Why does my Danfoss Control Unit have no output voltage?
If the Danfoss Control Unit shows no output voltage, first check the AC input voltage and ensure that no phases are missing. If the external fuse of the power supply module is blown, it indicates a failure within the module, and it should be sent to Danfoss for repair.
Why do Danfoss Servo Drives stop suddenly and not restart?
If the drive stops suddenly and does not restart, this may be because of no drive communication or the servo drive is in error mode. Check the fieldbus connection and the status indicators (LEDs) on the servo drive.
What to do if Danfoss Servo Drives speed drops sharply under load?
If the drive speed drops sharply under load, it may be running at the current limit or with incorrect parameters. Check the application and the parameter settings.
Why Danfoss Servo Drive does not run or starts up slowly?
If the servo drive does not run or only starts up slowly or with difficulty, it could be due to bearing wear, incorrect parameter settings, incorrect control loop parameters, or incorrect torque settings. Check the bearings and shaft, and verify the parameter settings.
What to do if Danfoss Servo Drives LEDs do not light up?
If the LEDs do not light up, the cause is likely that there is no power supply. Check the power supply.
What to do when Danfoss Control Unit shows no output voltage due to internal failure?
If your Danfoss Control Unit has no output voltage due to an internal failure, contact Danfoss-Service. If the external fuse is broken, do not attempt to restore mains voltage to the power supply module.
What causes reduced output voltage in Danfoss Control Unit due to heatsink temperature?
If the output voltage of your Danfoss Control Unit is possibly reduced and the internal heatsink temperature is too high, check that the air inlet and outlet are free from obstructions. Also, verify that the ambient temperature is not excessively high. If the temperature is above the "Warning Level", the output current will be limited to 4 A.
What to do if fan problems reduce Danfoss Control Unit output voltage?
If the output voltage of your Danfoss Control Unit is possibly reduced, it may be due to the fan being blocked or its speed being reduced. Check if the fan is mechanically locked, perhaps by parts inside the power supply. If a replacement is needed, send the power supply module to Danfoss. If the fan is blocked, the output current is automatically limited to 4 A.
What does Error 0xFF91 mean on Danfoss Servo Drives?
Error 0xFF91 indicates that increments between succeeding values are too big. Check for velocity or guide value plausibility distance.
What causes Danfoss Servo Drives to make a screaming noise?
If the drive is screaming, it may be due to incorrect calibration, a faulty current measurement, or incorrect control loop parameters. Check the parameter settings and contact Danfoss.
Explains the manual's scope and content for using the frequency converter.
Lists other documents and online resources for technical information and guidance.
Defines warning symbols used throughout the manual to indicate hazards.
Specifies requirements for personnel authorized to install, commission, and maintain the equipment.
Outlines essential safety regulations and warnings related to high voltage and unintended start.
Covers planning the installation site, inspection on receipt, and transportation.
Details preparation, tools, general considerations, terminal locations, and cooling requirements.
Covers grounding, protection, RFI switch, torque, cables, mains connection, and fuses.
Describes the Local Control Panel (LCP) layout, display lines, and functional groups.
Provides a step-by-step guide for initial setup and configuration using the Quick Menu.
Explains the Smart Application Setup (SAS) for quick commissioning of applications and fieldbusses.
Details supply voltage, frequency, imbalance, power factor, and environmental considerations.
Specifies maximum cable lengths, cross-sections, and types for motor, control, and brake connections.
Lists digital and analog input/output specifications, including voltage levels and resistance.
Categorizes warnings and alarms, explaining reset procedures and display indicators.
Provides detailed explanations of specific warning/alarm conditions, causes, and troubleshooting steps.
General| Series | VLT |
|---|---|
| Category | DC Drives |
| Output Voltage | 0-100% of input voltage |
| Protection Features | Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault |
| Communication Interfaces | Profibus, CANopen |
| Enclosure Rating | IP20, IP21, IP55, IP66 |
| Cooling Method | Forced Air Cooling, Convection Cooling |
| Control Mode | Sensorless Vector, Closed Loop Vector |
| Ambient Temperature | -10°C to +50°C (14°F to 122°F) |
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