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15
§5.2 Troubleshooting
All welding machines have undergone 100% inspection before leaving the factory.
Disconnect power cord from LINE before any trouble shooting and only professional
maintenance personal should perform any action on the machine!
Item
Trouble
Reasons
Solution
1
Power switch “ON” but the
power light not illuminated
Breaker open or damaged
Check circuit breaker
Power switch damaged
Replace switch
Power cord damaged
Replace cord
2
Machine over-heat LED
illuminated but fan is not
functioning
Fan damaged
Clear obstruction or replace
The cable is loosen
Secure the cable tightly
3
Depress
trigger
switch, no
output
shielded gas
No output
gas when test
gas
No gas in cylinder or closed
Open valve or fill cylinder
Low gas flow or leaks in
hose and fittings
Adjust regulator flow, secure fittings
Gas solenoid valve problem
Check and replace if required
Output gas
when test gas
Control switch damaged
Repair the switch
Control circuit damaged
Check the board
4
Depress
trigger
switch, no
wire feed
Wire feeder
doesn’t turn
Motor damaged
Check and replace
Control circuit damaged
Check and replace wire feed board
Wire feed
turns but no
wire feed at
nozzle
Welding wire skids over
drive roller wheel
Check tension arm & tighten
Welding wire skids over
drive roller wheel
Confirm roller groove matches wire dia.
Drive roller worn
Replace
Wire won’t feed through
gun with tip removed
Replace torch wire conduit liner
Wire won’t feed through
gun with tip installed
Wrong size or worn contact tip, change
5
No striking arc and no
output voltage
Output cable is connected
incorrectly or loose terminal
Screw it down or change it
Control circuit damaged
Check the circuit
6
Welding stops and over-
temp light illuminates
Machine has reached duty-
cycle limit or internal dust
Stop welding for 10-minutes to allow
cool down. Auto-reset will turn lamp off
7
Welding current is run away
and can be not controlled
The potentiometer damaged
Check or change it
The control circuit damaged
Check the circuit
8
The crater current can be not
adjusted
The PCB damaged
Check it
9
Weld is inconsistent
Inadequate or wrong gas
Change cylinder to correct