Description
Otis Elevator Car Top Power Board DAA26801-ICU-12V/24V Brief Introduction
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Product Name |
Otis Elevator Car Top Power Board |
| Model Number |
DAA26801-ICU-12V/24V |
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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 Car Top Power Board DAA26801 – 48 V of Reliable Muscle for Brakes, Lights & Door Motors | Nanjing Zhuye Elevor Parts
Tucked inside the car-top station, the Otis DAA26801 power board is the unsung heart of every Gen2® and 4200 installation. It converts 230 V AC into a regulated 48 V DC bus, feeds the brake coil, door operator, emergency lighting and even charges the evacuation battery. When it stumbles, the symptom can be anything from a soft brake to a dark cab. Nanjing Zhuye Elevator Parts keeps factory-fresh DAA26801 boards on the shelf for global 24-hour shipment, helping technicians restore full power without costly OEM delays.
Product snapshot
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Otis part number 713A26801-B04, latest silicon revision F3, backward compatible with −B02/−B03
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3-phase 220 V ±10 % 50/60 Hz input, 2 A rms; output 48 V DC ±1 %, 10 A continuous, 20 A 30 s boost
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Integrated PFC (power-factor > 0.95) and 4 kV surge suppression, meeting EN 61000-4-5
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Dual on-board SMPS: primary 48 V/10 A, secondary 24 V/2 A for logic and light-barrier
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Hot-pluggable 48 V battery connector, auto-current-limited 3 A charge profile for 22–45 Ah AGM packs
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CAN 2.0B interface for voltage, current and temperature telemetry to car controller
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Operating temperature −10 °C to +55 °C, full load without derating up to 45 °C
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IP20 aluminium heatsink, 300 × 150 × 75 mm, 2.1 kg, DIN rail or chassis mount
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RoHS, CE, UL 508 and Otis QES 2024 approved
Where it works
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Gen2® Life, Gen2® Switch, Gen2® Flex MRL with side or centre-opening doors
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4200/5200 gearless high-speed lifts with 48 V brake and door operator
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Modernisation packages replacing obsolete analog 56 V transformer-rectifier decks
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Any Otis controller expecting 48 V ±2 % bus stability under 5 % line sag
Installation method – 10-minute swap
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Place lift on inspection mode; raise car to mid-shaft for easy access.
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Switch OFF main breaker and car-top isolator; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V indicated on on-board LED).
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Photograph existing wiring; note battery connector keying.
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Remove four M4 screws; slide old board out of DIN rail.
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Install new DAA26801 until latches click; torque screws to 1.2 Nm.
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Re-connect L1/L2/L3, earth 6 mm², 48 V bus bars, battery plug, CAN-H/L.
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Power up; green “48 V” LED must illuminate within 3 s, CAN status LED blinks blue.
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Check HMI: 48.0 ±0.5 V, battery charge 2.1 A tapering to 0.3 A, heatsink < 45 °C.
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Run 20 continuous door cycles; verify no under-voltage alarms (< 46 V).
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Seal cabinet; log serial number and firmware v4.7 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, power semiconductors live on the edge of thermal runaway. Otis bulletin SB-2023-18 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 48 V ripple < 200 mV pk-pk at full load; replace if > 500 mV.
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Replace cooling fan (24 V, 60 mm ball-bearing) every 4 years—bearing lock is #1 cause of overtemperature faults.
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Capacitor reform every 8 years or 25 000 operating hours; if ESR > 120 % of nominal, replace entire board.
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Immediate replacement if:
– HMI shows “48 V Under-volt” at start-up (output FET short),
– battery fuse blows repeatedly (> 3 A indicates internal charger failure),
– heatsink temperature > 75 °C with clean filter,
– CAN telemetry stuck at 0 V (isolated DC-DC failure).
Pro tip: 60 % of premature failures are traced to loose bus-bar connections—re-torque to 3 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use copper paste on bus-bar joints—galvanic corrosion between copper and aluminium raises resistance and overheats traces.
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Never run the lift with battery disconnected; the board relies on battery damping to suppress voltage spikes.
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Keep a spare DAA26801 in every high-rise service room; at 2.1 kg it fits in a backpack and saves a night call.
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After lightning storm, check PFC choke for cracks—surge current can fracture the ferrite core.
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Order the “Power Bundle” (board + fan + bus-bar kit) 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 DAA26801 boards directly from the Czech factory, pre-loading firmware v4.7 and testing every unit on a 10 A resistive load for 60 min. Boards are shipped in anti-static bags 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-install DIN rails and include a loaner board to keep your lifts running during the swap.
Conclusion
The DAA26801 car-top power board is the silent powerhouse behind every brake lift, door open and emergency light. By installing the genuine Otis unit, following the torque schedule and replacing it before capacitors age, you eliminate mysterious voltage faults, battery boil-offs and costly entrapments. Stock genuine DAA26801 from Nanjing Zhuye Elevator Parts today—because when 48 V dies, the whole car stops.
