5.2
Troublesh-
ooting
- Before the welding machines are dispatched from the factory, they have already been tested and
calibrated accurately. It is forbidden for anyone who is not authorized by our company to do any
change to the equipment!
- Maintenance course must be operated carefully. If any wire becomes flexible or is misplaced, it maybe
potential danger to user!
- Only professional maintenance staff that isauthorized by our company could overhaul the machine!
- Be sure to shut off the Main Input Power before doing any repair work on the welding machine!
- If there is any problem and there is no authorized professional maintenance personal on site, please
contact local agent or the distributor!
If there are some simple troubles with the welding machine, you can consult the following Chart:
NO.
Troubles
Reasons
Solution
1 Close the breaker, but
the power light isn’t on
Breaker damaged
Change it
Fuse damaged
Change it
Input power damaged
Change it
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
Electromagneticvalve
damaged
Change it
Output gas
when test
gas
Control switch damaged
Repair the switch
Control circuit damaged
Check the PCB
4
Wire-
feeder
doesn’t
work
Wire reel
doesn’t
work
Motor damaged
Check and change it
Control circuit damaged
Check the PCB
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
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
Date
Maintenance items
Daily
examinati
on
Observe that the knobs and switches in the front and at the back of arc
welding machine are flexible and put correctly in place. If any knob has not
been put correctly in place, please correct. If you can't correct or fix the knob,
please replace immediately;
If any
switch is not flexible or it can't be put correctly in place, please replace
immediately. Please get in touch with maintenance service department if there
are no accessories.
After turn-on power, watch/listen if the arc-welding machine has shaking,
whistle calling or peculiar smell. If there is one of the above problems, find out
the reason and clear it. If you can't find out the reason, please contact your local
service repair station or distributor/agent .
Observe that the display value of LED is intact. If the display number is
not
intact, please replace the damaged LED. If it still doesn’t work, please maintain
or replace the display PCB.
Observe that the min/max values
on
LED agree with the set value. If there is
any difference and it has affected the normal welding results, please adjust it.
Check whether the fan is damaged and whether it is normal to rotate or
control. If the fan is damaged, please change immediately. If the fan does not
rotate after the machine is overheated, observe if there is something blocking
the blade. If it is blocked, please clear the problem. If the fan does not rotate
after getting rid of the above problems, you can poke the blade by the rotation
direction of fan. If the fan rotates normally, the start capacity should be
replaced. If not, change the fan.
Observe whether the fast connector is loose or overheated. If the arc- welding
machine has the above problems, it should be fastened or changed.
Observe whether the current output cable is damaged. If it is damaged, it
should be insulated or changed.
Monthly
examinati
on
Using the dry compressed air to clear the inside of arc welding machine.
Especially for clearing up the dusts on radiator, main voltage transformer,
inductors, IGBT modules, fast recover diodes, PCB’s, etc.
Check the screws
and bolts
in the machine. If any is loose, please screw it
tight. If it is shaved, please replace. If it is rusty, please erase rust on all bolts to
ensure it works well.
Quarter-
yearly
examinati
on
Check whether the actual current accords with the displaying value. If they did
not accord, they should be regulated. The actual welding current value can be
measured by and adjusted by plier-type ampere meter.
Yearly
examinati
on
Measure the insulating impedance among the main circuit, PCB and case, if it
below 1M
Ω
, insulation is thought to be damaged and need to change, and need
to change or strengthen insulation.
