You can do that if you have a Theme that successfully integrates / enqueues Font Awesome.
Then in your CRED Delete Post Link Short Code you can use the FontAwesome HTML.
Example:
[cred_delete_post_link class="cred-refresh-after-delete" text="<i class='fa fa-trash'></i>
" action="trash" message="Are you sure you want to delete this post?" message_show="1"]
Please do not hesitate to open a new thread if other issues or problems arise
Beda on his national holiday. This is Minesh here and I'll take care of this ticket. Hope this is OK.
Could you please try to use following code:
[cred_delete_post_link class="cred-refresh-after-delete" text="<i class='fa fa-trash-o'></i>" message="Are you sure you want to delete this post?" message_after="Post deleted" message_show="1" action="trash"]