What to do if the Danfoss VLT MCD 600 Controller shows an instant overcurrent error?
If the Danfoss Controller displays an instant overcurrent error, it means the current on all three phases has exceeded 7.2 times the value set for the motor's full load current. This could be due to a locked rotor or an electrical fault in the motor or cabling. Check for jammed loads and inspect the motor and cables for faults.
How to resolve a motor overload error on a Danfoss VLT MCD 600 Controller?
If the motor has reached its maximum thermal capacity, the Danfoss Controller will show a motor overload. This can happen if the controller's protection settings don't match the motor's thermal capacity. Resolve the cause of the overload, allow the motor to cool down, and then check the following parameters: - Parameter 1-2 Motor Full Load Current. - Parameter 1-4 Locked Rotor Time. - Parameter 1-5 Locked Rotor Current. - Parameter 1-6 Motor Service Factor. - Parameter 5-15 Excess Start Time. - Parameter 6-10 Excess Start Time.
What causes L1/L2/L3 phase loss in Danfoss Controller?
If the Danfoss Controller detects a phase loss on L1, L2, or L3, it means that during pre-start checks, a phase loss was detected. In run state, it indicates that the current on the affected phase has dropped below 10% of the programmed motor FLC for more than 1 second, suggesting a loss of the incoming phase or a disconnection to the motor. Check the supply, input, and output connections for both the soft starter and the motor.
What does overcurrent mean on a Danfoss VLT MCD 600?
If the Danfoss Controller shows an overcurrent, it means the current has exceeded the level set in parameter 5-5 for longer than the time set in parameter 5-6. This can be due to a momentary overload. Check the following parameters: - Parameter 5-5 Overcurrent. - Parameter 5-6 Overcurrent Delay. - Parameter 6-5 Overcurrent.
Why does my Danfoss VLT MCD 600 Controller show a frequency error?
If the Danfoss Controller shows a frequency error, the mains frequency is outside the specified range. This issue is not adjustable. Check for other equipment that could be affecting the mains supply, especially drives and switch mode power supplies. If the soft starter is connected to a generator set supply, the generator may be too small or have a speed control problem. Check parameter 6-15 Frequency.
How to fix phase sequence error on Danfoss VLT MCD 600 Controller?
If the Danfoss Controller displays a phase sequence error, it means the phase sequence on the soft starter mains terminals (L1, L2, L3) is not valid. Check the phase sequence on L1, L2, and L3, and ensure that the setting in parameter 5-18 Phase Sequence is suitable for the installation.
What causes undervoltage on a Danfoss VLT MCD 600?
If the Danfoss Controller is showing an undervoltage error, it means the mains voltage has dropped below the selected level. This can be caused by an undersized supply or adding a large load to the system. No solution was provided.
What does motor thermistor error mean on Danfoss VLT MCD 600 Controller?
If the Danfoss Controller displays a motor thermistor error, it means the motor thermistor input has been enabled and the resistance at the thermistor input has exceeded 3.6 kΩ for more than 1 second, or the motor winding has overheated. Identify the cause of the overheating and allow the motor to cool before restarting. Use the thermistor reset function to disable the thermistor. Check parameter 6-17 Motor Overtemperature.
What to do if Danfoss VLT MCD 600 Controller shows a power loss error?
If the Danfoss Controller displays a power loss error, it means the soft starter is not receiving mains supply on one or more phases. Check that the main contactor closes when a start command is given and remains closed until the end of a soft stop. Also, check the fuses. If testing the soft starter with a small motor, it must draw at least 10% of the programmed FLC setting on each phase.
Why is my Danfoss Controller not ready?
If the Danfoss Controller is not ready, the reset input may be active, preventing operation, or the soft starter may be waiting for the restart delay to elapse. Check the following parameters: - Parameter 5-16 Restart Delay. - Parameter 7-9 Reset/Enable Logic.
General| Brand | Danfoss |
|---|---|
| Model | VLT MCD 600 |
| Category | Controller |
| Language | English |
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