Debit Balance of P/L ac means a loss to the firm! It is something that the firm is not liable to pay to the members of the firm (owners). Hence -ve balance in Liabilities Side which can be shown on Asset Side. P/l dr balance is a fictatious asset.
Debit balance of p&l account is shown in the asset side of balance sheet because it is a fictitious asset... However it is also said that as credit balance of p&l accout is shown in the liability side debit balance can be shown in the asset side.😐