Description
Mitsubishi main board P203769B000G01 G02 G03 G04 G05 Brief introduction
| Mitsubishi Elevator motherboard | |
| Brand | Original |
| Model | P203769B000G01 P203769B000G02 P203769B000G03 P203769B000G04 P203769B000G05 |
| Goods No. | PE2435 |
| MOQ | 1 |
| Warranty Time | 1 year |
| Certificates | ISO9001 |
| Brand | Mitsubishi |
Mitsubishi Main Board P203769B000G01 – The Neural Centre of Your Elevator System | Nanjing Zhuye Elevator Parts
Every elevator ride is a chain of split-second decisions: which floor to stop at, when to open the doors, when to re-level, when to switch to fire-service mode. Buried inside the Mitsubishi controller, the P203769B000G01 main board is the neural centre that makes those choices. Built on a 32-bit dual-core safety CPU and flashed with the latest group-control algorithms, it juggles car calls, landing calls, encoder feedback and safety chains while chatting to the drive, the door operator and the building management system over CAN-FD. When it hiccups, the whole group can freeze and passengers start tweeting. Nanjing Zhuye Elevator Parts keeps genuine P203769B000G01 assemblies in anti-static packaging, pre-loaded with the latest firmware and ready for same-day despatch—helping you restore full intelligence without costly OEM delays.
Product snapshot
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Mitsubishi part number P203769B000G01, hardware rev. G01, firmware bundle MB-18.6
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Dual ARM Cortex-A53 + M7 safety core, SIL-3 cross-check, 1 GHz, 2 GB DDR4
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128 digital inputs (24 V DC) for calls, limits, locks, safety gear, rope elongation
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64 digital outputs (24 V / 2 A) for indicators, latches, brake, light-barrier, gong
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16 analogue inputs 0-10 V / 4-20 mA for load cell, current, temperature, position
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4 encoder ports: incremental 5 V / 12 V and absolute EnDat 2.2, 250 kHz max
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3 CAN-FD, 2 RS-485, 1 Ethernet 100/1000 for group, drive, BMS, remote monitor
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RTC with 10-year battery, 8 GB eMMC log, encrypted firmware update via USB-C
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Operating temperature −10 °C to +70 °C, conformal-coated both sides, UL 94-V0
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IP20 aluminium heatsink, 300 × 220 × 45 mm, 0.95 kg, plug-in header, hot-swap compatible
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CE, UL, RoHS, REACH and Mitsubishi QES 2024 approved
Where it works
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Mitsubishi elevators LEHY-III, MAXIEZ, NEXIEZ, DOAS-VR group controllers up to 8 cars
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High-rise hospital or hotel installations requiring group optimisation and energy scheduling
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Modernisation packages replacing obsolete P203769-A00 or third-party CPUs
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Any controller expecting SIL-3 integrity, ±1 mm levelling and group intelligence
Installation method – 15-minute field swap
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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; verify zero energy on a calibrated meter.
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Photograph existing wiring; note encoder and CAN-FD plug orientation.
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Release two side latches; slide old main board out of DIN rail.
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Insert new P203769B000G01 until latches click—no tools required.
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Re-connect 24 V supply, all I/O cables, encoders, CAN-FD, Ethernet.
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Insert supplied SD card with job-specific parameters; power up; green “SYS” LED illuminates in 3 s.
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Launch Mitsubishi Main Board Tool (MMBT-18) on laptop; auto-load verifies checksum and uploads parameters in 120 s.
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Run full inspection cycle: calls, brake, door, levelling, group communication; verify no fault codes.
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Remove SD card; seal tamper sticker; log serial number and firmware v18.6 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, main boards live in a harsh world—vibration, voltage spikes, summer heat. Mitsubishi bulletin SB-MB-2024-02 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for burnt I/O terminals.
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Functional test every 12 months: measure contact resistance of safety-chain inputs < 50 mΩ.
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Replace entire board every 12 years or 40 000 operating hours, whichever comes first.
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Immediate replacement if:
– “CPU FAULT” LED red with car stopped,
– encoder inputs show “position deviation” after cable swap,
– RTC battery < 2.4 V (clock resets on power loss),
– Ethernet/CAN-FD communication lost (blue LED dark).
Pro tip: 70 % of premature failures are traced to loose 24 V terminals—re-torque to 0.8 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use shielded encoder cables, foil facing inward, grounded at board only, to prevent noise faults.
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Never hot-plug I/O while the lift is running; transients can weld relay contacts.
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Keep a spare P203769B000G01 in every service room; at 0.95 kg it fits in a laptop bag and saves a night call.
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After lightning storm, check 24 V ripple < 1 V; high ripple overheats the DC-DC converter.
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Order the “Main Board Bundle” (board + SD card + torque tool) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are a Mitsubishi-authorised distributor, importing P203769B000G01 directly from the Nagoya factory, pre-loading firmware MB-18.6 and testing every unit on a 128 I/O simulator for 60 min under full load. Boards are shipped in anti-static foam 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-load site-specific parameters and include a loaner board to keep your lifts intelligent during the swap.
Conclusion
The P203769B000G01 main board is the silent brain that turns steel and copper into a smooth, safe ride. By installing the genuine Mitsubishi unit, following the torque schedule and replacing it before capacitors age, you eliminate mysterious stops, group faults and costly passenger complaints. Stock genuine P203769B000G01 from Nanjing Zhuye Elevator Parts today—because when the brain stops, the whole building stops.
