What Are the Common Fault Phenomena of Elevator Modules?
In modern elevator control systems, elevator modules are one of the core components of the drive system. Common modules include IGBT modules, drive modules, power modules, and inverter modules. They are responsible for speed control, drive output, and energy conversion. Once a module fails, it will directly affect the stability and safety of elevator operation.
As a professional A-FLY elevator & escalator parts supplier, we have summarized several common fault phenomena of elevator modules to help you quickly determine whether the elevator needs inspection or module replacement.
1. The elevator suddenly stops or frequently “freezes”
If the elevator suddenly stops without warning during operation, or repeatedly freezes during startup, this is usually related to unstable output from the module. Possible reasons include: IGBT damage, aging power transistors, internal circuit soldering issues, or drive board failure. This phenomenon requires immediate inspection; otherwise, it may lead to more serious electrical failures.
2. Difficulty starting or noticeable elevator vibration
If the elevator starts slowly, lacks power during startup, or shows significant vibration when starting, it is mostly caused by unbalanced current output from the drive module. When the module cannot provide stable drive current, the motor fails to run smoothly, causing vibration or startup failure. This issue is very common in elevators that undergo old-building modernization or long-term high-frequency operation.
3. Frequent inverter errors or tripping
Many elevator inverters will display errors such as:
Overcurrent (OC)
Overvoltage (OV)
Undervoltage (UV)
IGBT Fault (module failure)
These alarms often indicate damaged internal components, poor heat dissipation, or abnormal control signals in the module. If not handled in time, it may damage the motor or cause the entire drive system to shut down.
4. Excessive module temperature or abnormal heat dissipation
High temperature is one of the biggest risks for module failure.
Overheating may lead to:
Thermal protection during elevator operation
Unexpected shutdown
Module burnout
Motor performance degradation
Common causes include: faulty fans, dusty heat sinks, or aging thermal sensors.
Once a temperature anomaly is detected, the heat dissipation system and module must be inspected immediately.
5. Abnormal elevator speed or failure to adjust speed
If the elevator shows:
Speed fluctuations
Uneven acceleration and deceleration
Abnormal deceleration before leveling
These issues are often caused by the failure of the speed control module, or distorted IGBT trigger signals.This is a major safety hazard affecting riding comfort and must be checked with priority.
6. Abnormal noise or unstable current during elevator operation
When module failure causes abnormal motor drive signals, it may result in:
A buzzing electrical noise during operation
Sharp whistling from the drive cabinet
Large current fluctuations
These symptoms often indicate that the module is in a semi-failure state and may stop working completely at any time.
A-FLY — Professional One-Stop Supplier of Elevator Modules and Components
As an industry-leading elevator parts supplier, A-FLY can provide multi-brand and multi-model module products, including:
Elevator Drive Modules
Elevator Inverter / VVVF Modules
Rectifiers, drive boards, power boards
Full ranges of elevator control components (elevator buttons, main boards, elevator light curtains, elevator door operators, etc.)
All modules are strictly tested and compatible with major mainstream brands.
Whether for old-elevator maintenance, fault replacement, or modernization projects, A-FLY can provide high-quality, stable, and reliable module components.
Summary: The module may be small, but it affects the safety of the entire elevator
Once an elevator module fails, it can create significant risks. Therefore, timely identification and replacement are key to ensuring safe elevator operation.
Choose A-FLY to make your elevator operate more stably, safely, and reliably.
