Union Government
(1) When a President is to be impeached for violation of the Constitution, the charge shall be preferred by either House of Parliament. (2) No such charge shall be preferred unless the resolution proposing it has been moved after at least fourteen days' notice signed by not less than one-fourth of that House's total membership, and the resolution is passed by a majority of not less than two-thirds of that House's total membership. (3) The other House shall then investigate the charge, and the President has the right to appear and be represented at that investigation. (4) If, as a result of the investigation, a resolution declaring the charge sustained is passed by a majority of not less than two-thirds of that House's total membership, it removes the President from office from the date the resolution is passed.
Removing a sitting President for violating the Constitution requires a demanding process: one House of Parliament formally charges the President (needing a two-thirds majority to even pass that charge), the other House then investigates (with the President entitled to appear and defend themselves), and only if that House also passes the charge by a two-thirds majority is the President actually removed.
No Indian President has ever actually been impeached - the very high two-thirds-majority-in-both-Houses threshold, combined with the President's right to be heard during the investigation, makes this an intentionally difficult and rare process, used only for genuine constitutional violations.