Yaskawa Z1B1B021 Z100 Inverter Drive Controller

The Yaskawa Z1B1B021 Z100 bypass inverter drive is a heavy‑duty variable frequency drive with bypass circuitry for continuous operation in HVAC and industrial motor control applications powered by 480V three‑phase power. It is a 15 HP, 480 VAC, 3‑phase unit rated for 50/60 Hz and 21.2 A, providing adjustable motor speed while maintaining continuity through bypass during maintenance or fault conditions. This wall/panel‑mounted, industrial‑grade enclosed VFD is compatible with Yaskawa Z100 HVAC drive systems and is commonly used in pumps, fans, air handling units, compressors, chilled water systems, and other automated motor control applications in commercial HVAC and industrial settings. As a legacy Z100 series device, it is typically available through surplus and replacement markets, with common replacements including the Z1B1B018PMG, GA800 Drive, and CIMR-ZU4A0011FAA.