> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/systems-guide/overhead-panel/pressurization.md).

# PRESSURIZATION

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/pressurization-panel-image-6jvxlgka.png)

### CABIN ALT SELECTOR KNOB

**DOWN (Momentary action):** Closes the outflow valve manually.

**STOP:** Normal position.

**UP (Momentary action):** Opens the outflow valve manually.

### MODE SELECTOR KNOB

**MAN:** Manual control of the outflow valve. No automatic cabin depressurization on the ground after landing.

**AUTO:** Automatic operation, changes between the different pressurization modes.

**LFE CTRL:** Allows manual input of the landing field elevation. Pressurization remains in automatic CPCS control. FMS-derived LFE is shown in green. Manually selected LFE is shown with a cyan **M** in front of the altitude readout.

{% hint style="info" %}
If no destination airport is in the FMS, LFE defaults to 0 ft until you set it manually in LFE CTRL.
{% endhint %}

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/pressurization-panel-image-fl6qj9dc.png)

### DUMP BUTTON

**PUSH IN:** CPCS system operates automatically

**PUSH OUT:** Returns the system to normal operation.

Note: Not available in manual mode. If pushed in while in manual mode both recirculation fans and packs are turned off.

### LFE SELECTOR KNOB

**DOWN (Momentary action):** Decreases LFE in 100 ft increments.

**STOP:** Normal position.

**UP (Momentary position):** Increases the LFE in 100 ft increments.

Note: Only works when the MODE selector knob is in LFE CTRL.

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/pressurization-panel-image-dj6ji9z2.png)