A WILKINSONSTAR PRODUCT 02-18 ISSUE 1
Operation steps in spot welding:
Keep the torch 2-4mm away from the workpiece Press the torch trigger, gas valve opens, and HF starts
and this ignites the arc. When the arc is established the HF stops, and the current goes to the the preset
value. Welding begins, and it ends when the spot welding time is up. There is no current upslope and
downslope in spot welding mode.
TROUBLESHOOTING
The following operations should only be carried out by suitably qualified competent persons. Make
sure the input cable of the machine is disconnected from the electricity supply before removing covers
from the welding machine.
Fault symptom
Causes and Solutions
Turn on the machine, the power indicator
does not illuminate, the fan doesn't work,
and no welding output.
Check if the power switch is closed.
No input power.
Turn on the machine, the fan works, but
the output current is unstable and can't be
controlled by potentiometer when welding.
The current potentiometer fails. Replace it.
Check if any loose contact exists inside the machine. If any, reconnect.
Turn on the machine, the power indicator
illuminates, the fan works, but no welding
output.
Check if any loose contact exists inside the machine.
Open circuit or loose contact occurs at the joint of output terminal.
The overheating LED illuminates.
The machine is under overheating protection status. It can recover
automatically after the welding machine is cooled.
Check if the thermal switch is ok. Replace it if damaged.
Check if the thermal switch is loosely connected, and reconnect it if
The electrode holder becomes very hot.
The rated current of the electrode holder is smaller than its actual working
Excessive spatter in MMA welding.
The output polarity connection is incorrect. Exchange the polarity.