Rectifying faults
Vent coolant circuit
34
099-000235-EW501
17.12.2020
Unstable arc
Material inclusions in the tungsten electrode due to contact with filler material or workpiece
Regrind or replace the tungsten electrode
Incompatible parameter settings
Check settings and correct if necessary
Pore formation
Inadequate or missing gas shielding
Check shielding gas setting and replace shielding gas cylinder if necessary
Shield welding site with protective screens (draughts affect the welding result)
Use gas lens for aluminium applications and high-alloy steels
Unsuitable or worn welding torch equipment
Check size of gas nozzle and replace if necessary
Condensation (hydrogen) in the gas tube
Purge hose package with gas or replace
7.2 Vent coolant circuit
Figure 7-1
• Switch off the machine and fill the coolant tank to the maximum level.
• Unlock the quick-connect coupling with a suitable tool (connection open).
To vent the cooling system always use the blue coolant connection, which is located as deep as
possible inside the system (close to the coolant tank)!
Figure 7-2
• Position a suitable collection container for collecting the escaping coolant at the quick-connect coup-
ling and switch on the machine for approx. 5s.
• Lock the quick-connect coupling by pushing back the locking ring.
