Lincoln Electric INVERTEC SVM158-A Service Manual page 57

F-7
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The machine's welding output is
very high and uncontrollable.
The Weld Mode Select does not
function properly.
The output control and/or Weld
Terminals Select functions do not
operate properly.
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 1-800-833-9353(WELD).
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Put the Control Select in the
Local position. If the problem is
solved the
device or associated circuitry
may be faulty.
2. Check for proper current and
voltage calibration.
1. Refer to Operation Section of
this manual for normal operation
characteristics.
NOTE: The mode panel is not pre-
sent if
process panel is installed.
1. Refer to Operation Section of
this manual for normal operation
characteristics.
2. Check for proper current and
voltage calibration.
CAUTION
V350-PRO
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Perform
Transducer Test.
remote control
2. If the output is normal when
the Control Select is in the Local
position but the output is very
high in the Remote position the
remote board may be faulty.
Perform
Resistance and Voltage Test.
3. The control board may be faulty.
1. Check for loose or faulty plug
connections between the con-
trol board and the mode select
panel. See the wiring diagram.
the advanced 2. Perform
Resistance and Voltage Test.
3. The Mode Select Panel board
may be faulty.
4. The control board may be faulty.
1. Check for loose or faulty plug
connections
remote board and the weld/out-
put controls. See the wiring dia-
gram.
2. The Remote Board may be
faulty.
3. The control board may be faulty.
F-7
the Current
The SPI Cable
the SPI Cable
between the