Lincoln Electric 11694 Service Manual page 19

®
POWER WAVE S350
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The thermal LED is ON. The machine
regularly overheats. There is no welding
output.
The "Real Time Clock" no longer functions.
The Power Wave S350 will not produce full
output.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. The welding application may be
exceeding the recommended duty cycle
and/or current limits of the machine.
2. Dirt and dust may have clogged the
cooling channels inside the machine.
See the Maintenance section of the
Operators Manual.
3. The air intake and exhaust louvers may
be blocked due to inadequate clearance
around the machine.
4. Make sure the fans are functioning
correctly. The fans should run in a low
speed setting when the machine is at
idle and a high speed when welding
output is activated. The fans should also
run if a thermostat has tripped.
1. The control board battery may be faulty.
Replace if necessary (type BS2032).
1. The input voltage may be too low. See
the Check for error codes. See Status
LED Troubleshooting in this section.
2. Make certain the input voltage is correct
for the machine.
CAUTION
TROUBLESHOOTING AND REPAIR
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check the thermostats and associated
wiring for loose or faulty connections.
See the Wiring Diagram.
2. Check the DC voltages being applied to
the fans at lead 351(-) to lead 353(+).
At the low speed setting the voltage
should be 24VDC. At the high speed
setting the voltage should be 48VDC.
See the Wiring Diagram.
2. The control board may be faulty.
1. Perform the Current Transducer Test.
2. Perform the Power Wave Verification And
Calibration Procedures, see SVM251.
3. The control board may be faulty.
Perform the Control Board Test.
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