Why does my Atlas Copco Elektronikon Mk 5 keep shutting down?

Short answer: Mk 5 protective shutdown. If your Atlas Copco GA series (Elektronikon Mk 5) is showing Shutdown (element outlet temperature / motor overload), 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 Elektronikon Mk 5 stops the unit when the element outlet temperature exceeds the programmed shutdown level or when the drive motor or fan motor is overloaded. The shutdown is shown on the display and must be reset after the problem is solved.

Which machines show this?

Atlas Copco GA-series rotary screw compressors fitted with the Elektronikon Mk 5 controller — the graphic-display generation that replaced the Elektronikon II era units. The Mk 5 shows shutdowns and shutdown warnings as on-screen messages with the measured value and the programmed level, lights a general alarm LED for warnings, and clears alarms through a confirm button under a reset icon. Warnings disappear on their own once the condition resolves; shutdowns latch until the problem is fixed and reset. Practical tip: the manual is blunt that repeatedly resetting a shutdown without remedying the cause can damage the machine — write down the tripped value first, fix, then reset once.

What causes it?

• Element outlet temperature over the shutdown level — usually ventilation, ambient, oil level, or dirty coolers
• Drive motor or fan motor overload
• Repeated resets without fixing the cause, which the manual warns can damage the unit

Can you fix it yourself?

For temperature trips, often yes — cool-down plus ventilation, oil-level, and cooler-cleaning checks resolve most. Motor overload trips are not a DIY fix.

Step by step — what to try, in order:

1. Read the shutdown message on the display and note the value that tripped
2. For temperature trips: check ventilation, ambient temperature, oil level and cooler cleanliness after cool-down
3. Solve the problem first — the manual warns that repeatedly resetting without remedying may damage the unit
4. Press the confirm button under the reset icon to clear the alarm, then restart

When do you need a technician — and why?

Any motor overload, or a temperature trip that repeats after basic cooling checks, needs a technician with an ammeter and gauges — resetting blind risks wrecking the airend or motor.

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 Shutdown (element outlet temperature / motor overload) mean on an Atlas Copco GA series (Elektronikon Mk 5)?

Mk 5 protective shutdown. The Elektronikon Mk 5 stops the unit when the element outlet temperature exceeds the programmed shutdown level or when the drive motor or fan motor is overloaded. The shutdown is shown on the display and must be reset after the problem is solved.

Can I fix Shutdown (element outlet temperature / motor overload) on an Atlas Copco GA series (Elektronikon Mk 5) myself?

For temperature trips, often yes — cool-down plus ventilation, oil-level, and cooler-cleaning checks resolve most. Motor overload trips are not a DIY fix.

When does Shutdown (element outlet temperature / motor overload) on an Atlas Copco GA series (Elektronikon Mk 5) need a technician?

Any motor overload, or a temperature trip that repeats after basic cooling checks, needs a technician with an ammeter and gauges — resetting blind risks wrecking the airend or motor. Call service for any motor overload trip or a temperature trip that repeats after basic cooling-system checks.

Verified against service documentation: Atlas Copco GA series (Elektronikon Mk 5) documentation for Shutdown (element outlet temperature / motor overload) (manualslib.com)