A newly installed elevator that vibrates, has unusual door movement or stops out of level needs to be checked before use. Elevator installation errors can arise in construction work, mechanical installation or electrical controls. This article helps investors recognise mistakes and understand what to check before handover.

6 common elevator installation errors

Not every elevator malfunction originates in installation. However, when unusual signs appear during testing, the installation team needs to check the equipment, site conditions and adjustment procedures. Investors should pay attention to the following 6 groups of issues.

1. Incorrect shaft dimensions or insufficient installation clearance

A shaft built differently from the drawings may not accommodate the equipment or provide sufficient technical clearance. Mistakes often result from incomplete surveys, construction based on reference dimensions, or design changes that have not been incorporated into the drawings.

The following points need to be checked against the drawings:

• Shaft width and depth: These must suit the selected equipment, rather than merely provide space for the car.
• Shaft verticality: This needs to be checked over the entire travel, rather than measured only at the lowest floor.
• Pit depth: This must meet the drawings for the actual model.
• Clearance above the highest stop: This must accommodate the equipment arrangement and technical space.
• Door openings and finished floor levels: These must match the landing door positions.

Illustrative example: A homeowner changes the flooring material after the drawings have been agreed. If the new finished level is not updated, the sill position may no longer be suitable.

When a discrepancy is found, the elevator provider and construction contractor need to agree on a solution. Structural elements should not be broken out or altered simply to make the equipment fit.

See also: Elevator pit depth and construction considerations. Preparation and shaft checks in the elevator installation process

2. Incorrect alignment of guide rails and mechanical connections

Guide rails direct the car and counterweight along their designed travel. Rails that are not straight, unsuitable joints or insecure connections can contribute to vibration and unusual noise.

Checks extend beyond the rails. The installation team also needs to examine the car frame, guide shoes, traction machine base and rope system for the equipment configuration. These parts must be measured and aligned according to the drawings and the manufacturer’s instructions.

Investors can note the floor where a noise occurs or when the car vibrates. However, technicians must identify the cause and make adjustments. No single tolerance applies to every component and model.

3. Unsuitable power supply or incorrect control wiring

A power supply that is not ready can interrupt testing and handover. Incorrect signal wiring, insecure connections or an unstable supply can also cause the system to report faults.

The following items need to be checked:

• A power supply appropriate for the agreed configuration.
• Cables, protective devices and earthing according to the design.
• Connections to the controller, motor, doors and sensors.
• The safety circuit, limit switches and related functions.

4. Unstable landing doors, car doors or floor levelling

Misaligned doors, an unadjusted drive or construction dust in the sill can cause uneven door movement. Noticeable signs include scraping noises, doors closing then reopening, or the elevator failing to accept a travel command.

The installer needs to check door operation on every floor, the locking mechanism and door protection devices. Floor levelling must also be checked so users can enter and leave conveniently.

Do not test sensors by placing hands, feet or any part of the body in the closing path. If the doors behave unusually, investors should request a technical inspection instead of continuing operation to observe them.

5. Inadequate waterproofing, shielding and equipment storage

Water entering the pit, an unprotected shaft or damp equipment storage can affect installation quality. Outdoor elevators also require measures to control rain entering the doors and shaft.

Early preparations should include:

• Pit waterproofing: Check it before equipment is brought in for installation.
• Shaft shielding: Limit rainwater, falling objects and construction dust.
• Equipment storage: Provide a dry area and protect the equipment from impact.
• Schedule coordination: Prevent nearby construction work from affecting equipment already installed.

Illustrative example: The landing doors have been installed while plastering and floor laying continue. Without proper protection, mortar and dust can enter the door sills.

6. Missed testing, safety checks or handover documentation

An elevator travelling up and down does not mean it is ready for use. Functions need to be checked for the configuration, from door movement and levelling to emergency communication and power-failure rescue, if fitted.

Checks should not be shortened to meet the building’s handover date. If any item remains unsatisfactory, record the issue, identify the responsible party and check again after rectification.

Viet Chao has separately explained acceptance, inspection and handover documentation. Investors can use this information to avoid receiving only the keys without operating documents.

See also: Elevator handover, acceptance records and key considerations. Home elevator inspection before putting equipment into service

Which signs need checking after elevator installation?

Investors do not need to diagnose technical faults themselves. It is more useful to record the symptoms accurately and notify the responsible provider. The following table is for reference and does not replace an elevator technician’s findings.

Backup components such as rescue batteries also need checking according to the equipment instructions. Travel functions should not be the only focus while communication and incident-support systems are overlooked.

Can fault codes identify elevator installation errors?

Fault codes support diagnosis when an elevator develops a problem. They can indicate some installation errors, although their scope is limited. Codes must be interpreted using the correct model, controller and technical documentation. The same symbol may mean something different on another system.

When the elevator reports a fault, provide:

• The model and equipment identification number, if available.
• A photograph of the displayed fault code.
• The floor and time of the incident.
• Symptoms before the elevator stopped.
• Information about any power failure or construction near the elevator.

Do not repeatedly reset the system, open the controller cabinet or bypass safety devices to clear faults. Restarting does not mean the cause has been resolved.

Checklist to reduce mistakes before construction and handover

Effective prevention starts before the equipment arrives on site. Investors should agree on inspection milestones and responsible personnel from the outset. The following checklist suggests how to coordinate work and should be adapted to the contract and actual scope.

When an item is unsatisfactory, record the issue, responsible person and completion deadline. This helps prevent the construction and elevator teams from each assuming that the other is responsible.

See also: Elevator installation from mechanical work to testing

What should you do if a fault is found before or after handover?

Before handover, ask the responsible provider to inspect, rectify and reconfirm any unsatisfactory item. After handover, report unusual symptoms promptly, keep incident records and check the warranty scope. Responsibility must be based on the actual cause, rather than simply when the fault appeared.

If there are signs of danger, stop using the elevator and notify management and technicians. If trapped in the car, use the emergency communication device, remain calm and wait for rescuers. Do not force the doors open or attempt to climb out.

For Shanghai Mitsubishi elevators, replacement parts needed during repairs must be checked for the correct code, supply source and compatibility. Under SMEC’s advisory, genuine parts must not be used to assemble products bearing another trade name without official approval. Advertising a “Mitsubishi joint-venture elevator” should not be treated as proof of authenticity. Parts of unknown origin carry risks of counterfeiting, imitation and incompatibility.

See also: Why the origin of elevator replacement parts matters

Frequently asked questions about elevator installation errors

Does vibration in a newly installed elevator definitely mean incorrect installation?

No. Checks are needed to distinguish mechanical issues, adjustments, equipment problems and site conditions. A conclusion should not be based only on how the journey feels.

Can incorrect shaft dimensions be corrected?

A solution may be possible, but it must be assessed against existing conditions, the structure and the equipment model. Do not break out structural elements or change dimensions before a technical solution has been agreed.

Should the elevator be used while awaiting fault rectification?

The elevator should not be put into service before faults have been assessed and addressed appropriately. In particular, stop using it when there are abnormalities involving doors, levelling, electricity or operating safety.

Who is responsible if a fault is found after handover?

The cause needs to be identified and checked against the contract, warranty scope and each party’s responsibilities. Investors should report specific information and retain inspection and rectification records.

Viet Chao supports elevator installation quality control

Reducing elevator installation errors requires coordination from drawings and construction to testing and handover. Viet Chao was established in 2004, became a Shanghai Mitsubishi dealer in 2009 and provides consulting, installation and maintenance solutions. The company’s technical process includes mechanical checks, electrical connections and trial operation before handover.

If you are building a home or preparing to install an elevator, you can send drawings, the project location and usage requirements via hotline 0898 55 28 88. Viet Chao will advise on installation conditions and coordination requirements, helping investors prepare in advance and reduce unexpected corrective work.