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F-14

F-14

TROUBLESHOOTING & REPAIR

INPUT CONTACTOR TEST (continued)

FIGURE F.3 – INPUT CONTACTOR CONNECTIONS

X1, #232

#233

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TEST PROCEDURE

1.Disconnect the main input supply power to the machine.

2.With the 5/16” nut driver, remove the case top and the reconnect panel cover.

3.Locate the two leads connected to the input contactor coil, #233 and X1 #232 (top). See Figure F.3 for location.

4.Connect an AC voltmeter to the leads.

5.Apply the correct voltage to the machine and turn the power switch (S1) ON.

6.Check for 120VAC at the contactor coil leads.

If the 120VAC is NOT present, with the power switch (S1) on, check the power switch (S1) and associated circuitry. See the Wiring

Diagram. Also perform the Control

Transformer (T2) Voltage Test.

If the 120VAC is present and the contactor does NOT activate, then the input contactor is faulty. Replace the input contactor.

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WARNING

Electric Shock can kill.

• With the input power on, there are high voltages inside the machine. Do not reach into the machine or touch any internal part of the machine while the power is on.

IDEALARC CV-400

Page 54
Image 54
Lincoln Electric SVM136-A service manual Input Contactor Test