First, narrow it down
What does the actual device show: a dark display, red alarm lights, an over-run warning, or apparently normal pressure gauges with no beer at the taps?
What you're seeing
| Symptom | Possible cause | What to do next |
|---|---|---|
| Blank screen but status lights | Screen asleep | Tap display to wake. |
| Repeated breaker trips | Power or generator fault | Stop resetting; call service. |
| Over-run warning | Extended production/high usage/leak | Record runtime and call. |
| Beer down; generator seems okay | CO₂/blender/downstream valve | Check both supply indicators. |
What to check
Dark screen with red status lights
On some Green Air Supply units the display backlight times out. Tap the screen once to wake it before assuming the separator has lost power.
Dark screen that will not respond
Check the normal power switch, plug, and breaker position only if safe to access. A breaker that trips twice or repeatedly is a reason to stop and call service.
Understand the over-run alarm
Green Air Supply describes an over-run alarm after continuous running beyond a preset limit, often around four hours for its referenced systems. It can signal unusually high nitrogen consumption, a downstream gas leak, or separator trouble. This is not automatically the same as a CO₂ room monitor alarm.
Know that normal cycling is expected
Pressure swing adsorption (PSA) separators often cycle on and off during service. Running continuously even when the bar is closed is more suspicious than normal on-demand cycling.
If beer stops, inspect the read-only gauges
For some Green Air Supply installations, the CO₂ Input and Nitrogen Pressure gauges normally need to be above 80 psi and Carb Blend/Nitro Blend output ports open. Use only the values and valve positions stated on your installed unit, not generic instructions.
Do not improvise a backup hookup
Only connect a backup cylinder if the manufacturer or service provider has instructed your staff on the exact system. Do not change mixture, purity, or pressure settings.
Why it happens
Some generators provide nitrogen for beer-gas blending, but still require a separate CO₂ source. A generator can be fine while a downstream blender or valve has lost its other supply gas.
Need service?
Call for repeated breaker trips, persistent over-run alarms, low output despite normal gauges, or any suspected leak.
Contact us (215) 726-8000