What does 1AVPT Failure mean on an Ingersoll Rand compressor?
Short answer: Sensor failure trip (1AVPT, 2APT, 3APT, 4APT, 2ATT, 3ATT, 5OTT). If your Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) is showing 1AVPT Failure (Sensor Failure), 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?
Shutdown trip: the controller recognized one of its pressure or temperature sensors as missing or broken, and displays which one in the format '1AVPT Failure'. Warning-level sensor failures (5OPT, 7ATT, 10APT) let the unit keep running.
Which machines show this?
Ingersoll Rand Sierra oil-free rotary screw compressors running the larger Xe-145M controller. Because these are two-stage oil-free machines with a separate bearing lubrication circuit, the fault set looks different from the flooded-screw R-series: plain-text warnings like Change Inlet Filter and Change Oil Filter, hard trips for bearing oil pressure and temperature, and sensor faults reported by tag name — 1AVPT Failure, 2ATT, 5OTT and so on — naming the exact transducer or probe involved. Practical tip: write down the sensor tag exactly as displayed before resetting; that tag maps to one specific instrument on the machine, and it is the difference between a five-minute service call and a guessing game.
What causes it?
- The named sensor (1AVPT, 2APT, 3APT, 4APT, 2ATT, 3ATT, or 5OTT) reading as missing or broken
- Loose or damaged connector or cable on that sensor
- A genuine sensor failure if the same one faults again
Can you fix it yourself?
Sometimes — note exactly which sensor is named, check its connector and cable powered down, and reset once.
Step by step — what to try, in order:
- Note exactly which sensor name the display shows before resetting
- With the unit powered down, check that sensor's connector and cable for damage or looseness
- Reset and see whether the sensor reading returns to a plausible value
When do you need a technician — and why?
A repeating sensor fault needs testing and replacement on a pressurized oil-free machine — a service job, because the controller cannot protect what it cannot measure.
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 1AVPT Failure (Sensor Failure) mean on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary)?
Sensor failure trip (1AVPT, 2APT, 3APT, 4APT, 2ATT, 3ATT, 5OTT). Shutdown trip: the controller recognized one of its pressure or temperature sensors as missing or broken, and displays which one in the format '1AVPT Failure'. Warning-level sensor failures (5OPT, 7ATT, 10APT) let the unit keep running.
Can I fix 1AVPT Failure (Sensor Failure) on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) myself?
Sometimes — note exactly which sensor is named, check its connector and cable powered down, and reset once.
When does 1AVPT Failure (Sensor Failure) on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) need a technician?
A repeating sensor fault needs testing and replacement on a pressurized oil-free machine — a service job, because the controller cannot protect what it cannot measure. If the same sensor faults again, call a technician to test and replace it — sensor swaps on a pressurized oil-free machine are a service job.
Verified against service documentation: Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) documentation for 1AVPT Failure (Sensor Failure) (ifixcompressors.com)