I do not agree with shri karandikar CC account if not a clean advance, then necessariliy secured by Hypothecation of stock and book debts. In short, it is a working capital finance. And as per bank's norms and as a pruidency requirement has to be necessarily used for working capital related payments such as payment to creditors for goods, salary, electricity payments etc.
In the present situation, a payment of plant and machinery has been made through cash credit account, which means that capital asset payment has been made from working capital finance. Ideally, you should have availed term loan finance for the machinery instead utilising working capital facility.
In long run it could have a strain on your working capital financing and it may also be objected by your bankers.
These are my views
regards
.