Description
Otis MCB-Ⅲ inverter motherboard GCA26800KF1 Brief introduction
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Product Name |
Otis MCB-Ⅲ inverter motherboard |
| Model Number |
GCA26800KF1 |
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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 MCB-III Motherboard GCA26800KF1 – Setup, Integration & Replacement Guide
Nanjing Zhuye Elevator Parts – OEM stock, global shipping, 24/7 support
Nanjing Zhuye Elevator Parts – OEM stock, global shipping, 24/7 support
The GCA26800KF1 is the 32-bit Power-PC heart of every Otis MCB-III controller shipped since 2016. Mounted on the main rack, this board hosts the 400 MHz CPU that runs the SIL-3 safety task, manages real-time CAN traffic, stores 90 days of fault logs and still provides spare Ethernet for Otis REM remote monitoring. A single brown-out on the 24 V rail or a cracked CAN transceiver will throw a “7x” fault and shut the entire group down. Nanjing Zhuye Elevator Parts keeps hundreds of factory-flashed GCA26800KF1 motherboards in Rotterdam and Nanjing so you can restore full traffic the same shift. Below is an 800-word field manual that explains correct usage, on-site programming and the replacement cycle that keeps your elevators secure, connected and code-compliant.
1. What the GCA26800KF1 does
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400 MHz Power-PC 5200 with dual CAN, RS-485 and 10/100 Ethernet PHY
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512 MB NAND flash for event logs, 64 MB DDR for real-time tasks
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Dual-redundant safety CPU (external via SPA) achieving SIL-3 / PLe Cat. 3
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Battery-backed RTC and 256-bit AES encryption for REM cloud link
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UL/CE listed to EN 81-20/50 and CSA B44.1 for 15-year design life
2. Tools to carry
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GCA26800KF1 motherboard (Nanjing Zhuye part #OT-MCB3-GCA26800KF1) in anti-static bag
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2 mm & 3 mm flat screwdrivers, TX10 Torx
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Otis Service Tool (OST) laptop with MCB-III 7.x licence key
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RJ-45 and USB-to-CAN adapters (shielded)
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Multi-meter with min/max capture
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Lock-out / tag-out kit
3. Installation – 30 minutes if you back-up first
Safety: place all cars on group inspection, open the main disconnect and verify 0 V on the 24 Vdc rail.
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Photograph every J-number jumper – especially J8 (safety version) and J15 (REM enable).
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Remove six TX10 screws; slide the old board out of the card guides.
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Transfer the micro-SD card (firmware + car parameter file) and the CR2032 battery.
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Insert the new GCA26800KF1; torque screws to 1.0 N·m.
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Re-connect flat cables J1 (power), J2 (CAN-A), J3 (CAN-B), J4 (SPA), J7 (Ethernet).
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Apply power – STATUS LED blinks green 3 times then solid; ETH LED flashes during DHCP.
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Launch OST → Controller → Parameter Upload; select the XML back-up created earlier.
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Run SIL-3 safety verification – must show 100 % pass.
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Remove inspection, run 5 full-speed cycles and log the serial number in CMMS.
4. Functional test – prove it to the inspector
a) Safety string continuity: <0.1 Ω across XSA1-XSA2.
b) CAN-A/B error frames: <1 % during 30 min run.
c) Ethernet ping to REM gateway: <50 ms, 0 % loss.
d) Battery voltage: 3.0 V ±0.1 V; low-battery LED off.
e) Export OST report and attach PDF to site file.
b) CAN-A/B error frames: <1 % during 30 min run.
c) Ethernet ping to REM gateway: <50 ms, 0 % loss.
d) Battery voltage: 3.0 V ±0.1 V; low-battery LED off.
e) Export OST report and attach PDF to site file.
5. Preventive maintenance schedule
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Monthly – visual sweep for swollen capacitors or corroded CAN terminals.
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Quarterly – measure 24 Vdc ripple (<100 mV) and case temperature (<55 °C).
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Annually – export fault log; clear buffers after review.
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Every two years – replace CR2032 battery and apply latest cybersecurity patch via OST.
6. Replacement cycle – environment decides
Otis specification: 15 years. Nanjing Zhuye analytics refine this:
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Light duty (<150 starts/day, HVAC room): 18 years
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Standard duty (150–400 starts, residential): 15 years
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Heavy duty (>400 starts, hospital, mall): 12 years
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High ambient (>45 °C, rooftop cabinet): 10 years – capacitor life halves every 10 °C rise.
Replace immediately if:
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STATUS LED red double-blink – dual CAN failure
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Ethernet port unresponsive – lightning-damaged PHY
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RTC loses time <24 h – battery leakage corroding pads
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Fault buffer shows “NVRAM error” – flash wear-out after 100 k writes
7. Eco-disposal & warranty
Return the old board in the prepaid anti-static box; Nanjing Zhuye recovers gold, copper and aluminium and issues a €15 recycling credit. Every GCA26800KF1 ships with a 24-month replacement warranty, extendable to 60 months when you join our annual battery-and-patch program.
8. Why buy from Nanjing Zhuye Elevator Parts
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450 units in stock, Rotterdam & Nanjing, flashed with latest cybersecurity firmware
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Factory-sealed Otis packaging with hologram and serial database – no grey-market clones
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QR code on box links to parameter template and 5-minute swap video
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24/7 technical hotline staffed by ex-Otis commissioning engineers
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Bundle pricing: buy 5 boards and get a free CR2032 battery kit plus freight credit
9. Bottom line
A red-status motherboard is the fastest way to a building-wide shutdown. Keep a genuine, pre-flashed GCA26800KF1 on every truck, swap it in 30 minutes, and your elevators will stay safe, connected and compliant for the full 15-year design cycle. Order today from Nanjing Zhuye Elevator Parts – the fastest route from “fault code” to “perfect traffic.”
