> For the complete documentation index, see [llms.txt](https://docs.kupastation.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kupastation.com/en/station/troubleshooting/sparkling-flat.md).
# The water is not sparkling.
## **Troubleshooting Steps**
{% stepper %}
{% step %}
**CO₂ level**
Verify that the CO₂ cylinder is not empty by checking the left-hand pressure gauge.
{% endstep %}
{% step %}
**Pressure**
Ensure the pressure is set to 4 bar *(60 psi)* using the upper pressure gauge.
{% endstep %}
{% step %}
**Temperature**
Check the temperature using the [Sensors](/en/station/manager/sensors.md) section.
**-> If the temperature is above 50°F / 10°C, refer to** [Error 40-2](/en/station/troubleshooting/unavailable/40-2.md)**.**
{% hint style="warning" %}
If the situation is still unresolved at this stage, the following steps explain how to empty the carbonator to start again from the initial state, as if there had never been any water in the station.
{% endhint %}
{% endstep %}
{% step %}
**Maintenance Menu**
Open the [Maintenance Menu](/en/station/manager.md) on the station's touchscreen.
{% endstep %}
{% step %}
**Cooling Unit**
Disconnect the cooling unit cable from the internal socket.
{% endstep %}
{% step %}
**Filter Position**
Set the filter to the "closed" position.
{% endstep %}
{% step %}
**Pressure**
Complete a full rotation counterclockwise.
{% endstep %}
{% step %}
**Valves Test**
Use the “Valve Test” function to dispense sparkling water until only CO₂ comes out.
{% endstep %}
{% step %}
**Filter Position**
Set the filter to the "open" position.
{% endstep %}
{% step %}
**Cooling Unit**
Reconnect the cooling unit cable to the internal socket.
{% endstep %}
{% step %}
**Cycle**
Wait for the pump to complete its cycle (approx. 30-60 seconds).
{% endstep %}
{% step %}
**Valves Test**
Use the “Valve test” function to dispense a 500 ml beverage of sparkling water.
{% endstep %}
{% step %}
**Pressure**
Adjust pressure gauge to 4 bar (60 psi) while beverage is being dispensed.
{% endstep %}
{% endstepper %}
{% hint style="warning" %}
If the issue persists, contact .
{% endhint %}
---
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