Tweco 300 TS Arcmaster(Feb2006) User Manual
Page 50
44
Description
Possible
Cause
Remedy
5 Gas flow won’t
shut OFF.
A Weld Mode (
STD
,
SLOPE
,
REPEAT
or
SPOT
) was changed
before
POST-FLOW
gas time
had finished.
A Strike an arc to complete
the weld cycle.
OR
Switch machine OFF then
ON to reset solenoid.
valve sequence.
B Gas valve is faulty.
B Have an accredited Thermal Arc
Service Agent repair or replace
the gas valve.
C Gas valve jammed open.
C Have an accredited Thermal Arc
Service Agent repair or replace
the gas valve.
D
POST-FLOW
control is set
to 60 sec.
D Reduce
POST-FLOW
time.
6 The TIG electrode has
been contaminated
due to the gas flow
shutting OFF before
the programmed
POST-FLOW
time
has elapsed.
The Weld Process Mode
(STICK, HF TIG or LIFT TIG)
was changed before
POST-FLOW
gas time
had finished.
Do not change Weld Process
Mode before the
POST-FLOW
gas
time had finished.