– Lock (also called: prohibition)
Locks the controls to prevent unwanted modification of the settings by another user.
When locked, pressing buttons on the remote controller will not change the settings.
- Complete lock (or ‘child lock’): all the buttons and controls are frozen and cannot be modified
- Partial lock: only selected controls are locked - (for example: operation mode lock means it won't be possible to change the operation mode, but any users can keep modifying the temperature, fan speed… etc)
Locking/unlocking the controls usually requires pressing 2 specific buttons on the remote controller at the same time*. In cases where a central controller is connected to the air conditioning system, some central controllers offer the option to set the locks on the individual zone controllers.
* The majority of Hitachi controllers (hand-held, wired and apps) offer locking feature. Locking method (complete or partial) varies per controller model. It is recommended to read the controller operation manual.