Why did my Quincy QGD shut down on element outlet temperature?
Short answer: High element outlet temperature shutdown. If your Quincy QGD 40-60 / QGS 40-100 (Airlogic2 controller) is showing Element outlet temperature shutdown, 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 compressor element outlet temperature exceeded the programmed shutdown level (factory setting 120°C / 248°F) and the controller stopped the compressor. The shutdown is logged in the Event History menu.
Which machines show this?
Quincy QGD 40-60 hp and QGS 40-100 hp rotary screw compressors with the Airlogic2 display controller, including Full Feature packages with the integrated refrigerated dryer. Like Quincy's smaller INFOLOGIC machines, these display icons and text messages, not numbered fault codes — a lit alarm LED means a warning, a flashing one a shutdown, and the specific condition is spelled out on the controller's screens and logged in the Event History menu. Warning and shutdown levels for temperatures are programmed values with factory settings, so your machine's exact trip points can differ. Two habits the manual insists on: the emergency stop does not make the machine voltage-free, and service timer changes go through the authorized distributor.
What causes it?
- Element outlet temperature exceeded the programmed shutdown level (factory 120°C / 248°F)
- Cooling-air restriction, poor ventilation, or recirculating hot air
- Fouled oil cooler or air cooler
- Low oil level — or a bypass valve / element condition problem when it trips again
Can you fix it yourself?
Often — check the Event History for the trip conditions, then cool, clean, ventilate, and correct oil level before one restart. A repeat trip is supplier-level diagnosis per the manual.
Step by step — what to try, in order:
- Let the machine cool completely; check the Event History menu for the recorded conditions at trip
- Check for cooling-air restriction, improve room ventilation, and stop cooling-air recirculation
- With power off, clean the oil cooler and air cooler
- After cooldown and depressurization, check the oil level
- Reset and restart only after the cause is corrected
When do you need a technician — and why?
Bypass valve testing and element condition checks are assigned to the supplier in the manual — and remember the e-stop alone does not make the machine voltage-free; lockout comes first.
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 mean on a Quincy QGD 40-60 / QGS 40-100 (Airlogic2 controller)?
High element outlet temperature shutdown. The compressor element outlet temperature exceeded the programmed shutdown level (factory setting 120°C / 248°F) and the controller stopped the compressor. The shutdown is logged in the Event History menu.
Can I fix Element outlet temperature shutdown on a Quincy QGD 40-60 / QGS 40-100 (Airlogic2 controller) myself?
Often — check the Event History for the trip conditions, then cool, clean, ventilate, and correct oil level before one restart. A repeat trip is supplier-level diagnosis per the manual.
When does Element outlet temperature shutdown on a Quincy QGD 40-60 / QGS 40-100 (Airlogic2 controller) need a technician?
Bypass valve testing and element condition checks are assigned to the supplier in the manual — and remember the e-stop alone does not make the machine voltage-free; lockout comes first. Call a technician if it trips again — bypass valve testing and compressor element condition checks are supplier-level work per the manual.
Verified against service documentation: Quincy QGD 40-60 / QGS 40-100 (Airlogic2 controller) documentation for Element outlet temperature shutdown (compressorworld.com)