How to troubleshoot a short circuit alarm on Danfoss DC Drives?
There is short-circuiting in the motor or motor wiring. Remove power to the adjustable frequency drive and repair the short circuit.
What to do if motor phase U is missing in Danfoss vlt FC 102?
Motor phase U between the adjustable frequency drive and the motor is missing. Remove power from the adjustable frequency drive and check motor phase U.
How to fix an earth (ground) fault alarm on Danfoss vlt FC 102 DC Drives?
There is current from the output phases to ground, either in the cable between the adjustable frequency drive and the motor, or in the motor itself. Remove power to the adjustable frequency drive and repair the ground fault.
What causes an inverter overload warning/alarm on my Danfoss DC Drives?
The frequency converter has been running with more than 100% overload for too long. Compare the output current shown on the LCP with the frequency converter rated current.
What causes a brake resistor short circuit warning on Danfoss DC Drives and how to fix it?
If a short circuit occurs, the brake function is disabled, and the warning appears. Remove power to the adjustable frequency drive and replace the brake resistor.
Why am I getting a motor overload temperature warning/alarm on my Danfoss vlt FC 102 DC Drives?
The fault occurs when the motor runs with more than 100% overload for an extended period. Check for motor overheating.
Why does my Danfoss vlt FC 102 show a mains phase loss warning/alarm?
A phase might be missing on the supply side, or the line voltage imbalance could be too high. This message can also indicate a fault in the input rectifier on the adjustable frequency drive. Check the fuses to the frequency converter and the mains supply to the unit.
General| Category | DC Drives |
|---|---|
| Model | Danfoss VLT FC 102 |
| Output voltage range | 0 to rated motor voltage |
| Power range | 0.37 kW to 200 kW |
| Communication interfaces | RS-485 |
| Protection features | Overvoltage, undervoltage, overcurrent, short circuit, earth fault, overtemperature, motor thermal protection |
| Cooling method | Air-cooled |
| Enclosure rating | IP20, IP21, IP55 (depending on model) |
| Approvals | CE, UL, cUL |
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