Does the property have the obligation to help the owner contact the developer for maintenance because the house leaks rain?

During the warranty period, the property has this obligation.

If the developer fails to perform the warranty, the property shall bear the warranty responsibility, and the owner may request the property maintenance.

Outside the warranty period, neither the property nor the developer assumes the warranty responsibility. The water leakage of the house is a medium repair, not a daily minor repair. You can ask the property to use special maintenance funds for maintenance, but you need the authorization of the industry Committee.