Gas pre-flow and post-flow time is too long, Troubleshooting & repair, Caution – Lincoln Electric PRECISION TIG 275 SVM162-B User Manual
Page 62
F-16
F-16
PRECISION TIG 275
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.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
The AC wave balance control does
not function properly.
NOTE: BEFORE REPLACING A
CONTROL BOARD
If an Advanced Control Panel is
installed, remove it and replace
the Jumper in connector J-3. If
the machine functions normally,
the Advanced Process panel or
harness is defective.
1. The AC wave balance control is
operational only in the TIG mode.
1. Check the AC balance control
(R2) and associated leads for
loose or faulty connections. See
the Wiring Diagram.
2. The control board may be faulty.
Gas pre-flow and post-flow time is
too long.
1. If an advanced control board is
installed, check dip switch set-
ting on the board. See
1. Check plug J3 on the control
board. Either the jumper plug or
the advanced control board must
be plugged into J3.
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE
Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION