Troubleshooting CO2 Early Run-Out or Leaks on Standup 2.0

Overview

This document will be used to diagnose CO2 leaks in the Bevi Standup 2.0.  If you believe your CO2 tank is emptying more quickly than it should, please follow the steps in this guide to identify and diagnose the leak. This document covers the components in the CO2 system, troubleshooting tips, and possible failure points. 

Symptoms associated with this issue include:

• Machine Alert: CO2 Early Run Out/Leak
  • Bevi has detected that CO2 has depleted faster than anticipated, indicating a potential leak or incorrect tank size was selected during restock.
  • This alert will trigger if CO2 pressure is below 600psi before reaching 20% remaining in CO2 inventory. 
• Frequent CO2 tank replacements required. 
• Sparkling water greys out / reported CO2 runs out much earlier than expected.
• A hissing sound from inside the machine.

NOTE: There are two versions (gens) of the Standup 2.0 CO2 Regulator and Hose Assembly. While the components are slightly different, the troubleshooting steps below apply to both versions.

Required Tools & Materials

• #2 Phillips screwdriver
• Large adjustable wrench
• Spray bottle with soapy water solution

Task 1: Enter the Service Panel to open the door to the Bevi 2.0

1. Touch the Service button in the top left corner of the main dispense screen.
2. Touch "Start Service" on the right side of the screen.
3. Enter the access code “1986”.
   • The door should open.  If it doesn't, press the “Open Door” button.

Task 2: Access the Troubleshooting Tools menu

1. From the main Service Panel screen, touch the “Alerts & Maintenance” button.
2. On the lower left hand side of the Machine Alerts screen, touch “Troubleshooting Tools”

Task 3: Check CO2 pressure

1. The ability to detect leaks will require adequate CO2 pressure in the system.
2. With the CO2 tank connected and opened, check the CO2 pressure reading.
   • Locate the “Data” section of the Troubleshooting Tools menu.
   • In the “Chiller” data, you will find the CO2 pressure reading.
   • To troubleshoot and identify a CO2 leak you need a minimum of 500psi.
     • If there is no or very low CO2 pressure, make sure the CO2 tank is open.
     • If the CO2 pressure is lower than 500psi, check both the high pressure hose, and the CO2 supply tubing for any twist or kinks.
     • If there are no issues with the high pressure hose or the supply tubing, replace the tank to continue troubleshooting. 

Examples of bubbles forming during leaks:

• When testing for leaks using the soapy water mixture, a leak will present with small bubbles seeping from one or more of the connections.  These bubbles may form slowly, so be patient, and be sure to cover the entire fitting or connection with the soapy water mixture.  

Task 4: Locate Source of Leak

1. Inspect the flexible high-pressure hose.
   • Check for any signs of frost or moisture which suggest tiny holes allowing CO2 to escape.
   • If any found, the CO2 assembly needs to be replaced. 

2. Verify there is a CO2 washer installed in the CO2 high pressure hose connection to the tank. 
   • Gen 1 Regulator assemblies will have a grey high pressure hose, with no Anti-Kink Spring at the tank connection. 
   • Gen 2 Regulators will have a black hose, with an Anti-Kink spring at the tank connection. 
   • Gen 1 and Gen 2 CO2 Regulator assemblies require different CO2 washers.  
     • Verify the proper washer is properly installed and not damaged.  
     • Gen 1 Regulators use a white washer with larger inner diameter, that is captive in the tank connection. 
     • Gen 2 Regulators use a green washer with smaller inner diameter, that is not captive in the tank connection. 
   • If the washer is damaged or missing, it will need to be replaced.
     Replacements can be ordered on orders.bevi.co.
     • • Gen 1: 720-0143 - FRU - WASHER, CO2 REGULATOR.
         • 720-0143 is ONLY compatible with Gen 1 Regulators. 
       • Gen 2: 720-0276 - FRU - CO2 REGULATOR GASKET - 5-PACK

3. Using soapy water, spray down all fittings and connections for the CO2 Regulator assembly. Leaks will present with small bubbles coming from the fitting or connection.
   • Check the high pressure hose and all connection points at and around the tank.
   • If leaking from the tank connection, recheck that the nut is properly tightened onto the tank.
   • If leaking from the tank connection and the nut is tightened, check the gasket.
     • The CO2 gasket is held captive inside the nut.  Check for any cracks, tears, or any other damage. 
   • If leaking from any of the other fittings shown below, the high pressure hose assembly may be faulty. 
4. If a leak is found in the high pressure hose, replace the CO2 Regulator Assembly.
5. If no leaks are present, continue to Task 5.

6. Remove the middle panel from the back of the Bevi 2.0.
   • Loosen the 4 screws securing the panel (you do not need to fully remove them).
   • Remove the panel by lifting up and unhooking panel tabs from the mounting screws.

7. Locate the CO2 Pressure Sensor and Regulator Assembly
   • The CO2 Assembly is located in the plumbing shelf in the back side of the Bevi 2.0.  It is mounted with 2 P-Clamps to the right inside wall.  

8. Check the CO2 Pressure Sensor and Regulator Assembly for leaks.
   • From the Troubleshooting Tools menu, pour sparkling water to get CO2 pressure flowing through the regulator assembly.
   • Repeat the soapy water test on all connections and fittings (pictured below).
   • Remember that leaks or bubbles may not present immediately.
   • Be patient and reapply soapy water solution if necessary.
9. If leaks are present in any of the metal threaded fittings, the CO2 Regulator Assembly should be replaced.
   • If there is a leak from the 1/4” tubing connection at the output of the CO2 Regulator, the tubing should be checked to make sure it is fully seated, and is not damaged.
     • If damaged, the tubing can be replaced separately.
10. If no leaks are present, continue to Task 6. 

Gen 1.

Gen 2.

Task 5:  Testing the Chiller connections for leaks

NOTE: THE CHILLER SHOULD NOT BE REMOVED TO PERFORM THIS TEST

1. Apply soapy water solution to the 1/4” CO2 input tubing to the chiller
   • This fitting is a 90 degree elbow, be sure test both the input and output sides of this fitting
2. Apply soapy water solution to the two fittings on top of the chiller
   • These fittings are on the top of the carbonation tank:
     • One black connection push-to-connect fitting
     • One red pressure relief valve
3. If any of these fittings on the chiller present with a leak, the chiller FRU should be replaced.
4. If no leaks are detected at this point, continue on to Task 5 (leak down test).

.

Task 6: Leak Down Test

Even if the tests performed in the previous steps are unsuccessful at diagnosing any CO2 leaks, it is still possible that there is a very slow leak somewhere in the CO2 system.  Using Troubleshooting Tools, we can monitor our CO2 pressure to determine if there is indeed a leak.

1. Turn off the CO2 Tank
   • In the Troubleshooting Tools screen, recheck CO2 pressure.
   • Make sure you are still seeing a minimum of 500psi.
   • Turning off the CO2 tank “locks in” the high pressure side of the CO2 Regulator Assembly.

2. In the “Data” menu within the Troubleshooting Tools screen, monitor the CO2 pressure sensor data.  
3. Monitor the CO2 pressure for a minimum of 30 minutes.
   • Since the high pressure side of the regulator is locked in, a leak would present as a slow, but consistent drop in the pressure reading. 
   • NOTE: CO2 pressure will vary with changes in temperature.  It is normal to see an increase or decrease in the CO2 pressure as the temperature goes up or down.  It is important to monitor the pressure for at least 30 minutes to allow temperature to level out.
4. If the CO2 pressure drops by over 75psi  and continues to drop,  it points to a slow leak in the CO2 system.
   • If there is a leak, the first most likely culprit is the CO2 Regulator Assembly.  
   • Start with replacing the CO2 Regulator Assembly and retest for leaks.  

If after following the above steps does not resolve the issue, please escalate your issue to support@bevi.co

Related Articles

CO2 regulator replacement:

• SU 2.0 "Gen 1" CO2 Regulator Assembly - Remove and Replace with Gen 1 or Gen 2
• SU 2.0 "Gen 2" CO2 Regulator Remove & Replace Guide (NA and UK/EU)

Chiller replacement:

• SU 2.0 (Gen 1) Chiller Remove & Replacement Guide
• SU 2.0 (Gen 2) Chiller - Removal and Replacement Guide (NA and UK/EU)

If you have any further questions please feel free to reach out to our support team at support@bevi.co or 1-866-704-2384