Operators Manual
12
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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.
No Welding Current
Check:
1 Check that mains supply is available
at the Weldarc inverter power source.
At least one of the display panel lights
should be on. If not, test outlet using a
known working appliance.
2 Check that the welding and work leads
are connected securely to the output
sockets at the front of the machine.
3 Check for continuity of the work lead,
work clamp and electrode holder. Loose
connections can prevent proper flow of
the welding current.
4 The Weldarc inverter welding power
source incorporates an in built protection
device which will operate if the unit is
overloaded. In this event, the machine
will not deliver welding current, and the
Over Temp light will be on. Leave the
machine energised with the fan running
to achieve the maximum cooling rate.
5 If the supply voltage is too high or too
low then the Over Temp light will be on
and the machine will not deliver welding
current.
Check the mains voltage supply. Long
extension cords can cause low voltage.
A generator can cause high voltage.
9 External Trouble Shooting
The electrical components of the equipment
are shown in the circuit diagram below. The
Weldarc inverter is an inverter type design,
where the mains supply is first rectified,
filtered then chopped to a high frequency
before being applied to the welding
transformer. The output of this transformer
is rectified to form the welding output of the
machine.
10 Service Information
Before removing the equipment
cover, ENSURE that the equipment
is disconnected from the mains
power supply. When the equipment
is energised LETHAL VOLTAGES are
present on the electrical components
enclosed.
CAUTION: The following
information is intended for use
by qualified service personnel.
When the unit is energised
LETHAL VOLTAGES are present
on the electrical and electronic
components. It is not intended that
persons without suitable training
and knowledge attempt to perform
service tasks on the components of
this welder.
