Lincoln Electric POWER WAVE STT Operator's Manual page 20

POWER WAVE ® STT ® MODULE
PREPARATION
• Connect the STT
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(This test assumes the host power source has been calibrated.)
• Verify the latest software is loaded in the Power Wave.
• Short the Work (-) to the Electrode (STT
(Total Cable Length ≤ 10ft.)
TEST PROCEDURE
• Enable test modes on the UI of the Wire Feeder.
See Wire Feeder instruction manual (set-up menu selection P.99).
• Select test mode 208 (STT
If mode 208 is not available with the test modes enabled, the Power Source software must be updated.
• Enable the output.
Pulling the trigger, or turn the trim knob clockwise.
• Read Voltage feedback displayed on the Wire Feeder Display.
Voltage
STT Switch Shorted:
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• Faulty or disconnected Differential I/O control signal (grey cable located at rear of module).
Verify cable connections (including those internal to the STT
< 2V • STT Input tied to negative weld output (Reverse Polarity, typically accompanied by Error 99).
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Verify STT
• STT Switch Shorted (typically accompanied by Error 99).
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Disconnect and perform STT
5 - 10V
Normal Operation
STT Switch Open:
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• Loose or open connection.
Verify weld cable connections (both internal and external to the module – including quick connections).
> 40V
• STT Switch not closing (may be accompanied by Error 99).
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Verify status of the STT
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized
Field Service Facility for technical troubleshooting assistance before you proceed.
Observe all Safety Guidelines detailed throughout this manual
STT MODULE FUNCTIONAL TEST
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module to a Power Wave S350 or other compatible machine.
Output).
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Test Mode).
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Switch is properly connected.
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Switch PCB Test.
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Switch board via the "on board" diagnostic LED's.
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Indication / Possible Cause
Switch and host power source).
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CAUTION
E-2
TROUBLESHOOTING