amig AMIG-LST Series, Quick Instructions, Page: 35 / 37

32
5-2 Trouble shooting
Note! The flowing troubles and causes are uncertain. However, during the process of MIG Pulse and the
normal using conditions, that might happen.
Trouble
Remedy
No
arc
start No gas
output No
wire
feedi
ng Bad
arc
start Unsta
ble
arc Poor
weldin
g
seam Wire
sticks
with
work
piece Wire
sticks
with
contact
tip Gas
hole
Welding
machine
Distribution
box
(input
protection
device)
1. Switch is off or trips
2. Fuse is broken
3. Connection part is
loose
4. Phase missing ○ ○ ○
Input power
supply cable 1. Cable is broken
2. Connection part (input
part) is loose ○ ○ ○
Welding
machine
operation 1. Circuit breaker is off or
trips
2. 2A fuse in rear panel of
welding machine is
broken ○ ○ ○
Gas
Gas cylinder
and
gas
regulator
1. Gas valve is closed
2. Gas inside of gas
cylinder is not enough
3. Pressure or gas flow
rate is not proper
4. Connection part is
loose ○ ○ ○
Gas feeding
hose 1.Connection part is
loose
2. Gas hose is broken
○ ○
Wire feeder
1. Wire feeding roller,
wire feeding hose:
improper wire standard
2. Not enough pressure
set by pressure handle
3. Wire powder is in wire
feeding hose inlet
4. Improper slow wire
feeding speed ○ ○ ○ ○ ○
Welding
torch
1. Contact tip, nozzle, torch tube is loose
2. Loose connection with wire feeder ○ ○
1. Contact tip, long wire feeding hose:
wrong wire standard, worn, unclean or
deformation ○ ○ ○ ○