Long-run 200LT User manual

INVERTER DC TIG WELDER
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■
-Non contact arc starting by HIGH FREQUENCY CIRCUIT
- ELECTRIC SHOCK PROTECTOR reduces No load voltage to 14VDC for user safety when welder is
not in use.
-Easy to verify welding current during welding by DIGITAL AMMETER
-Portable by compact size & lightweight
ITEM UNIT 200LT
Rated Input Voltage V 220, Single Phase,
50/60Hz
Process ― TIG STICK
Rated Output Current A 200 150
Input Capacity KVA 7.7 7.1
No Load Voltage V 76
Output Current Range A 10~200 20~150
Output Voltage @ rated output V 19 24
Duty Cycle @ rated output % 40
Dimension (W×D×H) mm 170 * 440 * 290
Weight kg 13

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.․
Plug in a input power cord into a 220V outlet that is grounded.․
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 the gas hose to the gas input terminal.․

Output Connection (Front of the machine)●
Connect the work cable (which is connected to the work clamp) to the METAL terminal.․󺫢
To connect the TIG torch, connect a electrode cable to the TORCH terminal and a torch switch․󺫡
connector to the torch switch receptacle and a gas connector to the output gas receptacle.
Output connection for stick welding●
Connect the work cable (which is connected to the work clamp) to the TORCH terminal.․󺫡
Connect the electrode cable (which is connected to the electrode holder) to the METAL terminal.․󺫢

FRONT PANEL■
1 Up Slope It controls the time to reach to the welding current from the start
current.
2 Ammeter Displays the welding current
3 Welding Current Control Adjust the welding current
4 Down Slope Decreases the current down over a set period. This is used to
eliminate the crater that forms at the end of the weld.
5 Welding Mode Selector Select welding mode

Start Up■
Stick Welding TIG Welding
󺼺 󺼺
Turn On the main power supplied to
welder
Turn On the main power supplied to
welder
󺼺 󺼺
Select "STICK" from the welding mode
selector
Select Crater Off or Crater On or Crater
Repeat or Arc Spot from welding mode
selector
󺼺 󺼺
Turn On the power switch of welder, and
then verify that the power lamp is On and
the cooling fan is running
Adjust properly the down slope time, gas
after-flow time and pulse frequency
󺼺 󺼺
Start to weld with adjusting the proper
welding current Open the valve of gas tank
󺼺
Turn On the power switch of welder, and
then verify that the power lamp is On and
the cooling fan is running
󺼺
Regulate the gas flowed with pressing the
torch switch
󺼺
Start to weld with adjusting the proper
welding current and other parameters

Welding Mode■
Crater Off
Press and hold the torch switch, the machine will open the gas valve to start the flow of the shielding
gas and then the arc is started at welding current. When finish to weld, release the torch switch, then
the arc is off and flow the gas during the gas after-flow time.
Crater On
Press and hold the torch switch, the machine will open the gas valve to start the flow of the shielding
gas and the arc is started at the start current. At this time release the torch switch, the output current
will be increased from the start current to the welding current during the up slope time. When finish to
weld, press and hold the torch switch, the output current will be decreased from the welding current to
the crater current during the down slope time. At this time release the torch switch, the arc is off and
flow the gas during the after-flow time.
TROUBLESHOOTING■
SYMPTOMS REASON RECOMMENDED ACTION
Cooling fan does not work when
the power switch is on.
No input voltage․
Fuse (3A) is blown․
Power switch broke down․
Cooling fan broke down․
Verify input voltage․
Replace Fuse (3A)․
Replace Power switch․
Replace Cooling fan․
Gas does not flow from torch
when pressing the torch switch
Torch switch connector fail․
Torch switch broke down․
Control PCB broke down․
Reconnect Torch switch connector․
Replace Torch․
Replace Control PCB․
Gas flows continuously at "Off"
position of torch switch
Torch switch broke down․
Torch broke down․
Control PCB broke down․
Replace Torch switch․
Replace Torch․
Replace Control PCB․
Arc does not started
Torch cable is broke․
Torch switch connector fail․
Work cable fail․
Torch broke down․
Control PCB broke down․
Repair Torch cable․
Reconnect Torch switch connector․
Reconnect Work cable․
Replace Torch․
Replace Control PCB․
Crater does not work Crater select switch broke down․
Control PCB broke down․
Replace Selector of function․
Replace Control PCB․
. If all recommended action have been checked and the problem persists, please contact our√
service center

200LT PARTS LIST
*Description can be changed by LOT number
NO. PART NAME DESCRIPTION QTY.
1Main PCB WTM-06 1
2Control Transformer 7630 1
3PWD PCB WPD-01 1
4Noise Filter PCB WTF-25 1
5HF PCB TMD-10A65 1
6Condenser 1500UF/400V 1
7Front PCB WTD-25 1
8Selector, Switch SRM143 1
9Solenoid Valve DC24V-2M/M 1
10 Nipple 9/16*1/4 1
11 Connector K20-2R 1
12 Output Terminal 6M/M(RED,BLACK) 2
13 NFB 50A1P 1
14 Nipple 9/16* 6Φ 1
15 Cable Lock PG16 1
16 Temp. Switch N85 1
17 IGBT, PCB LS75A/600V, WIG-02 1
18 Output Diode PCB WDO-08 1
19 Input Bridge Diode / PCB WDB-01 1
20 FAN 120T 1
21 Pilot Surge PCB WNF-01 1
22 Main Transformer 200LT 1
23 Induction Coil 200LT 1
24 Choke Transformer 200LT 1

Thanks for purchasing our machine
Please fill out below form for future reference. This information can be found on the
Nameplate of your machine.
Product Name INVERTER DC TIG WELDER
Model Number LONGRUN 200LT
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]
www.worldwel.com