Description
Otis Elevator ACD5 Inverter HCA21305W4 Brief Introduction
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Product Name |
Otis Elevator ACD5 Inverter |
| Model Number |
HCA21305W4 |
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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 ACD5 Inverter HCA21305W4 – High-Performance Power and Precision for Modern Elevators | Nanjing Zhuye Elevator Parts
Behind every smooth elevator ride is a powerful brain that controls speed, torque, and direction with millisecond precision. The Otis ACD5 Inverter HCA21305W4 is that brain. Designed for high-performance elevator applications, this inverter converts DC bus energy into variable-frequency AC power, driving motors up to 30 kW with efficiency, precision, and regenerative capability. When it fails, rides become jerky, levelling suffers, and faults multiply. Nanjing Zhuye Elevator Parts stocks genuine HCA21305W4 inverters, pre-flashed with the latest firmware and ready for same-day despatch—helping you restore premium performance without costly OEM delays.
Product snapshot
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Otis part number HCA21305W4, hardware rev. W4, firmware ACD5-30.7
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30 kW rated, 40 kW 60 s overload, 380-480 V three-phase, 50/60 Hz input
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Output 0-480 V, 0-400 Hz, vector or V/F mode, 4 kHz switching, efficiency > 97 %
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Built-in DC reactor, class A EMI filter, brake chopper 20 kW continuous, 20 % duty
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Dual encoder ports: incremental 5 V / 12 V and absolute EnDat 2.2, 250 kHz max
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Dual safety STO (Safe Torque Off), SIL-3 certified, hardware redundancy
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CAN-FD and RS-485 for real-time speed, torque and health telemetry
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Operating temperature −10 °C to +50 °C, altitude 1 000 m without derating
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IP20 book-style chassis, 400 × 220 × 180 mm, 9.5 kg, through-panel or DIN-rail mount
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Otis Gen2® Life, Gen2® Switch, 4200/5200 high-speed lifts up to 4 m/s, 1 350 kg
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Modernisation packages replacing obsolete ACD4 or six-step drives
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Any controller demanding < 1 % speed ripple and ±2 mm levelling accuracy
Installation method – 30-minute plug-and-play
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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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Remove four mounting screws; slide old inverter out of panel.
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Install new HCA21305W4; torque screws to 1.5 Nm.
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Re-connect mains L1/L2/L3, earth 10 mm², motor U/V/W, brake resistor, encoder, CAN-FD, 24 V logic.
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Power up; green “RDY” LED must illuminate within 3 s, “CAN” LED blinks blue.
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Launch Otis ACD5 Tool (OAT-30) on laptop; auto-tune detects motor parameters in 120 s.
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Run 20 full-speed cycles; verify temperature < 60 °C on heat-sink and no over-current alarms.
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Seal panel; log serial number and firmware v30.7 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, inverters live on the edge of heat and voltage stress. Otis bulletin SB-ACD5-2024-06 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 inverter.
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Replace cooling fan (24 V, 120 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,
– heat-sink temperature > 70 °C with clean filter,
– STO function fails quarterly test.
Pro tip: 60 % of premature failures are traced to loose motor terminals—re-torque to 2.5 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 400 V mains—induced spikes kill gate drivers.
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Keep a spare HCA21305W4 in every service room; at 9.5 kg it fits on a shelf 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 “ACD5 Bundle” (inverter + 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 HCA21305W4 directly from the Czech factory, pre-loading firmware ACD5-30.7 and testing every unit on a 30 kW motor rig for 45 min under full load. Inverters 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-set motor parameters and include a loaner inverter to keep your lifts running during the swap.
Conclusion
The ACD5 Inverter HCA21305W4 is the compact powerhouse 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 HCA21305W4 from Nanjing Zhuye Elevator Parts today—because when the drive stops, the whole building stops.
