20
MAINTENANCE AND TROUBLESHOOTING
The following operation requires sufficient professional knowledge on electric aspects and
comprehensive safety knowledge. Make sure the input cable of the machine is disconnected
from the electricity supply and wait for 5 minutes before removing the machine covers.
Maintenance
In order to guarantee that the arc welding machine works efficiently and in safety, it must be maintained
regularly. Operators should understand the maintenance methods and means of arc welding machine
operation. This guide should enable customers to carry out simple examination and safeguarding by
oneself, try to reduce the fault rate and repair times of the arc welding machine, so as to lengthen service
life of arc welding machines.
Troubleshooting
Before arc welding machines are dispatched from the factory, they have already been checked
thoroughly. The machine should not be tampered with or altered. Maintenance must be carried out
carefully. If any wire becomes loose or is misplaced, it maybe potentially dangerous to user!
Only professional maintenance personnel should repair the machine!
Ensure the power is disconnected before working on the machine. Always wait 5 minutes after power
switch off before removing the panels.
Period
Maintenance item
Daily examination
Check the condition of the machine, mains cables, welding cables and
connections.
Check for any warnings LEDs and machine operation.
Monthly examination
Disconnect from the mains supply and wait for at least 5 minutes before
removing the cover. Check internal connections and tighten if required.
Clean the inside of the machine with a soft brush and vacuum cleaner. Take
care not to remove any cables or cause damage to components. Ensure that
ventilation grills are clear. Carefully replace the covers and test the unit.
This work should be carried out by a suitably qualified competent person.
Yearly examination
Carry out an annual service to include a safety check in accordance with the
manufacturers standard (EN 60974-1).
This work should be carried out by a suitably qualified competent person.
Description of fault
Possible cause
Action
The welding arc cannot be
established
Power switch has not been switched ON
Incoming mains power supply is not ON
Possible internal power failure
- Switch ON power switch
- Check incoming power switch for correct supply
- Have a technician check the machine and supply
Difficult arc ignition
Low arc current
- Increase the arc current setting
- Check condition of the MMA welding leads
Overheat LED lit
Machine operated outside duty cycle
Fan not working
- Allow the machine to cool and the unit will reset
automatically
- Have a technician check for obstructions
blocking the fan
Over current LED lit
Mains supply problem
- Have a technician check the mains supply
