Troubleshooting Guide - Everlast PowerMTS 251Si Operator's Manual

Section 4
NO. Trouble
18 Arc will not start unless lift started.
19 Tungsten is rapidly consumed.
Tungsten is contaminated, arc changes to
a green color.
Porosity of the Weld. Discolored weld
color. Tungsten is discolored.
Weld quality is poor. Weld is dirty/
oxidized, or porous.
Unstable Arc.
Other issues.
Possible Cause
Points misadjusted, worn or dirty.
HF not selected
Inadequate gas flow. Too small of
tungsten. Wrong shielding gas. Use
only Ar. Using green tungsten.
Wrong polarity. Possible contami-
nation of shielding gas from gas
supplier
Tungsten is dipping into weld. Too
long of stick-out.
Low flow rate of shielding gas. High
flow rate of shielding gas. Tungsten
stick-out is too far. Too short of
post flow period. Wrong TIG cup
size. Possible gas leaks internally or
externally due to loose fittings.
Base metal is contaminated with
dirt or grease.
Drafty conditions. Unit is located
on the workpiece and is blowing gas
off due to fan activity. Solenoid is
sticking. Too short of pre-flow or
post-flow
Poorly ground or shaped tungsten.
Bad work clamp connection. Metal
is indirectly connected through
table or other item.
70

Troubleshooting Guide

Solution
Check HF point gap. Clean and set to .035" Contact
Technical Support for details. Make sure unit is set to
HF
Check gas flow. Check for Leaks thoughout system/
regulator/tank. Check for 100% Argon. Use red thori-
ated or any other type besides Green (Pure) or Zirconi-
ated. Put torch in Negative.
Check and adjust stick out to minimum 1/8 inch. Tung-
sten is melting. Reduce amperage or increase tungsten
size. Reduce stick-out to less than 1/4".
Increase flow rate on regulator. Check for kinks in tub-
ing. Increase post-flow time. Reduce stick-out to less
than 1/4". Increase cup size, or use gas lens. Clean
metal thoroughly with approved metal cleaner, or use
acetone and a rag to clean metal
Eliminate drafts. Move welder. Check if there is suffi-
cient shielding gas left in tank. Check gas flow. Adjust
for higher flow of gas. Listen for audible click of gas
solenoid. If no click is heard, then contact Everlast
Support. Clean weld properly. Increase pre flow or post
flow.
Regrind to proper point. Wrong polarity. Place torch in
DC negative (-). Connect work clamp directly to item
being welded.
Contact Everlast support.