Ronch 250MIG, User Manual

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2
After welding machine is
over-heat, the fan doesn’t
work
Fan damaged Change it
The cable is loosen Screw the cable tightly
3
Press the
gun switch,
no output
shielded
gas
No output
gas when
test gas
No gas in the gas cylinder Change it
Gas pipe 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 board
4
Wire-
feeder
doesn’t
work
Wire reel
doesn’t
work
Motor damaged Check and change it
Control circuit damaged Check the board
Wire reel
works
The press wheel is loosen
or weld wire skids
Press it tightly again
The wheel doesn’t fit with
the diameter of weld wire
Change the wheel
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
mistakenly, 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