text: <s>[INST] PowerFlex 753 suddenly reboot Summary: Drive reboot and power-up again while tying to start Hello. Could some one to help? Have a new one PF 753 400V 30kW, 60Amps. After all necessary parameters tuned (Induction SV mode, motor NP data) I had tried to pass through start-up procedures with 18,5kW 50Hz, 380V motor connected, but on detect rotation step, after command to start drive (from HIM), right away, I got reboot PF and power-up, witout any alarms and faults. After that I got this always, even if no motor connected to drive's terminals, while trying to start drive: just reboot and power-up again and again. I had tried to change conrol mode to VHz, performed reset to defauls, upgrade fimvare from 7.001 to 9.001, but still no luck. Any ideas? Thank you. Victor [/INST] It sounds like you have already tried to run the motor without going through the start-up wizard and the drive still does this reboot process. It reboots whenever you attempt to put power out to the motor, if I understand what you're telling us. I think this is a problem for which you will have to contact Rockwell Tech Support. I could not find a description of this behavior in the knowledgebase, so unless someone here has experienced it, your best bet is Tech Support. You should also contact your local Rockwell distributor for assistance. This is the sort of problem which both they and Tech Support should be happy to assist for a new out-of-the-box drive. \\n </s>