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TROUBLESHOOTING AND REPAIR |
CONTACTOR TEST (Continued)
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TEST PROCEDURE
1.Remove the input power to the POWER MIG® 215 machine.
2.Using the 5/16” Nutdriver, remove the tool tray.
3.Locate and remove leads 106B, 106C and 107A from the contactor coil terminals. See Figure F.7. See the Wiring Diagram.
4.Using the 7/16” wrench, remove one lead from the contactors large terminals. See Figure F.7. See the Wiring Diagram.
5.Carefully apply 12 VDC to the contactor coil leads. (small terminals)
Do not leave the 12 VDC applied to the contactor coil
for a prolonged period of time (15 seconds maximum). Damage to contactor may result.
6.If the contactor does not activate when the 12VDC is applied, the contactor is faulty. Replace.
7.If the contactor activates when the
12VDC is applied, check the resistance between the two large terminals with the contactor activated. The resistance should be very low (0 to 1 ohm).
8.If the resistance is “high” or “open” between the two large terminals when the contactor is activated, the contactor is faulty. Replace.
9.If the contactor activates and the resistance between the terminals is low when the 12 VDC is applied, the contactor is good
NOTE: When the contactor is not activated, the resistance between the terminals should be very high (infinite). If the resistance is always low, the contacts are “stuck” and the contactor is faulty. Replace.
10.When the test is complete, replace leads 106B, 106C and 107A.
11.Replace the lead previously removed from one of the contactor large terminals.
12.Replace the tool tray.
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Figure F.7. Contactor Terminals and Leads
106B
106C
107A
Output
Contactor