Why Danfoss PTU 025 DC Drives 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 PTU 025 DC Drives?
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 to do if Danfoss 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.
What causes 24 V Supply Low warning on Danfoss PTU 025?
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.
General| Supply voltage | 24 VDC |
|---|---|
| Rated current | 25 A |
| Output voltage | 0-24 VDC |
| Protection class | IP20 |
| Control signal | 0-10 V, 4-20 mA |
| Protection | overtemperature |
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