TPA3251: Sound is interrupted

Part Number: TPA3251

A single-ended audio signal is made up of a reverse phase signal by a differential amplifier and input to input A and input B, respectively, to output audio signals.
The output signal is connected through the transformer through the decoupling capacitor to the speaker.

PVDD is supplying 24V.
If the capacity of the coupling capacitor is increased, the sound from the speaker is interrupted.
The moment the sound was interrupted, the FAULT signal fell to Low.
Does this mean that it is overcurrent?

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