Description

Otis Car Door Controller GFA24350AW1 Brief Introduction

1. What GFA24350AW1 Really Is

• Power: 24 VDC ±10 %, 40 A peak, 15 A continuous
• Motor: 3-phase PM synchronous, 0.5–1.5 kW, encoder 1,024 ppr
• Control: 32-bit DSP, torque loop 62.5 µs, position loop 1 ms
• Interfaces: CAN-open 125 kbit/s (Otis MC2/MC3) + 0–10 V speed reference
• Protection: IP20 PCB, over-current, over-temp, encoder fault, brake fault
• Regeneration: 4-quadrant IGBT feeds braking energy back to 24 V bus — saves 15 % power
• Size: 220 × 120 × 75 mm — DIN-rail or chassis mount

2. Where It Is Used

• Otis Gen2®, Gen2-Life®, SkyRise® 1.0–4.0 m s⁻¹
• Thyssen TCM-MC2 → MC3 retrofits
• KONE EcoDisc™ modernisation with Otis protocol
• Chinese MRL controllers with 24 VDC door bus
• Suitable for centre-opening or side-opening car doors 800–1,400 mm clear width

3. Commissioning – 20-Minute Plug-and-Play

1. Remove old drive — undo 4 DIN-rail clips; unplug 8-way Molex.
2. Mount AW1 — snap onto rail until latches click; earth strap to PE.
3. Connect plugs:
   • J1: 24 VDC (red/black)
   • J2: motor U/V/W (shielded)
   • J3: encoder A/B/Z + 5 V
   • J4: CAN H/L + shield
   • J5: brake resistor B+/B- (4 Ω, 200 W)
4. Apply 24 V — green LED blinks 1 Hz while loading parameters, then steady.
5. Auto-tune: press and hold TUNE for 3 s; door runs one open/close cycle, stores stator resistance and encoder offset.
6. Run 5 cycles — verify current <8 A, torque ripple <5 %, stop accuracy ±1 mm.

4. Daily Operation – What the Controller Actually Does

• Updates torque every 62.5 µs; stop jerk <0.5 m/s³ — passengers feel nothing
• Auto-compensates for door mass; learns rubber ageing every 24 h
• Built-in 24 h self-test — if encoder drift >0.5 mm, “Car Door Learn Fault” is logged
• Regenerative braking feeds 15 % of door energy back to 24 V bus — saves battery life
• Temperature sensor derates current above 70 °C — no summer shutdowns

5. Replacement Cycle & Preventive Maintenance

• High-traffic metro (>1,500 cycles day⁻¹) – blow dust every 3 months, replace controller every 6 years
• Shopping mall (600–1,000 cycles day⁻¹) – inspect annually, replace every 10 years
• Low-rise office (≤400 cycles day⁻¹) – inspect every 18 months, replace every 12 years

• Green LED stays red (internal 5 V rail fault)
• CAN “EF3 Car Door Drive” logged ≥3 times in 30 days
• Encoder count error >4 pulses per revolution
• Brake resistor temperature >120 °C with normal duty
• EEPROM error 0xE2 after power dip (parameter corrupt)

6. Extending Life – 3 Pro Tips

1. Keep 24 VDC ±5 %; spikes above 30 V destroy the on-board buck converter
2. Torque motor lugs annually; loose connections cause arcing and ozone
3. Clean encoder disk monthly; brake dust creates false counts

7. Why Buy GFA24350AW1 from Nanjing Zhuye Elevator Parts?

• Factory-new, not refurbished; passes 4-hour burn-in at 60 °C and 2,000-cycle door test
• Firmware pre-flashed; matches Otis original checksum, no teach-in required
• Anti-static foam box + silica gel — safe for air freight
• Dual stock: 380 pcs Nanjing, 120 pcs Dubai — next-day delivery to 65 countries
• Bundle kit: controller + 4 Ω brake resistor + 3 m encoder cable — 8 % discount
• 24 months warranty against drift or communication failure
• 7×24 WhatsApp/WeChat video support; average response 10 minutes

Conclusion