Troubleshooting & Glossary
This guide covers glossary of terms and troubleshooting for common issues like Fill Time Out, foam control, and Wi-Fi error codes 5379 or 28674. Ensuring you get the most out of your RAPT Can Filler.
Glossary of Terms
Minimum Fill Rate
The minimum liquid height increase required per second to maintain the cycle. (Default: 2.00mm/s)
Fill Time Out
The maximum time allowed for a fill cycle to complete before the unit stops due to the Minimum Fill Rate not being achieved.
Empty Pressure
The ambient atmospheric pressure reading captured during the calibration process.
Calibration Factor
The calculated pressure change (kPa per mm) determined during calibration.
Fill Count
Total successful fills completed during the current session.
CPM (Cans Per Minute)
Current production speed based on the frequency of completed fills.
AFT (Average Fill Time)
The average duration (in seconds) to complete a single fill cycle in the current session.
Filling Troubleshooting
Fill Time Out Error (settings)
Decrease Min Fill Rate: The rate may be set too high for your vessel (Default 2.0mm/s).
Increase Fill Time Out: Give the unit more time to reach the goal (Default 5s).
Adjust Wait Time: Increase the pause between purge and fill (Optimum: 0.5s–1.5s).
Check Gas Line: Use a glass of water to check for leaks in the gas tube; check the Diagnostics menu to see if pressure is dropping. Cut or replace any areas of damage.
Fill Time Out Error (User/Environment)
Too Much Foam: Foam prevents the sensor from reading the liquid level correctly. Chill liquid further, increase line resistance, or lower transfer pressure.
Transfer Speed: If the flow is too slow, the min fill rate won't be hit. Increase pressure/speed.
Vessel Width: Very wide vessels fill "slower" in terms of height per second.
Inconsistent Fills
Residual Pressure: Increase "Wait Time" in presets (0.5s minimum) to allow purge pressure to stabilisze before filling.
"Purging, Wait, Ready" (No Fill)
Recalibrate: The calibration values are too close together. Ensure Empty Pressure is ~0.000 ±0.03 and Calibration Factor is ~0.01000 ±0.002 kPa/mm.
Pressure Sensor Error
Kinked/Blocked Line: Check for liquid or kinks in the external gas line. If clear, remove the housing screws to inspect the internal gas line connection.
Connection & Registration Troubleshooting
RAPT Network Not Visible
Ensure Wi-Fi is enabled in Settings.
Reboot unit for 30 seconds.
Check Diagnostics: If an IP is shown, it’s already connected.
"No Internet" on Phone
Select "Forget Network" or ignore the prompt; internet isn't needed for the setup portal. Then connect again
Connection Failed
Check Band: Must be 2.4GHz (not 5GHz).
Check Password & Wi-Fi Name: Remove non-alphanumeric characters (e.g., #, !, ?).
Unsecured: Device cannot connect to networks without a password.
Reboot your modem/WiFi router
Try connecting to a different Wi-Fi network
Turn off any VPN or anything that can block an outgoing signal on the router
Install optional Antenna Upgrade to improve WiFi connectivity
Missing Validation Code
Connect the device to your W-iFi network; then Update the firmware - select Check for OTA update in Settings
Error Registering Device
Check that the device firmware is up to date - select Check for OTA update in the DIagnostics screen
The Validation Code may have timed out. Reboot the device by unplugging it for at least 30 seconds, then plugging it back in. Log out of the RAPT Portal and log back in
If the above steps do not work, reboot the network that the device is connected to. Once the network has rebooted, reboot the device by unplugging it for at least 30 seconds, then plugging it back in. Log out of the RAPT Portal and log back in. Note: if using a modem and seperate Wi-Fi routers, reboot the modem and then the Wi-Fi routers in that order.
A corrupt firmware install can prevent registration. This can happen if a firmware download is interrputed, for example. If the above steps do not allow registration, please refer to RAPT Device Boot Loop Troubleshooting & Recovery Mode to rollback firmware to a good version, then update to the current version
Determine whether your device is connected to Wi-Fi
To check this navigate to Diagnostics and check that it shows your network’s IP address next to IP (STA) - in the form 192.168.XX.XXX or similar. You can also check the WiFi AP (Access Point ) the device is connected to and the current WiFi signal strength
Determine whether your device is registered to the RAPT Portal
If the message "Register your device by pressing the select button to enter the main menu, then selecting the "Register Device" item in the main menu" is displayed, this is not registered. Please follow the steps outlined in Register Device
Cannot update firmware | 5379 Error
This is a network issue. The OTA Firmware Update could not be validated or was incomplete. Ensure your device is as close as possible to the router. Check signal strength in Diagnostics
Ensure you have a strong 2.4gHz WiFi signal (not just 5gHZ). Check your signal strength against this table
Make sure there are no VPNs in use, or filters or other potential issues set up in the router that can block an outgoing signal
If issues persist, reboot the device and also the modem
If the above do not work, see Using Phone as Hotspot below
Cannot update firmware | 28674 Error
This is a network issue. The OTA Firmware Update could not be validated or was incomplete. Ensure your device is as close as possible to the router. Check signal strength in Diagnostics
Error 28674 is an error opening an HTTP connection. Check your modem or router settings. A VPN, Firewall or other setting may be blocking outgoing connections - this is a common reason for this error
Ensure you have a strong 2.4gHz WiFi signal (not just 5gHZ). Check your signal strength against this table
If issues persist, reboot the device and also the modem.
If the above do not work, see Using Phone as Hotspot below.
SIgnal Strength
Using Phone as Hotspot
If updating the firmware persistently fails or throws an error, and all troubleshooting steps have failed, then try using your mobile phone as a Hotspot to resolve this.
Using the phone as a Hotspot will typically solve firmware update issues of this kind
1: It helps eliminate potential network or modem/router issues which can cause problems that can be hard to isolate and resolve
2: It can help eliminate signal strength or poor WiFi connection issues as the phone can be positioned right next to the RAPT device when in Hotspot mode.
To connect to the phone Hotspot and update the firmware there are a few steps to follow
On the phone, turn WiFi OFF. When troubleshooting firmware download or network issues, we do not want to use the same network thus the phone must be disconnected from the WiFi network in order to do this
Enable Personal Hotspot (sometimes just called Hotspot) on your phone. This is typically located under the WiFi or Network menu in the Settings menu of the phone. On IOS this is under Settings/Personal Hotspot. The menu names will vary on Android depending on device
Enable Maximise Compatibility (on IOS) or 2.4gHz Network Only (on Android - again, this will have different names depending on device/OS). This will help minimise issues when connecting
Once Hotspot is enabled on the device, following the steps in Getting Started to connect to the phone Hotspot
Once connected, navigate to Settings/Check for OTA update on the RAPT Device
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