Berksan Elevator Drive Technical Service
Berksan elevator drive technical service includes fault diagnosis of the LIFT VVVF drive, power board repair (rectifier–DC bus–IGBT/braking) and control/power supply board (SMPS, control card, gate driver, measurement–communication circuits) repair, cooling and connection inspections, necessary component replacements, and most critically, testing under the motor to safely return the drive to field operation. In elevator applications, the drive merely powering up on the screen, switching to “Ready/Run” mode, or rotating the motor unloaded is not sufficient. Many faults manifest only under cabin load, intense traffic causing heating, deceleration–braking cycles, or grid fluctuations. Therefore, Poyraz Industrial’s approach is not limited to “it worked”; the drive is not delivered without verifying stableoperation under scenarios simulating field conditions.
Common symptoms encountered in field Berksan LIFT VVVF drives include shaking/vibration at startup, fluctuation at low speed, jolting on floor approach, leveling error at stop, excessive DC bus voltage during deceleration, faults under heavy traffic, intermittent resets/screen shutdowns, communication/command errors, and tripping fuses upon power application. However, these symptoms do not always indicate an internal drive fault. Weak grounding, phase imbalance or grid voltage drops, motor cable insulation leakages, shielding–topology faults, brake resistor/circuit issues, contactor/brake coil interferences, high panel temperatures, and loose terminal connections can force the drive into protection mode causing the same symptoms. Skilled technical service correctly distinguishes between “drive failure” and “drive triggered by external conditions.”
Information that accelerates the process includes: complete device label (LIFT VVVF model/serial), displayed error code or screen message, the moment the fault occurred (startup–travel–deceleration), cabin load status, whether the fault worsens with heating, and whether parameters/connections have been altered recently. “Runs fine unloaded, trips under load” suggests power board weakness, DC bus capacitor aging, or thermal issues. “Fault during deceleration” indicates braking and DC bus discharge circuits. “Circuit breaker trips upon power-up” points to a possible short circuit on the power board and attempts should be minimized.
What is the Berksan Elevator Drive?
The Berksan elevator drive (LIFT VVVF) is an inverter drive that controls the speed and torque of the elevator motor. It rectifies the AC power from the grid into DC bus voltage and then produces controllable frequency/voltage output to the motor using switching elements such as IGBTs. This enables smooth starting, stable cruising, precise floor approach, and comfortable stopping of the elevator. A properly functioning drive increases passenger comfort, reduces mechanical wear, and lowers overall fault likelihood.
The drive works together with the elevator control panel: safety chain, brake management, contactor control, motor, and cabling infrastructure directly affect drive performance. Therefore, issues that appear as drive faults sometimes originate from field triggers. For example, a faulty brake resistor connection causes excessive DC bus voltage during deceleration, potentially forcing the drive into protection; weak grounding can cause communication disturbances due to interference.
The internal structure of drives like LIFT VVVF is generally divided into two main parts: power board (rectifier, pre-charge circuit, DC bus capacitors, IGBT outputs, braking circuit) and control–power supply board (SMPS, control card, gate driver, current/voltage measurement, IO/communication). Fault symptoms often provide clues regarding which section is affected.
How is the Berksan Elevator Drive Repaired?
Berksan LIFT VVVF drive repair begins with accurate field information collection, progresses through layered diagnosis and repair in the workshop, and concludes with motor-under testing. In elevator applications, checks such as “the device powered on” or “motor rotated unloaded” are insufficient because many faults occur under load, heat exposure, or braking cycles.
Initially, the fault code/screen message and the conditions under which the fault occurred are clarified: Was it during startup, travel, or deceleration? Does the fault worsen under load? Does it become more frequent with heating? These details shape the testing plan. Visual inspection follows: burnt marks, swollen/leaked capacitors, discolored resistors, fan failures, dust blockages, cooling and thermal contact problems, and terminal/connector overheating are checked.
On the power board, the rectifier, IGBT, pre-charge circuit, DC bus capacitors, and braking circuit are measured. Increased ESR in DC bus capacitors can cause load fluctuations, overcurrent/overvoltage protections, and intermittent faults. Weak braking circuits may manifest as overvoltage faults during deceleration. On the control–power section, SMPS outputs are evaluated for ripple and thermal stability; poor power supply can cause intermittent resets, screen shutdowns, or communication losses. Cold solder joints and socket contact issues are also closely examined in intermittent faults.
After repair, motor-under testing monitors current draw, DC bus stability, braking response, heating behavior, and protection recurrences. The delivery criterion is stable and consistent drive operation under the motor.
Berksan Elevator Drive Failures and Symptoms
Failures in Berksan LIFT VVVF drives can be classified under power board, supply–control board, and field triggers. The most common symptoms encountered in practice are as follows:
Trip of fuse/circuit breaker upon power application: High probability of short circuit in the power board (IGBT, rectifier, DC bus). Repeated power-up attempts may worsen damage.
Drive powers on but motor does not run: Possible issues in brake management, contactor activation, drive output, gate driver, motor/cabling, or command–parameter settings.
Shaking at startup / fluctuation at low speed: Could be caused by current measurement circuit drift, control loop instability, parameter corruption, supply fluctuations, or motor-side problems.
Jolting on floor approach / leveling error at stop: Related to deceleration profile, torque control, and brake synchronization; affects comfort and increases mechanical wear.
Overvoltage during deceleration (high DC bus): Associated with braking circuit, brake resistor connection/value, and DC bus capacitors; high grid voltage can also trigger.
Faults under heavy traffic: Increases likelihood of thermal issues; possible fan failure, air duct blockage, poor cooling, or leakage in the power board when heated.
Intermittent reset/screen shutdown/communication loss: Could result from unstable SMPS, cold solder joints, connector contact issues, or interference effects (grounding/shielding).
Why Choose Poyraz Industrial for Berksan Elevator Drive Repair?
Permanent solutions for Berksan LIFT VVVF drive repair are measured by the drive’s stable performance in the field under the same load and braking cycles. The main reason to prefer Poyraz Industrial is that we address repair beyond “fault clearance” to a root cause analysis + motor-under verification approach.
In power board faults, we do not just replace faulty parts; gate driver circuits, measurement feedbacks, DC bus capacitors, pre-charge circuit, and cooling performance are checked together. In supply faults, the SMPS merely “outputting” is not sufficient; ripple and thermal stability are verified. In intermittent reset/communication faults, cold solder joints and socket contact issues are carefully examined, as vibration and temperature changes exacerbate these failures.
Additionally, we provide practical guidance on field triggers affecting the drive (grounding, grid quality, shielding, brake resistor, panel temperature, loose connections). Our delivery criterion is not “having menu access” but stable and reliable operation under the motor.
Supported Models
At Poyraz Industrial, the supported model for Berksan drives is:
- LIFT VVVF: Priority is given to tests on starting–deceleration comfort, brake synchronization, DC bus stability, thermal endurance, and IO/communication stability in elevator use. Intermittent faults are checked by long-duration load testing to verify fault recurrence.
The main delivery condition for this model is stable operation verified by motor-under testing and thermal monitoring.
When Does the Berksan Elevator Drive Need Repair?
Conditions indicating the need for repair on Berksan LIFT VVVF drives include recurring errors/protections, degraded comfort, and power-up problems. Technical service is required if the drive frequently produces errors, interrupts trips, locks up, resets, or goes offline under heavy traffic. Even if the elevator appears operational, shaking at startup, jolting on approach, and leveling errors at stop may signal the drive is operating at its limit.
“Runs well unloaded, trips under load” suggests power board weakness, DC bus capacitor aging, or thermal issues. “Fault during deceleration” points to braking/DC bus discharge circuits. “Circuit breaker trips upon power-up” indicates suspected short circuit on the power board and should not be delayed.
Intermittent resets and communication drops are also significant; these faults typically become more frequent over time. Early intervention increases repair success and reduces costs.
Berksan Elevator Repair Process
The Berksan LIFT VVVF drive repair process involves data collection from the field, diagnosis and repair in the workshop, motor-under validation, and necessary field recommendations. Skipping the validation step may result in drive re-failure under similar field conditions.
Initial data includes device label, error code/message, fault occurrence moment (startup–travel–deceleration), load status, panel temperature, and recent interventions. If a fault occurs during deceleration, the braking/DC bus is inspected closely; if during startup, output board and current measurements get priority.
After visual inspection in the workshop, power board (IGBT, rectifier, pre-charge, DC bus capacitors, braking circuit) and control–power supply board (SMPS, gate driver, measurement and communication circuits) are measured. Cold solder joints and connector contacts receive special attention in intermittent faults. In final steps, motor-under tests monitor current, heating, DC bus stability, braking response, and fault recurrences; long-term cycling tests are performed if necessary.
How to Detect a Berksan Elevator Drive Failure?
The most practical way to understand a Berksan LIFT VVVF drive failure is to evaluate the fault code/alarm information along with the conditions in which the fault occurred and cabin behavior. If there is an error code, record it and take a screen photo if possible. Does the fault occur during startup, travel, or deceleration? Does it worsen under load? Does it become more frequent with heating? These questions accelerate diagnosis.
Cabin behaviors (shaking, fluctuation, jolting, leveling errors) may indicate instability in speed control; however, motor issues, brake settings, mechanical friction, grid quality, grounding/shielding problems can cause similar symptoms. Therefore, instead of making uncontrolled parameter changes while faults persist, basic field checks should be performed first.
If serious symptoms like fuse tripping or circuit breaker tripping upon power-up occur, do not keep powering the drive repeatedly. If there is a burnt smell, smoke, or abnormal heating, power must be cut and controlled diagnosis initiated. Recording the conditions under which intermittent faults occur also speeds up repair.
Why is the Berksan Elevator Drive Important?
The Berksan drive is the fundamental component determining the elevator’s motion quality (comfort) and operational continuity. It controls the motor’s speed and torque, thus the smoothness of starts, cruise stability, jitter-free approach deceleration, and stopping precision rely on the drive. Instability in the drive reduces user satisfaction, imposes extra stress on mechanical systems, and increases maintenance costs.
From a comfort perspective, complaints like shaking, jolting, and harsh stops are mostly related to speed control. Leveling errors at stop are critical for safe boarding and alighting. Regarding mechanical lifespan, the drive reduces wear on ropes, sheaves, bearings, and brake components by minimizing harsh starts and sudden stops. Proper brake synchronization ensures healthier brake mechanism function.
From a continuity perspective, drive failure can disable the elevator. Recurrent faults increase operational downtime and complaints. Therefore, stable drive operation directly affects total costs.
Precautions if the Berksan Elevator Drive Malfunctions
When the Berksan drive malfunctions, priority is safety and stopping the fault from worsening. If fuse or circuit breaker trips occur upon power application, it is not advisable to repeatedly attempt powering the drive; a short circuit on the power board is likely. If there is a burnt smell, smoke, or abnormal heat, power must be cut and the device should not be operated uncontrolled.
Quick checks inside the control panel include: fan operation, air duct clearance, drive overheating, cable lug tightness, loose terminals, discoloration/overheating signs on connections, and brake resistor connections. Loose connections may heat up under load, causing voltage drops and forcing the drive into protection.
External triggers must always be evaluated: weak grounding, phase imbalance, grid voltage fluctuations, motor cable insulation leakage, lack of shielding, brake resistor/circuit problems, contactor/brake coil interferences, and high panel temperature. If these factors are not corrected, the risk of repeated drive faults increases even after repair.
Recording the error code and the conditions under which the fault occurs (startup/deceleration, load, temperature) accelerates diagnosis. Random parameter changes during faults usually exacerbate the problem; controlled diagnosis is recommended.
Berksan Elevator Drive Repair Prices
Berksan LIFT VVVF drive repair costs vary depending on the fault layer (power supply, power board, control board), extent of damage, whether the fault is intermittent, and the duration of motor-under testing/monitoring. Therefore, providing a definite price without inspecting the device is not reliable. At Poyraz Industrial, we first classify the fault and then provide a transparent cost estimate.
Primary factors affecting the price:
- Supply (SMPS) and control faults: are often solvable at lower costs; however, ripple and thermal stability verification is essential.
- Power board faults (IGBT, rectifier, DC bus capacitors): may be more costly due to parts and labor.
- Chain damage: costs increase if the fault affects other circuits.
- Intermittent faults: longer test durations to capture the problem and ensure non-recurrence in field.
- Field triggers: if causes like brake resistor, grounding, or grid quality are not resolved, the drive may fault again, affecting total cost.
Usually, the following information suffices for more accurate pricing: model (LIFT VVVF), fault code, moment of fault occurrence (startup/deceleration), whether it increases under load, panel temperature, and whether the device has had prior interventions. With this data, we quickly classify the fault and provide a clearer repair cost.