PFI (ABAP) - ABAP Instance not available (PFI aspfi03_PFI_00 (ABAP_SRV))
aspfi03 was down due to SARFC issue. 
To resolve this issue SAP has confirmed that restarting the application server aspfi03 should resolve the SARFC issue. 
Today soft shutdown and start of aspfi03 server happened. 
Now the application server is currently up and is running fine 
No issues has been reported further on this 
Attached the mail chain below as reference. 
Attached the screenshot below as evidence. 
Hence closing this incident