What does L1-T1/L2-T2/L3-T3 shorted mean on a Danfoss VLT MCD 600?
If the Danfoss Controller detects L1-T1, L2-T2, or L3-T3 Shorted, it means that during pre-start checks, the soft starter has detected a short-circuited SCR or a short circuit within the bypass contactor. Consider using PowerThrough to allow operation until the soft starter can be repaired. Also, see parameter 6-19 Shorted SCR Action.
What causes heat sink overtemperature on a Danfoss VLT MCD 600 Controller?
If the Danfoss Controller displays a heat sink overtemperature warning, check the following: - Ensure bypass contactors are operating. - Verify cooling fans are functioning (MCD6-0064B~MCD6-0579B and MCD6-0042B~MCD6-0579B models). - If in an enclosure, ensure adequate ventilation. - Mount the VLT® Soft Starter MCD 600 vertically. - Verify internal bypass contactors are operating using run simulation to measure resistance across each controlled phase (resistance should be >0.2 MΩ when open and
What to do for overvoltage error on Danfoss VLT MCD 600 Controller?
If the Danfoss Controller displays an overvoltage error, it indicates a voltage surge on the mains, possibly due to problems with a transformer tap regulator or off-loading of a large transformer load. Check the following parameters: - Parameter 5-9 Overvoltage. - Parameter 5-10 Overvoltage Delay. - Parameter 6-7 Overvoltage.
What causes current imbalance in Danfoss VLT MCD 600 Controller?
If the Danfoss Controller shows a current imbalance, it could be due to an imbalance in the incoming mains voltage, a problem with the motor windings, a light load on the motor, a phase loss on mains terminals L1, L2, or L3 during Run mode, or a failed SCR. Check the following parameters: - Parameter 5-1 Current Imbalance. - Parameter 5-2 Current Imbalance Delay. - Parameter 6-3 Current Imbalance.
What causes undercurrent on a Danfoss VLT MCD 600?
If the Danfoss Controller displays an undercurrent, the motor has experienced a sharp drop in current, caused by loss of load. This can be due to broken components (shafts, belts, or couplings) or a pump running dry. Check the following parameters: - Parameter 5-3 Undercurrent. - Parameter 5-4 Undercurrent Delay. - Parameter 6-4 Undercurrent.
What does underpower mean on Danfoss VLT MCD 600 Controller?
If the Danfoss Controller displays an underpower error, it means the motor has experienced a sharp drop in power, caused by loss of load. This can be due to broken components (shafts, belts, or couplings), or a pump running dry. Check the following parameters: - Parameter 5-11 Underpower. - Parameter 5-12 Underpower delay. - Parameter 6-8 Underpower.
What to do if Danfoss Controller detects low control volts?
If the Danfoss Controller detects low control volts, it means the soft starter has detected a drop in the internal control voltage. This protection is not active in ready state. Check the external control supply (terminals A7, A8, A9) and reset the soft starter. If the external control supply is stable, check if the 24 V supply on the main control PCB is faulty, or check if the bypass driver PCB is faulty. Contact the local supplier for advice.
How to troubleshoot motor connection T1/T2/T3 error on Danfoss Controller?
If the Danfoss Controller displays a 'Motor Connection T1/T2/T3' error, it means the motor is not connected correctly to the soft starter. Check individual motor connections to the soft starter for power circuit continuity and check connections at the motor terminal box. If the soft starter is connected to a grounded delta mains supply, adjust parameter 20-6 Motor Connection to match the motor connection configuration.
General| Brand | Danfoss |
|---|---|
| Model | VLT MCD 600 |
| Category | Controller |
| Language | English |
To Next Page
