Pressure Sense Board Test Procedure - Lincoln Electric FlexCut 200 Service Manual

LINCOLN ELECTRIC

PRESSURE SENSE BOARD 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 Pressure Sense Board 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 pressure sense board. See Figure F.50. See Wiring Diagram.
5. Carefully apply the correct input power to the machine.
6. Using a volt/ohmmeter, measure the voltage from plug J4 pin 3 (lead 222) to plug J4 pin 1 (lead
227). Voltage should read 5 VDC. See Figures F.51 and F.52. See Wiring Diagram.
7. Using a volt/ohmmeter, measure the voltage from plug J4 pin 2 (lead 226) to plug J4 pin 1 (lead
227). Voltage should read 2 VDC @ 0 p.s.i. plasma gas pressure. PSI=(Vout – 0.2)*153.846. See
Figures F.51 and F.52. See Wiring Diagram.
8. Using a volt/ohmmeter, measure the voltage from plug J4 pin 5 (lead 221) to plug J4 pin 1 (lead
227). Voltage should read 2 VDC @ 0 p.s.i. shielding gas pressure. PSI=(Vout – 0.2)*153.846. See
Figures F.51 and F.52. See Wiring Diagram.
9. If any of the tests fail, the pressure sense board may be faulty.
10. If faulty, perform the Pressure Sense Board Removal And Replacement Procedure.
11. Perform the Case Cover Replacement Procedure.
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