s
DANGER!
Ensure inverter is disconnected from power supply before performing service or maintenance on any part of the unit, cables or clamps.
5.1.
Power unit
Service and maintenance of the inverter must only be undertaken by an authorised service agent.
5.1.1. Keep the inverter clean by wiping with a soft cloth. Do not use abrasives.
5.1.2. Periodically check to ensure the carrying strap is in good order and condition. If not replace it immediately.
5.1.3. Ensure that the front and rear air vents are not blocked.
5.2.
Cables
5.2.1. Check to ensure cables are in good order and condition. If damaged contact your authorised service agent.
5.2.2. Keep cables clean. Do not use solvents.
5. MAINTENANCE
p
WARNING!
Before welding ensure that you read, understand and apply Section 1 safety instructions and that you have familiarised yourself
with the controls. Ensure that the inverter is disconnected from the power supply before moving or before changing accessories.
IMPORTANT! You must be familiar with the application, limitations and hazards of arc welding and if you have no welding experience
you should seek expert training to ensure your safety and the quality of your welds.
4.1.
Work Area
Ensure that the work area has a good airflow and that there is no dust, smoke or
gas present.
4.1.1. Ensure that there is a minimum clearance of 500mm around the inverter and that there
are no obstacles to prevent a cool air flow. Also check to ensure the front and rear
louvres are not blocked.
4.1.2. When moving the inverter disconnect the unit from the mains power supply and gather all
cables safely.
4.2.
Connecting the electrode holder
Connect the holder cable plug to either the positive (+) or
negative (-) dinse socket (fig. 1) as recommended on the electrode packaging. Note that
most electrodes require to be connected to the positive (+) socket.
4.3.
Connecting the work clamp
Connect the work clamp cable plug to the dinse socket not
used for the electrode.
4.3.1. Connect the work clamp to the workpiece or to the supporting metal workbench, checking that there is good electrical contact.
Caution: Ensure that there is good contact on oxidised or coated sheets.
4.3.2. Make the connection as close to the welding area as possible.
4.3.3. DO NOT use metal structures or objects to make the return contact, other than the workbench which is holding the workpiece. To do so
may damage the inverter and will give a poor weld.
Note: To ensure good contact between dinse plugs and sockets always firmly twist plug clockwise.
4.4.
Set-up
Check that the work clamp is correctly clamped to the workpiece.
4.4.1. Switch on the mains power supply and the inverter On/Off switch (switch to the I position).
4.4.2. Set the current regulator control to suit the weld.
4.5.
ARC Welding
Ensure that your eyes and face are protected by a welding mask and that all other skin is covered.
4.5.1. Wipe the electrode tip on the workpiece, as if striking a match, to strike-up the arc. DO NOT hit the electrode onto the workpiece - this
will damage the end of the electrode and make strike-up more difficult.
4.5.2. As soon as the arc is struck maintain a distance above the workpiece equal to the diameter of the electrode.
4.5.3. Move the electrode along the weld line keeping it at an angle of 20-30
O
.
4.5.4. At the end of the weld run bring the electrode back to fill the weld crater and then quickly raise the electrode to extinguish the arc.
4.6.
TIG Welding
(Use optional accessory kit model No.INV/TIG. Not supplied with MW145.V2) Ensure that your eyes and face are
protected by a welding mask. Set the required gas flow using the knob on the gas regulator. Set the welding current required. Wipe
the electrode tip on the workpiece, as if striking a match, to strike-up the arc. DO NOT hit the electrode onto the workpiece - this
will damage the end of the electrode and make strike-up more difficult. When the arc is established, form a molten pool on the
workpiece, introduce the filler rod and proceed along the joint.
4. OPERATING INSTRUCTIONS
fig. 4
3.4. Ratings Plate
On the rear of the inverter is the ratings plate (fig. 1.2), giving the
following data:
1 - The standard relating to the safety and construction of arc welding and associated equipment.
2 - Inverter-transformer-rectifier.
3 - Manual arc welding with covered electrode.
4 - S: Indicates that welding may be carried out in environments with a heightened risk of electric shock e.g. very close to large metallic objects).
5 - Single-phase AC supply.
6 - Rating of internal protection provided by casing.
7 - Output
U
0
: Maximum open-circuit voltage.
I
2
, U
2
: Current and corresponding voltage.
X: Welding ratio based on a 10 minute cycle. 30% indicates
3 minutes welding and 7 minutes rest, 100% indicates continuous
welding. A/V-A/V: Welding current adjustment
range and corresponding voltages.
8 - Mains Supply
U
1
: Rated supply voltage and frequency.
I
max
: Maximum current.
I
1eff
: Maximum effective current.
9 - Serial Number. Specifically identifies each inverter.
10 -
: Delayed fuse for supply protection.
MW145.V2 - 1 - 120505
