AB 78 fault code meaning

AB / 78

Series: PowerFlex 700S Phase II

HiHP VoltUnblnce

AC drive

Meaning: (High Horse Power Star-coupler Frame 12 Only) The bus voltage for the left and right side inverter units is unbalanced (6% of normal bus voltage, e.g. 41Vdc = 675Vdc * 0.06).

Possible causes

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