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LORCH M-Pro BasicPlus Bedienungshandbuch Seite 53

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Troubleshooting
Fault
Control panel is com-
pletely dark
Inert gas missing
Inert gas does not
switch off
Inert gas feed insuf-
ficient
Welding power is
reduced
Ground cable connec-
tor becomes hot
Wire feed unit has
increased wire abra-
sion
Tab. 9:
Troubleshooting
10.13
Possible cause
Phase missing
Gas cylinder empty
Torch faulty
Pressure reducer dirty or faulty
Gas cylinder valve faulty
Gas valve dirty or sticking
Inert gas quantity set incorrectly at
the pressure reducer
Pressure reducer dirty
Torch or gas hose blocked or
leaking
Inert gas blown away by draughts Eliminate the draughts
Phase missing
Insufficient ground contact at
workpiece
Ground cable not correctly insert-
ed at the equipment
Torch faulty
The connector was not locked by
turning clockwise
The wire feed rollers do not match
the wire diameter
Incorrect contact pressure on wire
feed unit
Rectification
Check the equipment at a dif-
ferent power socket. Check the
supply cable and mains fuse
Replace
Check and replace if necessary
Check and replace if necessary
Replace gas cylinder
Remove torch and pressure
reducer, blow out the gas valve
in the opposite flow direction
with compressed air
Set the inert gas quantity as
described in the operating
instructions
Check the pressure reducing
nozzle
Check and replace if necessary
Check the equipment using a
different power socket; check
the supply cable and the mains
fuses
Create a good clear ground
connection
Lock the ground connector at
the equipment by turning clock-
wise
Repair or replacement
check
Fit the correct feed rollers
Set as described in the operat-
ing instructions
- 53 -

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