Description
Otis Elevator Inverter Board KEA26800ACC1 Brief Introduction
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Product Name |
Otis Elevator Inverter Board |
| Model Number |
KEA26800ACC1 |
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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 Elevator Inverter Board KEA26800ACC1 – Precision Motor Control for Gen2® & 4200 Systems | Nanjing Zhuye Elevator Parts
Smooth rides, accurate levelling and energy savings all depend on one credit-card-sized brain: the Otis KEA26800ACC1 inverter board. This 400-A, 400-V IGBT-based drive controls the traction motor and regenerative brake in Gen2® and 4200 elevators, converting DC-bus power into variable-frequency, variable-voltage sine waves with milli-Hertz accuracy. When it falters, expect jerky starts, over-current faults or sudden shutdowns. Nanjing Zhuye Elevator Parts keeps genuine KEA26800ACC1 units in anti-static packaging, flashed with the latest firmware and ready for same-day despatch to any continent.
Product snapshot
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Otis part number 713A26800-ACC1, silicon revision G2, firmware bundle INV-7.3.4
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400 A peak, 200 A continuous, 400 VDC bus, three-phase output 0-230 V, 0-400 Hz
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Dual ARM Cortex-M7 MCUs running cross-check for SIL-3 safety integrity
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Integrated current sensors (±0.5 % accuracy), DC-bus voltage sensing and IGBT temperature diodes
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Regenerative braking IGBT with 1 200 V, 600 A trench-gate technology, efficiency > 98 %
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On-board brake chopper, 15 kW, 20 % duty, eliminates external resistor modules on most Gen2® jobs
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Galvanically isolated CAN-FD and RS-485 ports for real-time torque, speed and health telemetry
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Operating temperature −10 °C to +70 °C, full load without derating to 55 °C
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Conformal-coated both sides, flame class UL 94-V0, RoHS and CE compliant
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Weight 1.1 kg, dimensions 270 × 165 × 38 mm, plugs into front-access header, hot-swap compatible
Where it works
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Gen2® Life, Gen2® Switch, Gen2® Flex with MX10, MX20 or MX30 permanent-magnet machines
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4200/5200 high-speed gearless up to 4 m/s, 1 350 kg rating
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Modernisation packages replacing obsolete SCR or six-step drives
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Any Otis 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 for easy reach.
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Switch OFF main breaker and inverter supply; 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 board out of guide rails.
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Insert new KEA26800ACC1 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 “BUS” LED must illuminate within 3 s, MCU status LED blinks blue.
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Launch Otis Inverter Tool (OIT-7) on laptop; auto-tune detects motor parameters in 60 s.
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Run 20 full-speed cycles; verify temperature < 65 °C on heat-sink and no over-current faults.
Replacement cycle & preventive maintenance
Although solid-state, inverter boards live on the edge of thermal and electrical stress. Otis bulletin SB-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 100 A; 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, 120 mm) every 4 years—bearing lock is #1 cause of thermal shutdown.
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Immediate replacement if:
– HMI shows “Over-current 03” at start-up (IGBT short),
– DC-bus ripple > 5 V under load,
– heat-sink 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 inverter only, to prevent Hall-sensor noise.
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Never run motor cables in the same trunking as 230 V mains—induced spikes kill gate drivers.
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Keep a spare KEA26800ACC1 in every high-rise service room; at 1.1 kg it fits in a lunchbox 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 channel partner, importing KEA26800ACC1 directly from the Czech factory, pre-loading firmware INV-7.3.4 and testing every unit on a 200 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 150+ 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-program motor parameters and include a loaner board to keep your lifts running during the swap.
Conclusion
The KEA26800ACC1 inverter board is the silent 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 KEA26800ACC1 from Nanjing Zhuye Elevator Parts today—because when motor control fails, the whole building notices.
