Lincoln Electric PRECISION TIG 375 Service Manual page 63

F-17
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The AC wave balance control does
not function properly.
Gas pre-flow and post-flow time is
too long.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. The AC wave balance control is
operational only in the TIG mode.
1. Check the AC balance control
1. If an advanced control board is
installed, check dip switch set-
ting on the
Installation Manual.
CAUTION
PRECISION TIG 375
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
(R2) and associated leads for
loose or faulty connections. See
the Wiring Diagram.
2. The control board may be faulty.
1. Check plug J3 on the control
board. Either the jumper plug or
board. See the advanced control board must
be plugged into J3.
F-17
Observe Safety Guidelines