16
Operators Manual
Quality
•
Reliability
•
Performance
Quality
•
Reliability
•
Performance
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.
9 External Trouble Shooting
Power source has no output and no
wirefeed when gun switch is closed :
‘OPERATE’ switch is not illuminated
1 Check equipment is connected to a
functional mains power outlet. Test outlet
using a known working appliance.
‘OPERATE’ switch 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 150 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
when the gun switch is on. The
thermostat will reset automatically
- do not switch the equipment off
as the cooling fan will assist the
resetting of the thermostat
• If problem persists after the cool down
period, call your WIA service agent.
9 External Trouble Shooting
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 150
should be supplied from a 16 Amp or
larger circuit breaker.
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 Refer to the points in ‘Wirefeed’ in
Section 8
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
3 Check that gun cable liner is not too
short and is fitted correctly. Refer to
page 24 for fitting instructions.
Constant poor arc characteristics
Check that the:
1 Correct polarity has been selected for
work and weld cables (refer page 8)
2 Shielding gas is correct for the
consumable wire in use (refer page 10)
3 Welding circuit is making good electrical
connection. Ensure that the work clamp
is securely tightened onto the work piece
so that good electrical contact is achieved
