Atlas Copco rotary screw compressors are known for reliability and efficiency, but like any advanced machine, they sometimes display error messages. One of the more confusing issues operators face is the Motor Converter Time Out error. This warning typically indicates a problem with the Variable Speed Drive (VSD) or its connection to the motor. If ignored, it can lead to downtime, lost productivity, and costly repairs.
In this guide, we’ll explain what causes Atlas Copco motor converter time outs, how to troubleshoot them, and when it makes more sense to replace rather than repair. We’ll also recommend some of the best Atlas Copco and alternative compressors available today.
Quick Picks: Best Compressors with Advanced Controls
- Best Overall: Atlas Copco GA Series Rotary Screw Compressor – Advanced electronics with reliable diagnostics.
- Best Budget: Ingersoll Rand 2545K10-V Reciprocating Compressor – Simpler design with fewer electronics, excellent for heavy-duty shops.
- Best Premium: Kaeser CSD Series Rotary Screw Compressor – Quiet, efficient, and highly reliable motor controls.
Buyer’s Guide: Understanding Motor Converter Time Outs
When an Atlas Copco compressor shows a motor converter time-out code, it usually points to communication failure between the control unit and the drive. Here are the most common causes:
- Electrical Faults: Power surges, poor grounding, or weak supply voltage.
- Loose Connections: Damaged or loose wiring between the VSD and motor.
- Overheating: Poor ventilation around the drive can cause time-outs.
- Failed Sensors: Faulty thermistors or control board sensors may trigger false time-outs.
- Software Errors: Outdated firmware or corrupted software in the controller.
Basic Troubleshooting Steps:
- Power down and restart the compressor controller.
- Check electrical connections and ensure proper grounding.
- Inspect cooling fans and ensure airflow is not blocked.
- Reset error codes via the control panel.
- If errors persist, consult Atlas Copco service support.
⚠️ If your compressor is older and constantly throwing time-out codes, the cost of replacing drives or boards may exceed the value of a new unit.
Detailed Product Reviews: Best Alternatives & Replacements
1. Atlas Copco GA Series Rotary Screw Compressor
Who it’s for: Shops wanting the latest Atlas Copco technology with dependable motor controls.
- Key Benefits:
- Smart electronic monitoring
- Quiet operation
- Energy-efficient drive system
- Pros: Reliable diagnostics, premium brand support
- Cons: Higher cost than competitors
Final Verdict: The go-to replacement if you trust Atlas Copco. Check price
2. Ingersoll Rand 2545K10-V Reciprocating Compressor
Who it’s for: Buyers tired of electronic issues, wanting simpler mechanics.
- Key Benefits:
- Two-stage reciprocating design
- 30+ CFM output
- 10 HP motor
- Pros: Rugged, easy to repair, fewer electronics
- Cons: Louder than rotary screw compressors
Final Verdict: An excellent value for industrial users. View deal
3. Kaeser CSD Series Rotary Screw Compressor
Who it’s for: Professionals seeking quiet, efficient, and durable compressors with advanced controls.
- Key Benefits:
- Energy-saving Sigma profile rotors
- Intelligent controller reduces downtime
- Low noise output
- Pros: Very quiet, highly efficient, strong support
- Cons: Premium pricing
Final Verdict: A great alternative to Atlas Copco with world-class efficiency. See pricing
4. Sullivan Palatek Rotary Screw Compressor
Who it’s for: Shops needing maximum airflow and robust construction.
- Key Benefits:
- Industrial-grade durability
- High CFM delivery
- 24/7 duty rating
- Pros: Rugged, reliable, high output
- Cons: Larger footprint
Final Verdict: Built for heavy-duty users. Check availability
5. Saylor-Beall Reciprocating Compressor
Who it’s for: Buyers wanting traditional, cast-iron reliability with minimal electronics.
- Key Benefits:
- Hand-built cast iron pump
- Long service life
- Simple mechanical design
- Pros: Low maintenance, traditional durability
- Cons: Bulkier and noisier than screw models
Final Verdict: A solid, low-tech alternative. View price
6. Quincy QSI Rotary Screw Compressor
Who it’s for: Industrial users wanting U.S.-made reliability with strong controls.
- Key Benefits:
- High-efficiency rotary screw design
- Electronic monitoring system
- Built for continuous duty
- Pros: Long lifespan, excellent service network
- Cons: Costs more than reciprocating models
Final Verdict: A trusted industrial solution. See deal
Comparison Table
| Model | Type | CFM Output | Key Feature | Price Link |
|---|---|---|---|---|
| Atlas Copco GA | Rotary Screw | 40+ CFM | Smart electronic controls | Check Price |
| Ingersoll Rand 2545K10-V | Reciprocating | 30+ CFM | Simpler, rugged mechanics | View Deal |
| Kaeser CSD | Rotary Screw | 40–100 CFM | Ultra-efficient, quiet | See Offer |
| Sullivan Palatek | Rotary Screw | 50+ CFM | Heavy-duty industrial build | Check Price |
| Saylor-Beall | Reciprocating | 15–30 CFM | Traditional cast iron durability | View Price |
| Quincy QSI | Rotary Screw | 50+ CFM | U.S.-made, continuous duty | See Deal |
FAQ
What does “Motor Converter Time Out” mean on an Atlas Copco compressor?
It indicates the Variable Speed Drive (VSD) is not properly communicating with the motor, often due to electrical or software issues.
Can I clear the error code myself?
Yes, by cycling power or pressing the reset button on the controller. But the underlying cause must be fixed to prevent repeat time-outs.
What are the most common fixes?
Checking connections, verifying proper grounding, cleaning cooling fans, and updating firmware are the top fixes.
Do I need to replace the VSD?
If basic fixes don’t work, a failing VSD may need replacement—a costly repair. In older compressors, replacement may be more economical.
Should I replace my compressor instead of repairing?
If your compressor is older than 10–15 years and parts are costly or unavailable, upgrading to a new system often saves money long term.
Conclusion
Atlas Copco motor converter time outs can often be cleared with basic troubleshooting—checking wiring, ventilation, and resets. But when errors persist, it’s a sign of deeper electrical or drive issues. If repairs are too costly, replacing with a reliable modern system may be the best option. For most shops, the Atlas Copco GA Series offers the smoothest upgrade, while the Ingersoll Rand 2545K10-V provides a rugged, simpler alternative. High-end buyers will find Kaeser CSD or Quincy QSI models excellent investments.
Don’t let downtime eat into your business—shop the best industrial compressors today and keep your operation running smoothly.