Specifications

1.5
MIG/MAG 140/160
Care and Maintenance
The unit is nearly maintenance-free.
B
Danger – Voltage!
Disconnect from power before servicing!
· Check feed roller, pressure roller and wire lead-
in nozzle at regular intervals for dirt build-up,
clean if necessary.
· At appropriate intervals the complete torch
including torch leads should be cleaned, as
rubbed-off parts and dust build-up inside.
· The torch's contact tip is a wearing part. If its ori-
fice has enlarged the contact tip must be
replaced.
· On the inside of the plug-on gas shroud spatters
build up. These have to be removed when nec-
essary. An anti-spatter spray eases this job and
keeps spatters from sticking to the shroud.
· Replace damaged cables without delay.
Trouble Shooting
Mechanical faults are mostly indicated by an irregu-
lar or completely blocked wire feed. Electrical faults
cause a malfunction of the unit, in part or complete.
B
Danger - Voltage!
Electrical fault finding must be left to a quali-
fied electrician.
Further fault finding can proceed according to the
wiring diagram supplied.
Fault find should first start with the unit de-ener-
gized, and in the following order:
1. Check of the power supply cable connection
and all other connections on switches, trans-
former and choke, as well as all plug-and-socket
connections and soldered connections for tight-
ness.
2. Check of fuse for continuity and contact.
3. Visual check for possible shorts or overloads of
windings (discoloring).
Fault, Likely causes Remedy
• Noisy or unstable arc?
Incorrect welding volt-
age
Correct with welding step
switch
Too much/too little wire
feed
Correct with wire feed pot
Earth clamp loose or
high contact resistance
(rust, paint)
Ensure good contact
between earth clamp and
workpiece
Contact tip worn or
incorrect diameter
Replace
Incorrect gas flow rate
setting
Correct
Workpiece not clean in
seam area
Remove paint, rust, grease
etc.
Power unit faulty Have machine checked by
service centre
Spiral liner dirty Clean or replace
Wire feed faulty See below
• Excessive spattering
Wire feed rate too high Correct with wire feed pot
Welding voltage too
high
Correct with welding step
switch
Workpiece not clean Clean
• Wire feed motor does not run
No power Check power supply
Welding step switch in
"0" position
Set to a welding step
Torch trigger switch not
activated
Activate torch trigger switch
Fuse blown Have replaced by a qualified
electrician
Motor faulty Have repaired by service
centre
• No wire feed
Pressure roller loose Increase pressure of leaf
spring with knurled thumb
screw
Wire kinked at wire
feed
Adjust wire lead-in nozzle
Groove in feed roller
worn
Replace
Electrode wire stuck to
contact tip
Replace contact tip, if wire is
deformed, reduce pressure
of pressure roller
• Machine shuts down, overload control light
comes on
Duty cycle exceeded Let machine cool down,
observe duty cycle stated on
nameplate
Power unit faulty Have repaired by service
centre.