Drives & MotionABB ACH531 HVAC Drive
Reliable, efficient motor control for HVAC applications
The ABB ACH531 is an industry-specific drive designed for HVAC applications such as fans, pumps, compressors, chillers, air-handling units and cooling towers. With dedicated HVAC control functions, built-in protection, flexible connectivity and simplified commissioning, ACH531 provides a practical solution for reliable HVAC equipment operation.
Built for HVAC. Designed for reliable operation.
The ACH531 combines HVAC-specific software and control functions with a robust drive configuration to simplify installation, commissioning and day-to-day operation.
HVAC-Specific Control
Dedicated HVAC macros and PID controls provide application-specific control schemes designed to simplify HVAC programming and commissioning.
Reliable Performance
Enhanced coated circuit board, minimized airflow through the control-board area and grounding-fault protection. Designed for operation up to 50°C with appropriate derating.
Built-in EMC Protection
A full-power EMC filter is included as standard and conforms to the EN 61800-3 C2 standard, helping reduce high-frequency radiation and interference.
Reduced Harmonics
Built-in double DC reactors help reduce harmonics at nominal load.
Integrated Safety
Built-in Safe Torque Off (STO) as standard, designed according to IEC 61800-5-2 and TÜV Nord certified to SIL 3 / PL e requirements.
Easy Commissioning
The standard configuration includes an HVAC basic control panel with a dedicated HVAC menu, making basic setup and commissioning straightforward.
One drive for a wide range of HVAC applications
The ACH531 is designed for a variety of HVAC equipment and facilities.
Fans
For controlled ventilation and air movement applications.
Pumps
For HVAC pumping and fluid circulation applications.
Compressors
For HVAC and cooling system applications.
Chillers
For controlled operation of cooling equipment.
Air-Handling Units
For building ventilation and climate-control systems.
Cooling Towers
For controlled fan and cooling-tower applications.
ACH531 drives can be applied across civil and commercial buildings, hospitals, data centers, airports and tunnels.
Key technical specifications
- Application
- HVAC
- Power range
- 0.75 – 75 kW
- Supply voltage
- 3-phase, 380 – 480 V
- Supply frequency
- 50/60 Hz ±5%
- Motor voltage
- 0 – UN, 3-phase
- Motor frequency
- 0 – 500 Hz
- Motor control
- Scalar / Vector
- Motor types
- Induction / Permanent magnet
- Power factor
- 0.98
- Efficiency
- 98% at rated power
- Protection rating
- IP21
- Cooling
- Air cooling
- Operating temperature
- -15°C to +40°C without derating
- High-temperature operation
- +40°C to +50°C with derating
- Altitude
- 0 – 1,000 m without capacity reduction
- Relative humidity
- 5 – 95%, non-condensing
Find the right ACH531 for your motor
Choose the drive according to your motor power and current rating.
| Motor power | ACH531 model | Frame | Rated current |
|---|---|---|---|
| 0.75 kW | ACH531-01-02A7-4 | R1 | 2.6 A |
| 1.1 kW | ACH531-01-03A4-4 | R1 | 3.3 A |
| 1.5 kW | ACH531-01-04A1-4 | R1 | 4.0 A |
| 2.2 kW | ACH531-01-05A7-4 | R1 | 5.6 A |
| 3 kW | ACH531-01-07A3-4 | R1 | 7.2 A |
| 4 kW | ACH531-01-09A5-4 | R1 | 9.4 A |
| 5.5 kW | ACH531-01-12A7-4 | R1 | 12.6 A |
| 7.5 kW | ACH531-01-018A-4 | R2 | 17 A |
| 11 kW | ACH531-01-026A-4 | R2 | 25 A |
| 15 kW | ACH531-01-033A-4 | R3 | 33 A |
| 18.5 kW | ACH531-01-039A-4 | R3 | 39 A |
| 22 kW | ACH531-01-046A-4 | R3 | 46 A |
| 30 kW | ACH531-01-062A-4 | R4 | 62 A |
| 37 kW | ACH531-01-073A-4 | R4 | 73 A |
| 45 kW | ACH531-01-088A-4 | R5 | 88 A |
| 55 kW | ACH531-01-106A-4 | R5 | 106 A |
| 75 kW | ACH531-01-145A-4 | R6 | 145 A |
The catalog specifies these ratings for a three-phase 380–480 V supply, with ratings based on nominal 400 V.
Not sure which model you need?
Send us your motor power and application, and our technical team can help you identify the appropriate ACH531 configuration.
HVAC control made simple
ACH531 is designed around HVAC applications, with dedicated functions intended to make commissioning and operation easier.
Scalar & Vector Control
The drive supports both scalar and vector control for precise motor performance and process control. It supports induction motors as well as permanent-magnet motors.
PID Process Control
Dedicated PID functionality helps support HVAC process-control applications.
Flexible Control Panel
Depending on the control mode, the panel can display parameters such as output frequency, motor current and given frequency, or process variables such as actual and given pressure.
Connectivity that fits your system
Standard interfaces
ACH531 comes with a range of standard interfaces for integration with HVAC control and automation systems.
- Built-in Modbus RTU
- Built-in BACnet
- 2 × analog inputs
- 2 × analog outputs
- 6 × digital inputs
- Relay outputs
- Safe Torque Off
- Fieldbus adapter connection
- I/O extension module connection
Optional communication protocols
Additional fieldbus options include:
Safety & compliance
ACH531 incorporates integrated safety and compliance features for industrial and commercial HVAC applications.
Safe Torque Off
Built-in STO is designed according to IEC 61800-5-2 and conforms to the EU Machinery Directive. The catalog states TÜV Nord certification and SIL 3 / PL e requirements.
Certifications & standards
- CE
- Low Voltage Directive
- Machinery Directive
- EMC Directive
- RoHS III Directive
- ECO Directive
- TÜV Nord certification
- EN 61800 series standards
Dimensions & installation
ACH531 is available in multiple frame sizes to accommodate different power ratings.
| Frame | Height | Width | Depth | Weight |
|---|---|---|---|---|
| R1 | 331 mm | 125 mm | 223 mm | 4 kg |
| R2 | 432 mm | 125 mm | 229 mm | 6 kg |
| R3 | 490 mm | 203 mm | 229 mm | 14.5 kg |
| R4 | 636 mm | 203 mm | 257 mm | 18.5 kg |
| R5 | 596 mm | 203 mm | 295 mm | 26.5 kg |
| R6 | 548 mm | 252 mm | 369 mm | 42.6 kg |
Protection rating: IP21 · Cooling: Air cooling
Standard configuration
The standard ACH531 configuration includes key features designed to simplify installation and operation:
- HVAC basic control panel
- Full-power EMC filter
- Double DC reactors
- Built-in Safe Torque Off
- Built-in Modbus RTU
- Built-in BACnet
- Standard I/O interfaces
Additional control panels, fieldbus adapters and I/O extension options are available depending on application requirements.
Need help selecting the right ACH531?
We can help you identify the right drive for your HVAC application.
To recommend the appropriate model, share:
- Motor power: kW
- Motor current: A
- Supply voltage: V
- Application: Fan / Pump / Compressor / Chiller / AHU / Cooling tower
- Quantity: Units
- Communication: Modbus / BACnet / PROFINET / EtherNet/IP / Other
The ACH531 selection process is based on supply voltage, motor power/current and required options.
Technical support & lifecycle services
Choosing the right drive is only the beginning. Support can extend across installation, commissioning, operation and maintenance.
Installation & Commissioning
Support for getting your ACH531 installed and commissioned correctly.
Technical Support & Repairs
Assistance during planned maintenance and unexpected equipment issues.
Spare Parts
Replacement parts and consumables to support continued operation.
Maintenance
Lifecycle support designed around your equipment requirements.
Upgrades & Retrofits
Support for extensions, upgrades and modernization.
Engineering & Consulting
Technical assistance focused on reliability, usability, maintainability and safety.
Training
Professional product and application training.
The ABB catalog describes these services as part of its broader drive lifecycle support offering.