User manual is the big source to explore the information of about working, installation and the service of the air conditioner. These manuals also hold the information about the each and every part of the Ac and the warranty implementation scenario. You can freely download Haier air conditioner booklet from my manual collection each link will redirect you to the official site of the brand.
EER Fixed Chassis Air Conditioner
Portable Air Conditioners
Haier HPY12XCN 12,000 BTU
For any other Haier AC you have, find your manual here on official Website