**Title: Repair Case Summary for Zhigao Air Conditioner; Built-in Air Conditioner Leaking**
**Fault Phenomenon:** Indoor unit leaking, operation light flashing.
**Cause Analysis:** After inspection, it was found that water was overflowing directly from the condensate tray. Checking the drainage of the drain pipe revealed very little water flow, leading to an initial judgment that the drain pump was not providing sufficient drainage. After replacing the drain pump and testing the unit, it operated normally.
**Repair Measures:** Replace the drain pump.
**Experience Summary:** The drainage method for built-in air conditioners differs from split-type units. Split-type units use natural drainage, whereas built-in units rely on a drain pump to expel water outside. If there is a leak, it is important to focus on checking whether the drain pump is functioning properly. From the fault phenomenon (operation light flashing), we can also determine that this is a drainage protection issue. Of course, a significant portion of leaks in built-in units are caused by improper installation, specifically uneven drain pipes. This requires us to carefully analyze the cause during repairs.
**Source of Article:** [http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3482552](http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3482552)