TROUBLESHOOTING FOR LINCOLN DURAWELD® 350/500 WELDING MACHINE

TROUBLESHOOTING FOR LINCOLN DURAWELD® 350/500 WELDING MACHINE

Double Good JSC recommend that customers MUST read carfully user manual before operating welding machine.

In case of troubles during using, follow the recommendations below for troubleshooting. Please contact DOUBLEGOOD JSC – Authorized Service Facility (LASF) for your further support.

PROBLEMS POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
(SYMPTOMS) COURSE OF ACTION
Major Physical or Electrical
Damage is Evident
1. Contact your local Lincoln Electric Authorized Field Service Facility.

Contact DOUBLEGOOD JSC – Authorized Service Facility (LASF)

Phone: +84 28 3816 0283

Hotline: 094 1357 056

Machine not operational – No output. Fan and display not operational. 1. Check the fuse F1 on input circuit Replace control board.
2. Power switch may be faulty. Replace the power switch.
3. Maybe one input phase missing. Check and reconnect
4. Check the three phase input line
voltage at the machine. Input voltage must match the rating plate.
Reconnect
Machine fan and display operational. NO output 1. The remote control panel on LWF wire feeder or trigger of torch trigger is damaged. Check and replace
2. Check for loose or faulty connections at the output terminals and check the lugs connected to the welding and work lead. Reconnect
3. The PC board is faulty or connections are loose. Check and replace.
4. 6 pin control cable is faulty or open circuit. Check and reconnect.
5. The PC board is faulty. Check and replace
The machine has low output and no control. The fan runs. 1. Voltage or current “Pots” on wire
feeder control panel damaged.
Check and replace
2. SCR module is damaged. Replace SCR module.
3. Check for loose or faulty connections at the output terminals. Reconnect.
4. The PC board is faulty. Replace.
5. 6 pin control cable has an open
circuit.
Check and repair
Machine has high output and
no control.
1. Voltage or current “Pots” on wire
feeder control panel damaged.
Repair or replace.
2. Loose or faulty connection with the feedback leads from the shunt and the output terminals to the control board. Reconnect.
3. The PC board is faulty. Replace.
4. 6 pin control cable #94 is faulty or has an open circuit. Check and repair.
Machine does not have maximum output. 1. The “Pots” voltage or current on the remote PWF wire feeder control panel may be damaged. Check and replace.
2. The control board is faulty. Replace.
3. SCR or drive leads may be faulty Check and replace.
Machine does not have 4 Step mode. 1. Welding current feed back circuit
disconnected or reversed.
Reconnect.
2. 2 Step / 4 Step switch is faulty. Check and replace.
Err 36. 1. Overheating with SCR or Choke. Wait for machine to cool down.
2. Thermostat protection. Fan motor
doesn’t run or runs at low speed.
Change fan motor.
3. Thermostat protection. The
thermostat is damaged.
Change the damaged thermostat. If the damaged thermostat is inside choke, change the choke
4. Temperature protection switch is
Open Circuit.
Check and correct.
“Err 49” on the display. 1. Phase detection error. At least one phase lost. Check and rectify
2. Main contactor is faulty. Check and replace.
“Err 81” on the display 1. Motor over current error Find out reason which caused over
current and remove it.
2. Blockage in feeding liner. Clean or replace.
3. Wrong drive roll. Check or replace
“Err 23” on the display. 1.Wrong telecommunication Wrong telecommunication among chips on PCB
“Err 41” on the display 1. Over current. Trigger release.
Machine will NOT shut off. 1. Contactor is faulty Repair.
Contact DOUBLEGOOD., JSC – Authorized Service Facility (LASF)
Meter reading is incorrect. 1. PC board is faulty Check and replace.
2. Loose or bad connections on the
feedback leads 220& 221, 222& 223.
Check and correct
3. Loose or faulty connections at the shunt Reconnect
4. Display is faulty. Replace.
Machine will NOT shut off. 1. Contactor is faulty. Repair
Contact DOUBLEGOOD., JSC – Authorized Service Facility (LASF)
Welding arc is variable and sluggish. 1. The welding cable connections
are loose or faulty.
Check and reconnect.
2. Make sure the wire feed speed,
voltage, and shielding gas are correct for the process being used.
Check and correct
3. The PC board is faulty. Replace
4. Bad connection of the input cable. Check and correct
Arc starts are poor. 1. Bad grounding connection. Check and reconnect
2. There is oil on the surface of the
workpiece.
Check and replace.
3. Output voltage is abnormal. Check whether the open circuit voltage is normal.
4. The welding parameters are not
correct, the WFS is too fast, the voltage is low.
Readjust the welding parameters.