H&S HSM250 - Page 82

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2
After welding machine
is over-heat, the fan
doesn’t work
Fan damaged
Change it
The cable is loose
Screw the cable tight
3
Press the
gun
switch,
no output
shielded
gas
No output
gas when
test gas
No gas in the gas
cylinder
Change it
Gas hose leaks gas
Change it
Electromagnetic valve
damaged
Change it
Output
gas when
test gas
Control switch damaged
Repair the switch
Control circuit damaged
Check the PCB
4
Wire-feed
er doesn’t
work
Wire reel
doesn’t
work
Motor damaged
Check and change it
Control circuit damaged
Check the PCB
Wire reel
works
The idler roll is loose or
weld wire skids
Adjust tension screws
The drive roll doesn’t fit
with the diameter of
weld wire
Change the roll
Wire reel damaged
Change it
Wire feed pipe is jammed
Repair or change it
Tip is jammed because
of splash
Repair or change it
5
No striking arc and no
output voltage
Output cable is
connected incorrectly or
loosen
Screw it down or change it
Control circuit damaged
Check the circuit
6
Welding stops, and
alarm light is on
Machine has
self-protection
Check over-voltage,
over-current,
over-temperature,
lower-voltage and
over-temperature, and solve it
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
No post-gas
The PCB damaged
Check it