Thermostat Test Procedure - Lincoln Electric FlexCut 200 Service Manual

LINCOLN ELECTRIC

THERMOSTAT TEST PROCEDURE

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized
repairs performed on this equipment may result in danger to the technician or machine operator and will
invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety
notes and precautions detailed throughout this manual. 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.
TEST DESCRIPTION
This test will determine if the Thermostat is functioning properly.
MATERIALS NEEDED
Volt/Ohmmeter
Wiring Diagram
TEST PROCEDURE
1. Carefully remove input power from the FlexCut 200 machine.
2. Perform the Case Cover Removal Procedure.
3. Perform the Capacitor Discharge Procedure.
4. Locate the thermostat, on the switch board heat sink. See Wiring Diagram.
5. Locate plug J25 on the switch board. Label and disconnect plug J25 from the switch board. See
Figure F.16. See Wiring Diagram.
6. Using a digital volt/ohmmeter, check the resistance between plug J25 pin 2 (lead #409) and plug J25
pin 6 (lead #410). See Figure F.17. See Wiring Diagram. The resistance should be very low (less
than one ohm).
7. If the test fails, the thermostat may be faulty.
8. If faulty, perform the Thermostat Removal And Replacement Procedure.
9. Connect plug J20 to the switch board. See Wiring Diagram.
10. Perform the Case Cover Replacement Procedure.
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