Background / Cause:

This fault occurs when the motor cannot rotate despite receiving power, indicating the controller has detected no movement feedback. Common causes include mechanical jamming, excessive load, brake failure to release, or motor winding damage.

Solutions:

1.Check for mechanical obstruction or bindingInspect the door track, rollers, and curtain for debris, misalignment, or physical jamming. Ensure the door moves smoothly when operated manually.

2.Verify brake release operationRun the motor in Jog mode and listen for the brake release click. If the brake does not release, follow the ERR05 troubleshooting steps to resolve brake issues.

3.Reduce load and check door balanceConfirm the door weight is within the motor’s rated capacity. Check counterbalance springs or weights to ensure they are properly adjusted.

4.Inspect motor wiring and windingCheck the motor power cable for damage or loose connections. Measure the three-phase winding resistance; unbalanced values indicate a damaged motor.

5.Adjust speed and acceleration parametersIf the fault occurs during start-up, reduce the initial speed or increase the acceleration time in the controller settings.

Notes:

• Repeated operation under stall conditions can cause permanent motor overheating and damage.

• Always resolve mechanical issues before attempting to reset the fault or adjust parameters.

Background / Cause:

This fault occurs when the controller detects the DC bus voltage exceeds the safety threshold. Common causes include unstable/over-high input voltage, grid interference from high-power equipment, or a faulty controller voltage detection circuit.

Solutions:

1.Check the input power supplyMeasure the AC input voltage to confirm it is within the rated range of the controller. Fluctuations above 10% of the rated voltage will trigger this fault.

2.Reduce grid interferenceIf high-power equipment (such as welding machines or large motors) is sharing the same power circuit, move the door motor to an independent circuit or install a line filter to eliminate interference.

3.Verify the controller hardwareIf the input voltage is normal, the fault may be caused by a damaged voltage detection circuit inside the controller. Swap with a known working unit to test.

4.Check regenerative voltage (for high-speed doors)For fast-closing doors, check if the motor generates excessive regenerative voltage during deceleration. If so, adjust the deceleration parameters or add a braking resistor.

Notes:

• Do not repeatedly reset the fault without resolving the root cause, as sustained overvoltage can permanently damage the controller’s power components.

• Always confirm the power supply is stable before powering the system back on.