What to do if motor phase W is missing in Danfoss VLT HVAC Drive FC 102?
If your Danfoss DC Drives report that motor phase W is missing, remove the power from the frequency converter and check motor phase W.
What to do if Danfoss VLT HVAC Drive FC 102 show DC Overvoltage warning?
If your Danfoss DC Drives unit displays a DC Overvoltage warning or alarm, it means the DC-link voltage has exceeded its limit, potentially causing the drive to trip. To resolve this, consider these steps: * Connect a brake resistor. * Extend the ramp time. * Change the ramp type. * Activate the functions in parameter 2-10 Brake Function. * Increase parameter 14-26 Trip Delay at Inverter Fault. If the issue arises during a power sag, explore using kinetic back-up (parameter 14-10 Mains Failure).
What to do if Danfoss VLT HVAC Drive FC 102 display Inverter Overload warning?
If your Danfoss DC Drives unit is showing an inverter overload warning or alarm, it means the drive has been running with more than 100% overload for an extended period and is at risk of shutting down. Here's what you can do: * Compare the output current displayed on the LCP with the drive's rated current. * Compare the output current on the LCP with the measured motor current. * Monitor the thermal drive load on the LCP. If running above the drive's continuous current rating, the counter increases; if running below, it decreases.
What to do if Danfoss VLT HVAC Drive FC 102 show Mains Phase Loss alarm?
If your Danfoss DC Drives unit is showing a Mains Phase Loss warning or alarm, it indicates a missing phase on the supply side or an excessive mains voltage imbalance. This message can also appear due to a fault in the input rectifier. To address this, check the supply voltage and supply currents to the drive.
How to deactivate Safe Stop on Danfoss VLT HVAC Drive FC 102 DC Drives?
If the Safe Stop is activated on your Danfoss DC Drives, it means that Safe Torque Off (STO) has been engaged. To resume normal operation, apply 24 V DC to terminal 37, and then send a reset signal via bus, digital input, or by pressing the Reset button.
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.
Why Danfoss VLT HVAC Drive FC 102 shows Option Module Configuration has Changed alarm?
If your Danfoss DC Drives displays an alarm indicating that the Option Module Configuration has changed, it means that options have been added or removed since the last power-down. To resolve this, verify that the configuration change was intentional, and then reset the unit.
How to fix Heat Sink Temperature Low warning on Danfoss VLT HVAC Drive FC 102?
If your Danfoss DC Drives unit shows a Heat Sink Temperature Low warning, it means the drive is too cold to operate, based on the temperature sensor in the IGBT module. To resolve this, increase the ambient temperature of the unit. Alternatively, supply a trickle amount of current to the drive whenever the motor is stopped by setting parameter 2-00 DC Hold/Preheat Current to 5% and parameter 1-80 Function at Stop.
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.
What to do if Danfoss VLT HVAC Drive FC 102 DC Drives displays 10 Volts Low warning?
If your Danfoss DC Drives unit displays a '10 Volts Low' warning, it means the control card voltage from terminal 50 is less than 10 V. To troubleshoot, first remove the wiring from terminal 50. If the warning clears, the issue lies with the wiring. If the warning persists, replace the control card.
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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