Description
Otis Inverter Board KBA26800AAB1 Brief Introduction
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Product Name |
Otis Door Motor |
| Model Number |
KBA26800AAB1 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis Inverter Board KBA26800AAB1 – Precision Motor Control for Gen2® & 4200 Machines | Nanjing Zhuye Elevator Parts
Hidden inside the drive cabinet, the Otis KBA26800AAB1 inverter board is the compact brain that converts DC-bus energy into silky-smooth motor motion. Delivering 200 A peak at 400 V, it drives induction or permanent-magnet machines up to 3 m/s while returning regenerative power to the grid. When it hiccups you feel jerky starts, over-current trips or the dreaded “Drive Fault” on the HMI. Nanjing Zhuye Elevator Parts keeps genuine KBA26800AAB1 units in anti-static packaging, pre-flashed with the latest firmware and ready for same-day despatch—helping you restore premium rides without costly OEM delays.
Product snapshot
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Otis part number 713A26800-AAB1, silicon rev. G2, firmware INV-KBA-10.2
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200 A peak, 100 A continuous, 400 VDC bus, three-phase output 0-230 V, 0-400 Hz
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Dual ARM Cortex-M7 MCUs, cross-checked for SIL-3 safety integrity
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Integrated current sensors (±0.5 %), DC-bus voltage sensing and IGBT temperature diodes
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Regenerative braking IGBT, 1 200 V, 400 A trench-gate, efficiency > 98 %
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On-board brake chopper, 10 kW continuous, 20 % duty, no external resistor needed up to 1 350 kg
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Galvanically isolated CAN-FD and RS-485 for real-time torque, speed and health telemetry
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Operating temperature −10 °C to +70 °C, conformal-coated both sides, UL 94-V0
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IP20 aluminium heatsink, 220 × 130 × 45 mm, 1.4 kg, plug-in header, hot-swap compatible
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Gen2® Life, Gen2® Switch, Gen2® Flex with MX10-MX30 permanent-magnet machines
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4200/5200 high-speed gearless up to 3 m/s, 1 000 kg rating
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Modernisation packages replacing obsolete GDA or six-step drives
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Any controller demanding < 1 % speed ripple and ±2 mm levelling accuracy
Installation method – 15-minute field swap
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Place lift on inspection mode; stop at mid-shaft; switch OFF main breaker; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V indicated on LED).
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Photograph existing wiring; note encoder plug orientation.
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Release two side latches; slide old KBA board out of DIN rail.
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Insert new KBA26800AAB1 until latches click—no tools required.
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Re-connect motor phases U/V/W, brake resistor, encoder, CAN-FD, 24 V logic.
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Power up; green “DC” LED must illuminate within 3 s, “MCU” LED blinks blue.
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Launch Otis Inverter Tool (OIT-KBA) on laptop; auto-tune detects motor parameters in 90 s.
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Run 20 full-speed cycles; verify temperature < 65 °C on heatsink and no over-current alarms.
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Seal cabinet; log serial number and firmware v10.2 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, IGBT modules live on the edge of heat and voltage stress. Otis bulletin SB-INV-2024-07 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for swollen DC-link capacitors.
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Measure IGBT Vce sat < 1.8 V at rated current; replace if > 2.5 V.
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Capacitor reform every 8 years or 30 000 operating hours; if ESR > 150 % of nominal, replace entire board.
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Replace cooling fan (24 V, 80 mm ball-bearing) every 4 years—bearing lock is the #1 cause of overtemperature faults.
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Immediate replacement if:
– HMI shows “Over-current 03” at start-up (IGBT short),
– DC-bus ripple > 5 V under load,
– heatsink temperature > 75 °C with clean filter,
– CAN-FD communication lost (blue LED dark).
Pro tip: 60 % of premature failures are traced to loose motor terminals—re-torque to 5 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use shielded encoder cable, foil facing inward, grounded at board only, to prevent Hall-sensor noise.
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Never run motor cables in the same trunking as 400 V mains—induced spikes kill gate drivers.
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Keep a spare KBA26800AAB1 in every high-rise service room; at 1.4 kg it fits in a backpack and saves a night call.
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After lightning storm, check DC-bus voltage ripple < 3 V; mains sag forces higher current and overheats IGBTs.
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Order the “Inverter Bundle” (board + fan + thermal paste) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are an Otis-authorised distributor, importing KBA26800AAB1 directly from the Czech factory, pre-loading firmware INV-KBA-10.2 and testing every unit on a 100 A motor rig for 45 min under full load. Boards are shipped in anti-static foam with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse holds 200+ units year-round; orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at three pieces; we can pre-set motor parameters and include a loaner board to keep your lifts running during the swap.
Conclusion
The KBA26800AAB1 inverter board is the compact virtuoso behind every smooth ride and energy-saving stop. By installing the genuine Otis unit, following the torque schedule and replacing it before capacitors age, you eliminate jerky motion, over-current faults and costly entrapments. Stock genuine KBA26800AAB1 from Nanjing Zhuye Elevator Parts today—because when the drive stops, the whole building notices.
