Mekisan

Mekisan Door Card Technical Service

Mekisan door cards are at the core of the system controlling the open-close cycle of the elevator door. Since the door side endures the most frequent cycles in the elevator, faults and adjustment problems most commonly occur here: the door does not close, reopens while closing, stops midway, slams shut, the lock condition is not established, and the elevator goes out of service. Users often say “the elevator is broken,” but the root cause can be the door card, door motor, photocell/light barrier, or mechanical friction. At Poyraz Endüstriyel, our goal in Mekisan door card service is not only to make the card operational but also to reduce the recurrence of faults.

Although door card faults appear electronic, many problems in the field are mixed. When rails and guides get dirty and friction increases on the door leaf, the motor draws more current; the card detects overcurrent and may open the door back as a safety measure. If the photocell alignment is disturbed, the door stops closing, interpreting it as an obstacle. If the lock contact has a poor connection, even if the door physically closes, the “locked” signal does not register, preventing elevator movement. Therefore, proper service evaluates not only the card but also the door system signals and mechanical conditions.

What is a Mekisan Door Card?

The Mekisan door card is an electronic control board that drives the elevator door motor and monitors door safety inputs. It manages the door’s opening-closing speed, torque, and smooth motion; and by reading signals such as photocell/light barrier, limit switches, and lock contacts, it ensures the door closes safely. Even if the elevator drive and control system are intact, the elevator may not operate if the door card malfunctions because the locking condition does not occur.

Key functions of the door card include:

• Driving the door motor in open/close directions
• Adjusting speed and torque profiles (vibration-free movement)
• Ensuring safe reopening when an obstacle is detected
• Reading door open/closed limits
• Generating lock signals/door ready signals

Thus, the door card is a critical component for both comfort and safety in the elevator system.

How is a Mekisan Door Card Repaired?

Repairing a Mekisan door card starts with distinguishing whether the fault originates from the card or from the field equipment. Because a jammed mechanism, weakening motor, or continuously triggered photocell input can falsely present the card as “faulty.” When you repair the card and reinstall it in the same environment, the problem may recur.

Our service approach:

• Fault description: Does the door not move at all, reopen while closing, stop midway, or fail to lock? This determines the test scenario.
• Visual inspection: Burn marks, discoloration, swollen capacitors, overheated connectors on the card.
• Power supply check: Is the card’s power stable? Low or fluctuating supply can cause resets and unstable outputs.
• Input-output verification: Are photocell, limit, and lock inputs read correctly? Poor contacts cause erratic door behavior.
• Motor drive circuit repair: If motor drive outputs are faulty, the motor either doesn’t turn or turns weakly.
• Functional testing: Open-close cycle, obstacle scenario (photocell triggering), limit, and lock logic verification.

A door card repair is not considered successful without repeated testing as door card faults often appear intermittently and may not be evident in short tests.

Mekisan Door Card Faults and Symptoms

In the field, Mekisan door card faults generally manifest with the following symptoms:

Door does not open or close at all:

• The card power supply may be absent or unstable.
• Motor drive output may be faulty.
• Energy transmission might be interrupted due to overheated connectors/terminals.

Door continuously reopens while closing:

• Photocell/light barrier may constantly detect an obstacle (misalignment, dirt, cable disconnection).
• Increased mechanical friction on the door; card detects overcurrent and reopens door.
• If limit inputs are unstable, the card may reopen, thinking the door hasn’t closed.

Door stops midway, sometimes working intermittently:

• Weak motor or mechanical jamming.
• Card output components may degrade performance when overheated.
• Unstable power supply regulation can cause resets and interruptions.

Door closes but elevator does not operate:

• Lock contact or lock reading input may have poor connection.
• Card might not generate the lock output signal.

Door slams / shows discomfort:

• Speed-torque settings may be faulty.
• Mechanical adjustments may be off (felt like a card fault).

In these cases, mechanical and sensor aspects must be evaluated alongside the card; otherwise, fault recurrence increases.

Why Should You Choose Poyraz Endüstriyel for Mekisan Door Card Repair?

The key in door card service is to avoid repeated callouts for the same fault. At Poyraz Endüstriyel, besides electronic repair of Mekisan door cards, we also aim to reduce “field conditions that exacerbate faults.”

Approach that sets us apart:

• Card vs Field Diagnosis: We distinguish photocell/limit/lock contact faults from card faults.
• Functional Testing: We do not approve repairs without verifying open-close cycles, obstacle simulation, and lock logic.
• Correct Component Standards: Selecting the right class for motor drive components and power supply circuitry reduces return risks.
• Field Inspection Notes: We provide clear instructions on rail-guide cleaning, mechanical friction, sensor alignment, and cable-terminal tightness.

This approach prevents maintenance teams from wasting time in the field and makes operations more stable.

Supported Models

AT18
AT40

The AT18 and AT40 models are used with different door mechanisms and adjustment needs in the field. Providing label/revision information on the card and a brief record of fault behavior (including LED/error indicator photos if available) speeds up the service process.

Frequently checked points on these models:

• Signs of heating/damage on motor drive outputs
• Power supply regulation stability (in cases of resets and instability complaints)
• Stable reading of photocell/limit/lock inputs
• Signs of heating/loosening on connectors and terminals
• Causes triggering protection elements on the card

In Which Situations Should a Mekisan Door Card be Repaired?

Even a slight malfunction in the door card behavior can quickly cause the elevator to go out of service. Therefore, repair/service evaluation should be done in the following cases:

• Door does not open or does not close at all
• Door reopens while closing with no obstacle detected in the field
• Door stops midway or behaves inconsistently on each cycle
• Door closes but locking condition does not establish, elevator does not move
• Card resets or LED/error indicator behavior is unstable
• Burning smell, heat marks, or connector heating on the card

Early intervention can prevent more extensive damage to motor drive components and the power supply circuit.

Mekisan Door Card Repair Process

At Poyraz Endüstriyel, Mekisan door card repair proceeds with electronic repair plus functional testing:

• Device acceptance: Model (AT18/AT40), fault description, LED/error details if available.
• Preliminary analysis: Visual inspection, power supply check, connector/terminal assessment.
• Input-output tests: Verifying stable reading of photocell, limit, and lock inputs.
• Repair: Power supply circuit, motor drive components, driver circuit, PCB/connector repairs.
• Functional testing: Open-close cycle, obstacle simulation, limit/lock logic.
• Field inspection notes: Mechanical friction, rail-guide cleaning, sensor alignment, cable-terminal tightness.

This process aims for stable door operation in the field.

How to Identify a Mekisan Door Card Fault?

Accurate observation is half the diagnosis in door card faults. The following clues help differentiate the issue in the field:

• If the door doesn’t move but the motor sounds strained, mechanical jamming is more likely.
• If the door reopens while closing, the photocell/light barrier or safety edge input may be triggered.
• If the door closes but the elevator does not run, suspect the lock contact or lock signal side.
• If there is an LED/error indicator on the card, take photos before any resets.
• If the fault worsens during the day with heating, it may indicate power supply stability issues or thermal problems in card output components.

These records quickly narrow down whether the fault originates from the card or field equipment.

Why is the Mekisan Door Card Important?

The door card plays a key role in safe elevator operation. The elevator must not move unless the door is locked; this condition is ensured by the door card and lock mechanism. If the door card is faulty, the entire elevator system can become inoperative.

In terms of comfort, proper acceleration and deceleration of the door, and vibration-free closing improve passenger experience and extend the mechanical components’ lifespan. If the door slams shut every time, the motor and mechanical parts wear out faster. The door card manages this impact.

What to Pay Attention to if the Mekisan Door Card Breaks Down

Forcing the door during a door card fault can worsen the issue. If mechanical jamming exists, the motor experiences more strain, potentially damaging the card’s motor drive components.

Important precautions:

• Do not repeatedly attempt to force the door without checking mechanical friction.
• If there is an LED/error indicator, take photos before resetting the card.
• Check the cleanliness and alignment of the photocell/light barrier.
• Inspect cable-terminal looseness and connector heating.
• Review rail-guide cleaning and door adjustments.
• If power supply fluctuates, check the power source.

These steps speed up diagnosis and prevent larger damage.

Mekisan Door Card Repair Prices

Mekisan door card repair prices vary depending on the scope of the fault on the card, damage extent, and required test duration. Complaints like “door reopens” sometimes originate not from the card but from the photocell/limit/lock lines; in these cases, field corrections offer a more accurate cost than card repair. Component-based repairs on the card are necessary for motor drive component faults or power supply regulation issues.

Factors influencing price:

• Whether the fault is on the power supply/regulation side or the motor drive output side
• Presence of burn/carbonization damage on PCB
• Effect of connector/terminal overheating on the card
• Scope of functional testing (obstacle scenario, limit/lock verification)
• Necessary control/directives to reduce repeat fault risk due to field conditions

For an accurate preliminary evaluation, the card label, a short video of fault behavior, and LED/error indicator photos are very helpful. With this information, we can classify the fault and provide a precise price offer.