How do I reset the emergency stop pictograph on a Quincy QGS?
Short answer: Emergency stop activated. If your Quincy QGS 20-30 (INFOLOGIC controller) is showing Emergency stop (e-stop pictograph), the controller has logged a specific, documented condition. This page covers what it means, what causes it, what you can safely fix yourself, and when — and why — it takes a technician.
What exactly is the machine telling you?
The emergency stop button was pushed and the compressor stopped immediately. The alarm LED flashes and the emergency stop pictograph is shown.
Which machines show this?
Quincy QGS 20-30 hp rotary screw compressors with the compact INFOLOGIC controller, including tank-mounted and integrated-dryer variants. There are no numbered fault codes on this controller: it communicates with LEDs and pictographs — a flashing temperature symbol, a motor symbol, an e-stop symbol, a service wrench — plus small scrollable screens (like d.06 for service-timer hours). Identifying a fault means reading which pictograph is lit or flashing and whether the alarm LED is steady (warning) or flashing (shutdown). Warnings clear themselves when the condition passes; shutdowns need the cause corrected and the unit reset. Larger QGS machines from 40 hp up use the different Airlogic2 controller instead.
What causes it?
- The emergency stop button was pushed and is still locked in
- Whatever prompted the e-stop hasn't been resolved
Can you fix it yourself?
Yes — resolve the cause, pull the e-stop button out, press the reset key, and restart with the start button.
Step by step — what to try, in order:
- Resolve whatever caused the emergency stop to be pressed
- Unlock the e-stop button by pulling it out
- Press the reset key on the controller
- Restart the compressor with the start button
When do you need a technician — and why?
If the unit won't reset with the button released, the safety circuit needs tracing in the electrical cabinet — and if nobody knows why it was e-stopped, restarting an undiagnosed machine is the real risk.
If it does come to a service call and you're in Nashville, TN or Birmingham, AL, we maintain independently compiled lists of local companies that service industrial air compressors — real businesses with verified contact information, none of whom paid to be listed.
Related questions
What does Emergency stop (e-stop pictograph) mean on a Quincy QGS 20-30 (INFOLOGIC controller)?
Emergency stop activated. The emergency stop button was pushed and the compressor stopped immediately. The alarm LED flashes and the emergency stop pictograph is shown.
Can I fix Emergency stop (e-stop pictograph) on a Quincy QGS 20-30 (INFOLOGIC controller) myself?
Yes — resolve the cause, pull the e-stop button out, press the reset key, and restart with the start button.
When does Emergency stop (e-stop pictograph) on a Quincy QGS 20-30 (INFOLOGIC controller) need a technician?
If the unit won't reset with the button released, the safety circuit needs tracing in the electrical cabinet — and if nobody knows why it was e-stopped, restarting an undiagnosed machine is the real risk. Call for service if the unit will not reset or the reason for the emergency stop is unknown.
Verified against service documentation: Quincy QGS 20-30 (INFOLOGIC controller) documentation for Emergency stop (e-stop pictograph) (airenergy.com)