Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 75

F-15
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The Beeper (Piezoelectric Buzzer)
cannot be heard – machine oper-
ating normally.
The welding parameters that were
saved in memory are different
when recalled.
The water cooler does not turn
on.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Background noise may be too
loud for user to hear beeper.
1. Make certain that a remote
control unit is NOT connected.
When a remote control unit is
used, the weld parameters are
set by the remote control
potentiometers.
1. Make sure that the water cool-
er has been installed and also
enabled. Refer to the Setup
Overlay description in the
Operation Section of the
manual.
2. If the water cooler is enabled
but there is insufficient flow
rate in the water cooler hose,
the Power Wave will beep
loudly, and the water cooler
will shut down. Prime the
water cooler. Refer to the
Setup Overlay description in
the Operation Section of this
manual.
3. The coolers circuit breaker
may have tripped. Reset if
necessary
CAUTION
POWER WAVE 450
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Perform the Piezoelectric
Buzzer Test.
2. The display board may be
faulty. Replace and perform
voltage calibration.
1. Check the continuity of wire
#445 (8J44 to 8J16).
2. The power board may be
faulty. Replace.
3. The display board may be
faulty. Replace.
1. Perform the Auxiliary
Transformer #2 Test.
2. Check the continuity of leads
#453, 454, 455 & 456. From
plug J3 to J11. See wiring dia-
gram.
3. The display board may be
faulty. Replace.
4. The water cooler may be faulty.
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