F502 DC bud undervoltage

[cryomick]

I am using a Kollmorgen AKD drive (model: AKD-P00306-NAAN-0000) and it keeps showing a DC bus undervoltage error (sometimes after a very quick F302 motor overheat error, even when the motor does not run). I have checked the power supply to the drive from the internal converter and it is 24VDC like it should be.

Any suggestions as to what I could do?

i have attached a few images below to help.

[Highland_Controls]

DC Bus refers to the DC section of the drive after rectification of the AC input.  Usually means your AC input is absent or low.  What is your input voltage?

[cryomick]

The AC input is from a normal UK wall socket (240V 50Hz). But if the issue is with the input voltage, how can the voltage after rectification be 24VDC (as indicated by the power supply) ?

[Highland_Controls]

I am not sure where you are reading the 24DVC.  That is logic voltage, not bus voltage.  Bus voltage should be about 340VDC.  What power supply are you talking about?

[cryomick]

I meant the DC converter the motor drive gets the power from. it is rated for an output of 24VDC. I might not be reading the bus voltage then. I haven't worked with such drives before. Do you have any idea what else could be causing the drive to think it's not getting enough voltage?

[Highland_Controls]

Please look at the manual and make the power connections accordingly.