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F-40F-40

TROUBLESHOOTING & REPAIR

STT CURRENT TRANSDUCER TEST (CONTINUED)

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8.If for any reason the machine cannot be loaded to 50 amps, Table F.6 shows what feedback voltage is produced at various cur- rent loads.

9.If the correct supply voltages are applied to the current transducer, and with the machine loaded, the feedback voltage is missing or not correct, the current transducer may be

faulty. Also make certain that lead 811 (plug J8 pin 5) has continuity (zero ohms) between the current transducer and the control board. See the Wiring Diagram.

10.Install the right side case cover using the 3/8” nut driver.

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POWER WAVE 455/R

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Lincoln Electric SVM156-A service manual 40F-40