❄ Compressor Code Lookup

Air compressor tripped on a fault code?

176 documented fault codes across Atlas Copco, Gardner Denver, Ingersoll Rand, Kaeser, Quincy, and Sullair, verified against service manuals — what each one means, what to check yourself, and when it's a tech call.

Atlas Copco24 codes documentedGardner Denver29 codes documentedIngersoll Rand33 codes documentedKaeser32 codes documentedQuincy25 codes documentedSullair33 codes documented

Find your controller

Every code on this site is filed by brand and by the controller that displays it, because the same fault can read differently from one controller to the next. Match the name on your display or in your manual:

  • Atlas Copco - Elektronikon controllers (Elektronikon II regulator, Mk 5, Touch and Graphic) on GA and GA VSD machines.
  • Gardner Denver - AirSmart and AirSmart G2 controllers.
  • Ingersoll Rand - Intellisys on SSR machines, and Xe-series controllers.
  • Kaeser - Sigma Control and Sigma Control 2.
  • Quincy - QSI standard controls, INFOLOGIC and Airlogic2.
  • Sullair - Sullair Touch Screen (STS), WS, Supervisor and ShopTek controllers.

Warning or shutdown?

Most controllers sort their messages into two levels. A warning (Kaeser marks these with a W; Gardner Denver calls them advisories) means the machine is still running but a limit is getting close: a filter loading up, a temperature climbing, a service interval coming due. A shutdown or alarm (Kaeser marks these with an A) means the controller has already stopped the compressor to protect it. A warning is your chance to fix a small problem cheaply. A shutdown needs its cause found before you restart.

Either way, write down the exact code and message before you reset anything. One reset is diagnosis; if the same fault comes back, the condition behind it is real, and the code page will tell you what to check yourself and when it is time for a technician.

Local service

Nashville, TNLocal repair & serviceBirmingham, ALLocal repair & service

Guides

Why does my rotary screw compressor keep tripping on high temperature?
The most common compressor shutdown there is — and the checklist that fixes most of them without a service call.
Why is my air compressor running but not building pressure?
Motor's running, gauge isn't moving. The short list of real causes and how to narrow it down fast.
What maintenance does a rotary screw compressor actually need?
Every service item on the controller's reminder list maps to a specific fault code you'll see later if you skip it.
How do you read the fault codes on your air compressor's controller?
Six brands, each with its own controller language. Identify yours and go straight to the right code list.
Why does my air compressor keep shutting down?
Repeated shutdowns are the machine protecting itself from one of five things. Identify which before the next reset.
Why is there water in my compressed air lines?
Every compressor makes water — gallons of it in humid weather. The question is why yours is reaching the tools.
What size air compressor does my shop need?
It's CFM, not horsepower — and both oversizing and undersizing cost you real money every month.
Equipment still down? If you're in Middle Tennessee or Central Alabama, see who services industrial air compressors near you:
Nashville, TN →  ·  Birmingham, AL →