HK landlord often suck and renting flats in here is in my opinion the worst thing about this city. Knowing that, it's unrealistic to have the expectation that they will maintain appliances or do anything nice for you. Your biggest problem seems to be that you think that other countries rules and regulations apply here. Sorry to disappoint but that's what happens when you live in a foreign country, you either adjust your expectations or you're miserable and/or you leave. You can always ask but in most cases, you are out of luck unless it's clearly indicated in the contract and I fully expect the landlord to take the repair out of your deposit.