During peak current tests, which condition indicates a problem with control circuitry?

• A. The cooling fan is spinning slowly
• B. The readouts are within normal range
• C. The drive belt shows wear
• D. The control circuitry shows abnormal readings

Answer: (C)

Peak current tests rely on the control circuitry to sense the current level and regulate the drive to stay within the desired limits. When everything is working, sensor signals, comparison results, and control outputs align with the expected peak-current profile. If there’s a problem in the control circuitry, you’ll see abnormal readings from the controller or sensors—values that don’t match the expected pattern or timing. That mismatch directly points to an issue in the control path, whether from a faulty sensor, a miscalibrated reference, or a bad output stage. By contrast, a cooling fan spinning slowly suggests overheating or a mechanical issue, normal readouts imply the system is behaving as expected, and a worn drive belt is a mechanical transmission problem, not a fault in the control logic. So, abnormal readings in the control circuitry are the clearest sign of a control-path problem.