LORCH M-Pro BasicPlus, Operation Manual

Page: 53 / 328

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