To post a write-down to a depreciation book for which write-down does not have G/L integration, you must use an FA journal.
Open the Fixed Asset Journal window.
Enter information on the journal line. For Help about a specific field, click the field and press F1.
Click Posting, Post to post the journal.
Posting Write-Down Transactions
Posting Write-Down Transactions from FA G/L Journals
Filling In and Posting FA Journals