Welder User Manual

TROUBLESHOOTING & REPAIR
F-40 F-40
POWER WAVE 455/R
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STT CURRENT TRANSDUCER TEST (CONTINUED)
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.