What causes 24 V Supply Low warning on Danfoss VLT HVAC Drive FC 102?
If your Danfoss DC Drives unit is showing a '24 V Supply Low' warning, it indicates that the supply on the power card is out of range. To fix this, check for a defective power card.
How to fix brake resistor short circuit in Danfoss VLT HVAC Drive FC 102?
If your Danfoss DC Drives are reporting a brake resistor short circuit, the brake resistor is being monitored during operation. Remove the power to the frequency converter and replace the brake resistor.
Why does Danfoss VLT HVAC Drive FC 102 motor run rough?
If the motor runs rough with your Danfoss DC Drives, it could be due to overmagnetization. Check the motor settings in parameter groups 1-2* Motor Data, 1-3* Addl. Motor Data, and 1-5* Load Indep. Setting.
Why is motor speed unstable in Danfoss VLT HVAC Drive FC 102 DC Drives?
If the motor speed is unstable in your Danfoss DC Drives, it might be due to incorrect parameter settings. Review the settings in parameter group 1-6* Load Depen. Setting. For closed-loop operation, check settings in parameter group 20-0* Feedback.
Why Danfoss DC Drives motor will not brake?
If the motor will not brake in your Danfoss DC Drives, review the brake parameters and ensure they are correctly configured. Also, check if the ramp-down times are too short.
What to do if Danfoss DC Drives motor is not reaching maximum speed?
If the motor is not reaching its maximum speed with your Danfoss DC Drives, check if the frequency limits are set correctly and adjust them as needed. Also, verify that the reference input signal is scaled correctly and adjust the settings accordingly.
What causes line power current imbalance greater than 3% in Danfoss DC Drives?
If you notice a line power current imbalance greater than 3% in your Danfoss DC Drives, it could be a problem with the line power supply itself. Check the line power supply. If the imbalance remains on the same input terminal, there may be a problem with the unit, and you should contact the supplier.
What causes an external fan fault on Danfoss DC Drives?
If you are experiencing an external fan fault with your Danfoss DC Drives, the fan warning function checks if the fan is running/mounted. Check for proper fan operation. Cycle power to the frequency converter and check that the fan operates briefly at start-up. Also, check the sensors on the heat sink.
What to do if Danfoss DC Drives display Live Zero Error?
The 'Live Zero Error' warning or alarm on your Danfoss DC Drives appears if programmed in parameter 6-01 Live Zero Timeout Function and the signal on one of the analog inputs is less than 50% of the minimum value programmed for that input. Check the connections on all analog mains terminals. Also, check control card terminals 53 and 54 for signals, using terminal 55 as common. Ensure that the drive programming and switch settings match the analog signal type.
What does a brake chopper fault mean on Danfoss VLT HVAC Drive FC 102?
A brake chopper fault on Danfoss DC Drives means that if a short circuit occurs, the brake function is disabled. Remove power to the frequency converter and remove the brake resistor.
General| Enclosure | IP20, IP21, IP55 |
|---|---|
| Ambient Temperature Range | -10°C to +40°C |
| Storage Temperature Range | -25°C to +70°C |
| Relative Humidity | 5-95% (non-condensing) |
| Communication Protocols | Modbus RTU, BACnet, Profibus |
| Certifications | CE, UL, cUL |
| Control Principle | PWM |
| Cooling Method | Forced air cooling |
| Input Voltage | 200-240V, 380-480V, 525-600V |
| Control Modes | sensorless vector control, closed loop vector control |
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