Otis Elevator Inverter HVIB Drive Board KDA26800AAZ2 with Energy Regeneration Conformal-Coated Circuit for Direct Replacement

Ot*s Elevator Inverter HVIB Drive Board KDA26800AAZ2, Power PCB For OVFR2B‑403/404 Regenerative Inverter

KDA26800AAZ2, also known as HVIB 403/404 drive board, is the core power driver PCB for Otis OVFR2B‑403/404 regenerative elevator inverter, installed inside machine‑room control cabinet. It integrates IGBT power modules, DC‑link filter capacitors, current‑voltage sensing circuits and signal drive loops. Adopts conformal‑coated circuit board, high‑grade industrial electronic components, strong anti‑vibration and anti‑electromagnetic‑interference performance, stable for long‑time continuous elevator operation. It features energy regeneration function, feeds excess energy back to power grid for energy‑saving effect. Original‑matching interfaces and terminals support direct replacement for faulty unit without hardware modification. Widely used for Otis SKY2 elevator maintenance, fault repair and modernization projects. It solves typical faults including elevator cannot run, inverter report IPM error, over‑current failure and drive circuit breakdown.

Functions

1. Acts as power execution unit of regenerative inverter, receives PWM control signal from main control board, drives IGBT module to output adjustable frequency‑voltage power for elevator traction machine.
2. Realizes regenerative energy feedback during elevator running, reduces power consumption and improves system efficiency.
3. Real‑time monitors bus voltage, output current and IGBT temperature, delivers feedback signal to main controller.
4. Triggers multi‑layer protection such as over‑current, over‑voltage, over‑temperature and short‑circuit, cuts off power output to protect traction machine and inverter hardware.
5. Cooperates with elevator main control system to guarantee smooth start‑up, leveling and stable running performance of lift car.

Rich Content (Working Environment, Notes & Application)

Working ambient temperature:‑10℃ ~ +55℃; Relative humidity ≤90%, non‑condensing. IP20 protection grade, for indoor machine‑room cabinet installation only. Keep away from corrosive gas, conductive dust, water splash and strong electromagnetic interference. Disconnect all power supply fully before disassembly and installation; high‑voltage residual charge exists on filter capacitors, please wait for complete discharge before operation. Professional elevator technicians are required for replacement, inspection and commissioning. Regularly clean dust on board surface and heat sink to prevent overheating damage. Applicable for Otis SKY2 series passenger elevators equipped with OVFR2B‑403 / OVFR2B‑404 regenerative drive system. Common replacement for burnt, aging, faulty original KDA26800AAZ2 board in residential buildings, office and commercial complex elevator renovation jobs.