A drive built for washdown and weather can still be the wrong drive for the fan. On May 27, 2026, ABB expanded its IP66 / UL Type 4X lineup [1], and those drives will start showing up on HVLS retrofit quotes. Before you price one, get the full drive part number and the fan maker's approved motor-and-controls combination.
Which ABB drive is on the quote?
ABB sells the ACS580 as its general-purpose drive, the ACH580 for HVACR and the ACQ580 for water and wastewater [1]. Its examples include food plants, rooftop air handlers, cooling towers and exterior supply and exhaust fans. HVLS fans aren't on the list, and none of those examples tells you a drive will work with a particular fan.
The June 17, 2026 leaflet gets specific. It covers the ACH580-01 IP66/Type 4X, option +B063, in 5.5 to 22 kW sizes on three-phase 380 to 480 V [2]. Those specs belong to that one variant, not to every ACH580 or ACS580. And 5.5 kW is the smallest size, so check it against a single small fan before you assume it fits.
Put the sun shield on the order
The leaflet lists operation down to -20°C, derating from 40°C to 50°C, and a keypad display good from -15°C [2]. It also requires a sun shield for any outdoor spot in direct sunlight, even though ABB calls the enclosure UV-resistant.
That's a line item, and it costs money. Walk the location for sun, temperature swings and cooling clearance, and order the right enclosure. IP66 and UL Type 4X are two different ratings, and neither one replaces the installation manual.
ABB also lists a built-in DC choke, an EMC C2 filter, two expansion slots and EIA-485 that speaks BACnet MS/TP and Modbus RTU. The Bluetooth keypad is optional [2]. Match the keypad, I/O and communications on the order to the building's sequence of operation.
The bypass drive is a different product
ABB's January 31, 2026 release covers ACH580 vertical bypass packages, with UL Type 12 and Type 4X options on its E-Clipse Bypass platform [3]. Same ACH580 name, different package from the stand-alone IP66 drive above.
Before you propose bypass on an HVLS fan, find out whether the motor, speed control and required stops allow it, and whether the fan maker supports it. Put the exact series and option codes on the submittal. Two products that share a name don't share wiring.
Review the complete replacement
You need the supply, motor data, allowed speed range, controller, fieldbus, external I/O and every required shutdown. Pull the exact manuals and get the fan maker to approve the combination. A drive having safe torque off doesn't make it an approved fire-alarm shutdown.
An enclosure rating also says nothing about airflow, comfort, CFEI or energy savings. Don't let it slide into the sales pitch.
ABB's September 29, 2026 announcement with NOVENCO is about an axial fan sold as one package with its motor and drive, for ventilation [4]. Its performance estimates don't carry over to an overhead HVLS fan. What goes on your purchase order is still the exact package, its install limits and the controls arrangement the fan maker approved.
Sources
[1] ABB, ABB expands portfolio with new IP66 / Type 4X drives for demanding environments, May 27, 2026: https://new.abb.com/news/detail/136092/abb-expands-portfolio-with-new-ip66-type-4x-drives-for-demanding-environments
[2] ABB, ACH580-01 IP66/Type 4X drive, 5.5 to 22 kW, leaflet 9AKK108472A7668, REV A EN, June 17, 2026. Product landing page with documentation links: https://new.abb.com/us/us-motion-business-area/drives-products/ach5804X
[3] ABB, ABB Expands HVACR Low Voltage Drives Portfolio with New UL Type 12 and Type 4X Vertical Bypass Drives, January 31, 2026: https://new.abb.com/news/detail/133088/expands-hvacr-VFD-portfolio-new-ul-type-12-and-type-4x-vertical-bypass-drives
[4] ABB, ABB and NOVENCO target cooling’s energy waste with a turnkey fan package, September 29, 2026: https://new.abb.com/news/detail/139081/abb-and-novenco-target-coolings-energy-waste-with-a-turnkey-fan-package