Lincoln Electric SVM179-B service manual Figure F.5 Control BOX Assembly

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F-18 TROUBLESHOOTING & REPAIR F-18

MOTOR OVERLOAD TEST (CONTINUED)

FIGURE F.5 – CONTROL BOX ASSEMBLY

CASE

CONTROL BOX ASSEMBLY

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PROCEDURE

1.Perform the Case Removal Procedure.

2.Remove the 5 #10-24 x .50 screws holding the control box cover to access the contactor leads. See Figure F.2.

3.Remove the five #10-24 screws holding the control box cover, and locate the two motor leads and 3 tach leads. See the Wiring Diagram.

4.Apply the correct input voltage (15-110vdc) to the unit.

5.With the trigger activated and the motor run- ning check the motor armature current. Normal armature current is less then 3 amps.

6.If the amperage exceeds 3.2 amps for more than 8 seconds the motor will be disabled.

7.If the motor armature current is normal and the motor still shuts down the control board may be faulty.

8.If the current is high check for restrictions in the feed system. They can be caused by a clogged liner, spindle tightness, drive rolls to tight, fault drive motor or a faulty gearbox.

9.After testing replace faulty parts and reassem- ble the feeder in reverse order of disassembly.

LN-25™ PRO