First, narrow it down
Are both CO₂ and nitrogen available at the blender, or did the failure start after a cylinder change, generator alert, or maintenance visit?
What you're seeing
| Symptom | Possible cause | What to do next |
|---|---|---|
| CO₂ available; nitrogen empty | Blender may shut down | Restore nitrogen through supplier. |
| Nitrogen available; CO₂ empty | Blender may shut down | Restore CO₂ through supplier. |
| Both inputs present; no outlet | Blender/control/valve fault | Call for service. |
What to check
Check whether all blended-gas taps are affected
If standard CO₂-only draft or soda still works but blended-gas beer does not, the blender or one of its two gas inputs is a stronger suspect.
Read both incoming supply gauges
McDantim’s Trumix information states that the blender shuts off if either CO₂ or nitrogen supply is unavailable. Note both readings and any alarm lights without adjusting the regulators.
Check a nitrogen generator if one feeds the blender
If the separator has an over-run warning, low gauge pressure, or repeated power trips, resolve that source first. Generating nitrogen does not eliminate the need for CO₂.
Check known shutoff valves
If a trained employee closed a marked supply valve during a delivery, verify its normal position using the facility’s equipment instructions.
Do not swap gas connections or change mix ratios
A blend intended for one style or long-draw setup may not suit another. McDantim says some blender ratios are factory-set and not adjustable in the field.
Document whether it is pressure or output missing
Both supply gauges normal but no blender outlet is a different fault from a genuinely empty gas source. Write down what the display and outlet indicators show.
Why it happens
CO₂ keeps beer carbonation in balance; nitrogen allows certain systems to push beer over distance without adding too much CO₂. The mixture and applied pressure are designed together.
Need service?
Call when both gases appear available but output is missing, or when a blender will not restart after the normal supplies are restored.
Contact us (215) 726-8000