Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 76

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TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The machine beeps without the
keys being pressed.
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
If the water cooler is enabled and
the flow switch inside the water
cooler opens (due to inadequate
coolant flow rate), the machine
indicates this by beeping. This
happens regardless of the overlay
placed on the machine. In this
case, do the following.
1. Turn the machine off and on a
couple of times and see if the
beeping continues. If the flow
rate dropped momentarily, then
turning the machine off and on
eliminates the beeping. A
momentary drop in flow rate
could be due to a temporary
restriction in the water cooler
hose.
2. Check the water cooler and
accessory hoses for kinks,
internal obstructions or block-
age, or ruptures. If such prob-
lems were found then correct
them. Turn the machine Off
and On to check if the beeping
has been eliminated.
3. Check the water cooler fluid
level. Low coolant level could
cause the flow rate to drop.
4. Prime the water cooler. Refer
to the Setup Overlay section
of this manual for instructions.
CAUTION
POWER WAVE 450
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Perform the Auxiliary
Transformer #2 Test.
2. The water cooler may be
defective. Replace.
3. Check the continuity of lead
#453, 454, 455 & 456 from
plug J3 to J11. See wiring dia-
gram.
4. The display board may be
faulty. Replace.
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