Troubleshooting
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909.2049.9-00
17 Troubleshooting
Fault
Possible cause
Rectification
Displays remain
dark
Defective mains fuse
Replace the fuse
Neutral conductor, mains phase
missing
Check mains cable / mains extension
cable
Battery discharged
Check and charge/replace battery
No welding cur-
rent
Ground line not connected or defec-
tive
Check ground line and replace if neces-
sary
Electrode holder or torch not con-
nected or defective
Check electrode holder or torch and
replace if necessary
Arc does not
ignite
No or poor ground contact
Ensure ground contact
Incorrect electrode diameter
Select correct electrode diameter
Welding current set too low
Set welding current higher
Tungsten electrode soiled or incor-
rectly ground
Grind correctly or replace the electrode
if necessary
Gas volume set incorrectly
Set gas volume correctly
No inert gas
Gas cylinder empty
Replace gas cylinder
Pressure reducer defective
Check and replace if necessary
Gas valve on torch not opened or
defective
Check and replace if necessary
Too little inert gas Torch not tight
Check and replace if necessary
Gas hose not tight
Tighten gas hose
Pressure reducer set incorrectly or
defective
Check and replace if necessary
Pores in weld
metal
Torch not tight
Check and replace if necessary
Gas nozzle not tight
Tighten gas nozzle
Torch head faulty
Check and replace if necessary
Workpiece soiled with grease, rust,
oil, etc.
Clean it
Draught
Shield workplace
Seam "cooking"
(unsteady arc)
Gas supply missing
Check
Incorrect gas
Use correct gas
TIG electrode
melting
Welding current set too high for
electrode diameter
Set the correct welding current
Polarity reversed and TIG torch con-
nected to positive terminal 4
Connect the TIG torch to the negative
terminal 3
