The level sensors prevent functions from being activated when there is no water. This does not affect the functionality of the function 
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Level L1 is considered safe provided that the sensor detects water for at least 3 consecutive seconds. If water is not detected for that length of time, it remains off, thus activating the automatic filling procedure.
If the water level is below the L1 sensor, all the hot tub’s functions are disabled and the message “LL” is displayed on the control panel. When a suitable water level is detected again, the functions are enabled again.
When the water reaches the maximum level sensor (L2) and continues to be detected for 10 consecutive seconds, it disables automatic filling. If the water level is below the L2 sensor, automatic filling is activated.
