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LINCOLN ELECTRIC
AIR / GAS SOLENOID 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 procedure will help determine if the Air / Gas Solenoid is receiving the correct input voltage and if the
Solenoid is functioning properly.
MATERIALS NEEDED
Volt/Ohmmeter
Wiring Diagram
TEST PROCEDURE
1. Remove the input power from the Tomahawk 1500 machine.
2. Perform the Case Cover Removal And Capacitor Discharge Procedure.
3.
Locate the air / gas solenoid. See
4.
Apply the correct input power and air pressure to the machine.
5.
At the input board carefully check for 12 VDC at plug J8 Pin 1 (red lead +) to plug J8 Pin 2 (black lead
-). These are the solenoid leads. See
and the correct air pressure applied. If the 12 VDC is not present, the input board is not sending the
activation voltage to the air / gas solenoid. There may be a problem with the air regulator, the air
pressure switch or the input board. See the Wiring Diagram.
6.
If the 12 VDC is present at plug J8 Pin 1 (red lead +) to plug J8 Pin 2 (grey lead -) and the solenoid
does not activate, the solenoid may be faulty.
7.
When testing is complete, replace all leads and plugs that may have been removed. See Wiring
Diagram.
8.
If any of the tests fail, the air / gas solenoid may be faulty.
9.
If faulty, perform the
10. Perform the Case Cover Replacement Procedure.
Figure
F.26.
Figure F.27
Air / Gas Solenoid Removal And Replacement
Tomahawk® 1500 Service Manual
and F.28. Note the torch trigger must be activated
Procedure.
48
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Troubleshooting
