Xizi OTIS Elevator Landing Door Lock XTA-3A

Xizi OTIS Elevator Landing Door Lock XTA-3A is used in elevator landing door locking and floor door safety interlock applications.

This product is normally installed on the landing door side. It helps keep the landing door locked when the elevator car is not at the floor, and it works with the elevator door safety circuit to confirm that the landing door is properly locked before elevator operation.

In the elevator spare parts market, this product may also be searched as:

• Xizi OTIS Elevator Landing Door Lock
• Xizi OTIS XTA-3A Door Lock
• Elevator Landing Door Lock Device
• Elevator Floor Door Lock
• Elevator Door Interlock
• Elevator Landing Door Safety Lock
• KS-3 Replacement Door Lock
• XIOLIFT Door Lock XTA-3A

The main model reference for this page is:

• XTA-3A

Related market reference:

• KS-3

XTA-3A is often used as a landing door lock replacement reference in Xizi OTIS or XIOLIFT elevator spare parts inquiries. Some market descriptions also mention that XTA-3A can be supplied in left, center, and right versions. For this reason, the old lock structure and installation position should be confirmed before ordering.

Used on the Landing Door Safety System

XTA-3A should not be treated as a normal mechanical door lock.

An elevator landing door lock is part of the safety-related door system. It helps prevent the landing door from being opened when the elevator car is not in the correct position. At the same time, the electrical contact or lock signal may be used by the elevator controller to confirm whether the landing door circuit is safe for operation.

If the landing door lock is not matched correctly, the elevator may show door lock fault, fail to start, or stop because the safety circuit is not satisfied.

Left, Center and Right Version Confirmation

For XTA-3A, the installation version is very important.

Some suppliers list this lock with left, center, and right options. These versions may have different lock hook direction, mounting position, mechanical engagement, or installation structure.

Before ordering, buyers should confirm:

• whether the old lock is left, center, or right version
• complete XTA-3A marking if visible
• whether the old lock is related to KS-3 replacement
• front photo of the old lock
• side photo showing the hook direction
• back photo showing the mounting structure
• mounting hole distance
• contact or wiring terminal photo if available
• landing door installation position

A similar-looking landing lock may not fit correctly if the opening side or lock structure is different.

Contact and Door Circuit Check

Some landing door locks may include electrical contact or work with a door lock signal circuit.

Before replacement, technicians should check whether the old lock has a contact, terminal, or wiring connection. If the mechanical lock fits but the contact type or wiring position does not match, the elevator may still report a door lock circuit fault after installation.

For accurate supply, buyers should provide close-up photos of the contact area, wiring terminals, and old lock label before shipment.

When Technicians Usually Replace XTA-3A

Maintenance teams may inspect or replace the XTA-3A landing door lock when the elevator has problems such as:

• landing door not locking correctly
• door lock signal not detected
• elevator cannot start because of door lock fault
• worn lock hook or lock block
• damaged electrical contact
• loose mounting position
• abnormal unlocking or closing action
• repeated landing door safety circuit fault

These symptoms are not always caused by the lock itself. The door alignment, door vane, landing door roller, wiring terminal, door lock circuit, and controller input should also be checked before confirming the lock fault.

Practical Replacement Notes

Do not select Xizi OTIS Elevator Landing Door Lock XTA-3A only by appearance.

Landing door locks may look similar from the outside, but the side version, hook direction, mounting hole position, contact structure, and door system design may be different. Before installation, technicians should compare the old and new lock carefully and test the complete locking and unlocking action.

For overseas buyers, sending clear photos of the original XTA-3A lock from the front, side, back, and installation position is the safest way to reduce wrong supply before shipment.