20
Observe that Whether the current output cable is damaged. If it is damaged, it should be
wrapped up, insulated or changed.
Monthly
examination
Using the dry compressed air to clear the inside of arc welding machine. Especially for
clearing up the dusts on radiator, main voltage transformer, inductance, IGBT module, the
fast recover diode and PCB, etc.
Check up the bolt in arc welding machine, if it is loose, please screw down it. If it is skid,
please replace. If it is rusty, please erase rust on bolt to ensure it works well.
Quarter-
yearly
examination
Whether the actual current accords with the displaying value. If they does not accord,
they should be regulated. The actual current value can be measured by the adjusted
plier-type ampere meter.
Yearly
examination
Measure the insulating impedance among the main circuit, PCB and case, if it below
1MΩ, insulation is thought to be damaged and need to change, and need to change or
strengthen insulation.
§5.2 Troubleshooting
Before arc welding machines are dispatched from the factory, they have already been
debugged accurately. So forbid 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 personal who is authorized by our company could overhaul
the machine!
Guarantee to shut off the arc welding machine’s power before turn on the outline of the
equipment!
If there is any problem and has no the authorized professional maintenance personal of our
company, please contact local our company agent or the branch company!
If there are some simple troubles of GT-
series
welding machine, you can consult the
following overhauling chart:
S/N
Troubles
Reasons
Solution
1
Turn on the power source, and
fan works, but the power light
is not on.
The power light damaged or connection is
not good
Test and repair the inside circuit of
power light
The transformer of power is broken
Repair or change the transformer
Control PCB failures
Repair or change the control PCB
2
Turn on the power source, and
the power light is on, but fan
doesn’t work.
There is something in the fan
，
Clear out
