MAINTENANCE & TROUBLESHOOTING
20
examination 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 TT-
serires
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
The start capacitor of fan damaged
Change capacitor
The fan motor damaged
Change fan
3
Turn on the power source, and
the power light is not on and fan
doesn’t work.
No power supply input
Test the power supply input
The fuse on the rear panel is broken
Change the fuse (3A)
4
No
no-load
voltage
output
(MMA)
The machine is damaged
Check the main circuit and the PCBs(Pr1
and Pr2)
5
Arc can not be
ignited (TIG)
There is spark
on
the
HF
igniting board.
The welding cable is not connected with the
two output of the welder.
Connect the welding cable to the
welder’s output.
The welding cable damaged.
Repair or change it.
The earth cable connected unstably.
Check the earth cable.
The welding cable is too long.
Use an appropriate welding cable.
