---
title: Check cooler diagnostics using Lab app
description: When you connect to an SCS controller installed in a cooler using Lab app, you will be able to see real-time diagnostics data for the cooler.
---
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October 2, 2026
# Check cooler diagnostics using Lab app
## When you connect to an SCS controller installed in a cooler using Lab app, you will be able to see real-time diagnostics data for the cooler.
1. Open Lab app on your desktop, then scan and connect to a nearby cooler.
2. Click **DIAGNOSTICS** menu heading to view real-time data for the device you have connected to as follows:
**Top of page**
- **Name:** Name of cooler
- **Rev**: Firmware revision number
- **OTA**: OTA or bootloader version number for facilitating the application firmware update
- **HS**: firmware version number. This is the second processor on the Mains voltage or 'High side' of the controller.
- **Alarm**: Current alarm status code. 0 = No alarms.
**Center of page**
- **Current state of cooler’ graphic**: Image of the cooler shows current statuses being monitored or controlled by the connected device. You can click on the icons for more detail and to adjust statuses. Depending on the device this may include functions such as:
- Evaporator fan
- Return air temperature
- Light state
- Door state
- Perishable or non-perishable status
- Power Supply
- Compressor state
- ‘**Current state of settings’ graph**: a real-time graph with any changes to selected statuses since you connected i.e., Door switch, return air temperature, input power etc. If you click the + icon you can select or deselect the inputs and outputs to display in the chart. (*See image below*).
**Bottom of page**
- **Activity Log**: This captures state changes since the beginning of the connection.
- **Control Buttons**: These turn on or turn off key functions associated with the connected device such as the Compressor fan, Evaporator fan, and Lighting Channels.
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