CPU A/D Converter Fault

What does CPF5 mean?

This fault indicates an internal malfunction within the inverter's CPU, specifically related to its Analog-to-Digital (A/D) converter. It suggests a problem with the inverter's ability to accurately read analog signals, which is critical for its control functions. Input phase loss detection is disabled under this condition.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the fault persists after a power cycle, the A/D converter or the CPU board itself may be damaged.

2. 4

   Contact Yaskawa technical support or a certified service center for further diagnostics or potential control board replacement.