What does DIN Motor Fault mean on a Gardner Denver AirSmart G2?
Short answer: Main motor overload or fault (G2). If your Gardner Denver AirSmart G2 controller is showing DIN Motor Fault, 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 digital input monitoring the main motor tripped on overload or fault, and the controller shut the compressor down.
Which machines show this?
Gardner Denver rotary screw compressors with the second-generation AirSmart G2 controller, the color-display successor to the original AirSmart. The key difference for anyone searching a fault: the G2 displays fault names as plain text — "High Discharge Temp", "Drive 1 Fault", "Change Separator" — while the first-generation AirSmart showed numbered codes like SHUTDOWN #128. If your display shows words with no number, you are on a G2. Shutdowns stop the machine and reset with the STOP button once it has come to rest; advisories keep the machine running and clear from the home screen's upper-right (Gardner Denver logo) button. Many G2 packages pair the controller with a variable frequency drive it supervises.
What causes it?
- Main motor overload tripped after running hot
- High room temperature or blocked motor ventilation
- Motor or overload wiring fault if it trips again after cooldown
Can you fix it yourself?
Sometimes — let the motor cool completely, fix ventilation, reset, and try one restart. A second trip means an electrical cause that plant staff shouldn't chase.
Step by step — what to try, in order:
- Let the motor cool fully before attempting a reset
- Check for high room temperature or blocked motor ventilation
- Press STOP to reset once the machine has stopped, then attempt one restart
When do you need a technician — and why?
Motor wiring and overload checks are high-voltage cabinet work under lockout — the manual assigns them to an electrician or service technician for good reason.
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 DIN Motor Fault mean on a Gardner Denver AirSmart G2 controller?
Main motor overload or fault (G2). The digital input monitoring the main motor tripped on overload or fault, and the controller shut the compressor down.
Can I fix DIN Motor Fault on a Gardner Denver AirSmart G2 controller myself?
Sometimes — let the motor cool completely, fix ventilation, reset, and try one restart. A second trip means an electrical cause that plant staff shouldn't chase.
When does DIN Motor Fault on a Gardner Denver AirSmart G2 controller need a technician?
Motor wiring and overload checks are high-voltage cabinet work under lockout — the manual assigns them to an electrician or service technician for good reason. Call an electrician or service technician if the overload trips again — motor wiring and overload checks are not DIY.
Verified against service documentation: Gardner Denver AirSmart G2 controller documentation for DIN Motor Fault (best-aire.com)