date Purchased
Where Purchased
Where you use
Whenever you request replacement parts or information on this machine, always
supply the information you have recorded above. The date number is especially
important when identifying the correct replacement parts.
Complete this form, please fax it to our selling agency in your country or us for
warranty statement.
WORLDWEL CO., LTD.
11-101, Songlim-dong, Dong-gu, Incheon-city, Korea
TEL : [phone] FAX : [phone]
E-mail : [e-mail]
www.worldwel.com