SMART PRO 5.0 Pág. 36
5.2 Troubleshooting
5.2 Troubleshooting
5.2 Troubleshooting
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 companyIf there are some simple troubles of GM-
3150(PFC) welding machines, you can consult the following overhauling chart:
S/N
Troubles
Reasons
Solutions
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 Pr3
Power PCB failures
Repair or change power
PCB Pr2
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 fan motor damaged
Change fan motor
3
Turn on the power source,
and the power light is not on,
and fan doesn’t work
No input voltage
Check whether there is
input voltage
Overvoltage (Input voltage is too
much or not)
Check input voltage
4
No no-load voltage output
There is trouble inside the
machine
Check the main circuit, Pr1
and Pr2
5
No current output in the
welding
Welding cable is not connected
with the two output of the welder.
Connect the welding cable
to the welder’s output
Welding cable is broken
Wrap, repair or change the
welding cable
Earth cable is not connected or
loosen
Check the earth clamp
6
Not easy to start arc in the
welding, or easy to cause
sticking
The plug loosen or connect not
well
Check and tighten the plug
Oil or dust covered the workpiece
Check and clear out
MMA/TIG welding selection is
wrong
Selecting the MMA welding
7
The arc is not stable in the
welding process
The arc force is too small
Increase the arc force
8
The welding current can
not be
adjusted
The welding current potentiometer
in the front panel connection not so
good or damaged
Repair
or
change
the
potentiometer
9
The penetration of molten
pool is not enough(MMA)
The welding current adjusted too
low
Increase
the
welding
current
