Tweco 300 TS Arcmaster(April2006) - Manual (Page 52)

46
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.