The NetCol5000-A35kW indoor unit installation needs to be connected to the zero line.

On the NetEco, the door status is always open, we can identify with the faulty by ( ).

The default user name of ECC800 is admin, and admin has permission to operate on the ECC800 WebUI.

NeCol5000-C nitrogen filling pressure value is (); holding time is ().

When the temperature detector or smoke detector in the FusionModule1000 generates an alarm, ( ) emits a continuous beeping sound to remind you to take measures as soon as possible to avoid a major accident. (Multiple choice)