Here is the alternative translation by John D. Ireland complete with notes.
44 The Nibbana-Element
This was said by the Lord, said by the Arahant, so I heard:
"Bhikkhus, there are these two Nibbana-elements. What are the two? The Nibbana-element with residue left and the Nibbana-element with no residue left. What, bhikkhus, is the Nibbana-element with residue left?
Here a bhikkhu is an arahant, one whose taints are destroyed (25), the holy life fulfilled, who has done what had to be done, laid down the burden, attained the goal, destroyed the fetters of being and is completely released through final knowledge. However, his five sense faculties remain unimpaired, by which he still experiences what is agreeable and disagreeable and feels pleasure and pain. It is the extinction of attachment, hate and delusion in him that is called the Nibbana-element with residue left (26).
Now what, bhikkhus, is the Nibbana-element with no residue left?
Here a bhikkhu is an arahant .......completely released by final knowledge. For him, here in this very life, all that is experienced, not being delighted in, will be extinguished. That, bhikkhus, is called the Nibbana-element with no residue left (27). These, bhikkhus, are the two Nibbana-elements.
25. The taints (aasava) are sensual desire, desire for being, and ignorance. See Sutta 56. "one in whom the taints are destroyed" (khinaasava) is another name for an arahant.
26. The attainment of arahantship consists in the extinction of the defilements (kilesa-parinibbaana) - attachment, hate and delusion - and while the arahant continues to live out his life, his freedom from defilements is called " the Nibbana-element with residue left" ( sa-upaadisesa-nibbaanadhaatu). The "residue" is the five aggregates - the mind and body and the senses - that continue to function.
27. As there is no craving and clinging ( "delight" ), at the arahant's death, when the body perishes there is nothing to be projected into a future birth. Thus there takes place the final extinction of the aggregates
( khandha-parinibbaana ), which is "the Nibbana-element with no residue left"
( anupaadisesa-nibbaanadhaatu ).
The Itivuttaka. The Buddha's Sayings. John D. Ireland. 1991 Buddhist Publication Society. Kandy, Sri Lanka.
Best wishes, Vincent.