Why is my Komatsu PC360-11 showing pump relief codes after setting it up for a hammer and connecting a grapple bucket?

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I recently set up my Komatsu PC360-11 for a hydraulic hammer by switching the return line to the auxiliary valve. After connecting a grapple bucket, the attachment works as expected, but the machine is now showing pump relief codes.

I'm wondering if the issue is related to hydraulic settings, attachment configuration, relief valve adjustments, or incorrect flow settings. Has anyone experienced this after switching from a hammer setup to a grapple? Any advice on what to check next would be appreciated.
 
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