Stealth DIGI-ARC 160PFC MV, Operator'S Manual

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STEALTH DIGI-ARC 160PFC MV
20
MAINTENANCE AND TROUBLESHOOTING
18
If there are some simple troubles of ARC 160/200 PFC MV 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
The arc force adjusted too small Increase the arc force
10 Arc blow
Airflow disturbance Use the shelter from airflow
The electrode eccentricity
Adjust the electrode angle
Change the electrode
Magnetic effect
Incline the electrode to the opposite
way of the magnetic blow
Change the position of earth clamp or
add earth cable in the two side of
workpiece
Use the short arc operation
11 The alarm light is on
Over heat
protection
Over welding current Induce the welding current output
Working time too long Induce the duty cycle (interval work)
Over current
protection
Unusual current in the
main circuit
Test and repair the main circuit and
drive PCB (Pr1)
If there are minor problems with the DIGI-ARC160PFC MV welding machine, consult
the following chart: