Lincoln Electric SVM189-B Service Manual page 76

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1. Remove the input power to the machine.
2. Perform the Case Cover Removal Procedure.
3. Locate the fan terminals on the Control board on
terminal strip 1 and terminal strip 2. See Wiring
Diagram. See Figure F.5.
4. Turn machine on to conduct voltage test.
WARNING
ELECTRIC SHOCK can kill.
• Have an electrician install and
service this equipment. Turn the
input power OFF at the fuse box
before working on equipment. Do
not touch electrically hot parts.
Turn the machine OFF between each test.
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5. On 120 Volt Machines, at the FAN terminals on ter-
minal strip 1 and 2, there should be 120 VAC. See
Wiring Diagram.
6. On 230 volt machines, at the FAN terminals on ter-
minal strip 1 and 2, there should be 230 VAC. See
Wiring Diagram.
TROUBLESHOOTING & REPAIR
FAN MOTOR TEST (CONTINUED)
FIGURE F.5. – CONTROL BOARD LEAD LOCATION(S)
Terminal Strip 2
Terminal Strip 1
COMPACT WIRE WELDERS
7. If the correct voltages are not there, check for cor-
rect input voltages at terminal strip 1 and 2 on ter-
minals 1 and 6. See Wiring Diagram. See Figure
F.5.
8. If correct voltages are at terminals 1 and 6 and not
at FAN terminals, possible faulty Control Board.
9. If the correct voltages are at the FAN terminals, then
check for correct voltages at the fan motor. See
Wiring Diagram.
10. If the correct voltages are at the fan motor, possi-
ble bad motor.
11. the correct voltages are at the fan motor, check for
bad or broken leads or terminals.
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