1. General Information

• Manufacturer: Mitsubishi Electric (Elevator & Escalator Division)

• Model: LHH-205AG24

• Type: Elevator Car Operation Panel / Display Control Board

• Common Use: Installed inside elevator cars to control button inputs, floor displays, and possibly emergency communication.

2. Key Features & Functions

Primary Functions:

• Button Input Processing – Registers passenger requests (floor selections, door open/close commands).

• Floor Indicator Control – Drives 7-segment LED displays or other indicators to show current floor position.

• Communication Interface – Connects to the main elevator controller (likely via serial or CAN bus).

• Emergency & Alarm Integration – May interface with emergency stop buttons, alarm systems, or intercoms.

Technical Specifications (Estimated):

• Input Voltage: Likely 24V DC or 110V AC (varies by elevator model).

• Display Type: Supports LED or LCD floor indicators (depends on elevator model).

• Button Interface: Matrix or direct wiring for car operation panel buttons.

• Safety Compliance: Meets elevator safety standards (EN 81-20/50, ASME A17.1, etc.).

3. Common Applications

• Used in Mitsubishi NEXIEZ, ELENESSA, or older elevator models.

• Typically found in:

  • Elevator car operation panels (inside the cab).

  • Hall call panels (if compatible with the system).

4. Troubleshooting & Common Issues

Symptoms of a Faulty LHH-205AG24 Board:

• Unresponsive buttons (floor selections not registering).

• Display malfunctions (missing segments, flickering, or no floor indication).

• Elevator freezes or ignores commands.

• Error codes related to car operation panel communication.

Diagnostic Steps:

1. Check power supply (confirm correct voltage to the board).

2. Inspect connectors for loose or corroded pins.

3. Test button inputs with a multimeter (check for signal continuity).

4. Look for burnt components (capacitors, resistors, ICs).

5. Replacement & Sourcing Options

Where to Buy?

• Mitsubishi OEM Suppliers (authorized elevator parts distributors).

• Elevator Parts Specialists (e.g., ELEVATORPARTS.COM, Direct Elevator Parts).

• Used/Refurbished Units (eBay, B2B marketplaces – verify compatibility).

Installation Notes:

• Should be installed by certified elevator technicians (safety & compliance reasons).

• Ensure proper model matching (cross-check with elevator serial number).

Elevator Display - FAQ

Q1: What types of displays are used in elevator systems?
Elevator systems use LED indicators, LCD screens, including TFT LCD displays, and other display technologies to show floor numbers, travel direction, and operating status.

Q2: Are elevator displays with the same screen size interchangeable?
Not necessarily. Displays with the same dimensions may differ in supply voltage, communication protocols, connector configurations, and control requirements. Compatibility must be verified before replacement.

Q3: What causes an elevator floor display to show incorrect information?
Possible causes include communication errors, controller configuration problems, wiring faults, or display module failure. The actual cause should be identified before replacement.

Q4: Can an elevator display be upgraded without replacing the control system?
In some systems, the display can be upgraded separately if the replacement supports the existing controller, communication protocol, and electrical requirements.

Q5: What information is required to order a replacement elevator display?
Please provide the original part number, display type, screen dimensions, supply voltage, communication interface, connector details, controller model, and clear photos for accurate matching.