How to switch the boiler to summer mode (cooling)?

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The summer mode (cooling) of the HSBC 300 L cool is activated via the WPM manager (Heat Pump Manager), which is the main controller of your heat pump. Unlike heating, cooling first requires the installation of an optional temperature probe and a configuration in the WPM.

Essential prerequisites:

You must have an optional surface cooling temperature probe (accessory to be ordered separately). Without this probe, the cooling mode cannot function.
The probe must already be installed on your system and connected to the T(KUE) terminal of the XD04 terminal of the device.
The system cools the rooms to a regulated temperature between 7 °C and 12 °C, according to your settings.

Activating the cooling mode:

Access the WPM manager (touch interface, control screen, or dedicated app depending on your installation).
Look for the “Cooling mode,” “Summer mode,” or “Cooling mode” function in the settings.
Toggle this mode to the active state (usually a switch or an “ON” option).
Check that the WPM correctly detects the T(KUE) probe; it should appear as “connected” or “active.”

If the cooling mode does not appear or is not available: Refer to the installation and usage manual of the WPM manager (provided separately with your controller). It contains the detailed settings specific to your WPM model. If the optional probe is not yet installed, contact your STIEBEL ELTRON installer to have it added and configured.

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