This will ensure that the cheque goes through and does not bounce. 4,000 that your savings account lacks to encash the cheque, will be swept in from the linked FD. The balance in your savings account is Rs.
Your savings account is linked to an FD of Rs. So, you do not have to manually make a transfer every time. If the balance in your current or savings account is low to fulfil the requirement of a debit transaction like EMIs, cheques, minimum balance requirement, etc, then the difference amount is swept out from the FD to the savings /current account.
A sweep-in Fixed Deposit bestows you with the power to transfer funds over a certain limit from savings or current account to FD. HDFC Bank Sweep-in Facility comes with the benefit of current/savings account and fixed deposit (FD).