Why did my Quincy QGS 20-30 shut down on element outlet temp?
Short answer: High element outlet temperature shutdown. If your Quincy QGS 20-30 (INFOLOGIC controller) is showing Element outlet temperature shutdown (alarm LED flashing), 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 element outlet temperature exceeded the shut-down level of 110°C / 230°F and the controller stopped the compressor. The alarm LED flashes and the automatic operation LED goes out.
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?
- Element outlet temperature exceeded the 110°C / 230°F shutdown level
- Compressor-room ventilation or ambient temperature out of spec
- Fluid level low
- Dirty coolers — or thermostatic valve, internal cooler, or airend problems when it repeats
Can you fix it yourself?
Often — cool it down, fix ventilation, top up fluid, clean the coolers, and restart once the cause is corrected. A second high-temperature shutdown means professional repair.
Step by step — what to try, in order:
- Switch off the voltage and let the machine cool completely
- Check and correct compressor-room ventilation and ambient temperature
- After cooldown and full depressurization, check the fluid level and top up if needed
- With the unit off, clean dirt off the coolers
- Switch the voltage back on and restart only once the condition is corrected
When do you need a technician — and why?
Thermostatic valve and internal cooler work means opening the pressurized fluid system — the manual forbids opening any plug or fitting until the unit is stopped, cooled, and depressurized.
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 Element outlet temperature shutdown (alarm LED flashing) mean on a Quincy QGS 20-30 (INFOLOGIC controller)?
High element outlet temperature shutdown. The element outlet temperature exceeded the shut-down level of 110°C / 230°F and the controller stopped the compressor. The alarm LED flashes and the automatic operation LED goes out.
Can I fix Element outlet temperature shutdown (alarm LED flashing) on a Quincy QGS 20-30 (INFOLOGIC controller) myself?
Often — cool it down, fix ventilation, top up fluid, clean the coolers, and restart once the cause is corrected. A second high-temperature shutdown means professional repair.
When does Element outlet temperature shutdown (alarm LED flashing) on a Quincy QGS 20-30 (INFOLOGIC controller) need a technician?
Thermostatic valve and internal cooler work means opening the pressurized fluid system — the manual forbids opening any plug or fitting until the unit is stopped, cooled, and depressurized. Call a technician if the machine shuts down on high temperature again — thermostatic valve, internal cooler, or airend problems need professional repair.
Verified against service documentation: Quincy QGS 20-30 (INFOLOGIC controller) documentation for Element outlet temperature shutdown (alarm LED flashing) (airenergy.com)