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Weldmatic 350i + Weldmatic 500i
Model No CP139, CP140
19
If the following checks do not identify
the fault condition, the equipment
should be returned to a WIA Service
agent. Phone 1300 300 884 for details
of your nearest service agent.
Power source has no output and no
wirefeed when gun switch is closed :
‘ON’ indicator light is not illuminated
1 Check equipment is connected to a
functional mains power outlet. Test outlet
using a known working appliance.
2 Check fuse on rear panel
‘ON’ indicator light is illuminated
1 The gun switch circuit may be incomplete.
• Check the gun switch for continuity
with an ohm meter when the switch
is pressed. Replace if faulty
• Check the 2 pin receptacles in Euro
adaptor are making contact with the
mating pins from the gun Euro end.
2 Power source may have overheated.
• The Weldmatic welding power
source incorporates an in-built
over-temperature thermostat
which will trip if the welding load
exceeds the operating duty cycle.
The ‘OVERLOAD’ light will be
illuminated. The thermostat will reset
automatically - do not switch the
equipment off as the cooling fan will
assist the resetting of the thermostat
9 External Trouble Shooting
• If problem persists after the cool down
period, call your WIA service agent.
Power source has low weld output
1 Check all electrical connections in the
welding current circuit, including weld
cable, work clamp and gun/cable assembly.
Circuit breaker trips during welding
1 Check the rating of the mains supply
circuit breaker. The Weldmatic should be
supplied from a suitable circuit breaker
(refer to section 5).
Unsatisfactory Welding Performance
and Results
Erratic arc characteristics caused by poor
wirefeed
Erratic wirefeed is the MOST LIKELY cause of
failure in all Gas Metal Arc Welding. It should
therefore be the first point checked when
problems occur.
1 Check the torch contact tip is not worn. A
worn tip can cause arcing to the wire inside
the tip and cause the wire to stick and
hesitate
2 Check if the consumable wire is slipping
in the drive rolls. Replace the feed roll if
it is the incorrect size or is worn