Drives Service & Support > PowerFlex 70 > Fault Finder

Fault Number : 3

Fault Display : Power Loss

Fault Name : Power Loss

Fault Type : 1 - Auto-Reset Run & 3 - User Configurable

Fault Description : DC bus voltage remained below 85% of nominal voltage for longer than [Power Loss Time].

Corrective Action : This fault can be enabled / disabled by using [Fault Config 1] parameter.

Check fault config 1 parameter 238, bit 0 would be set to a 1, at factory default it is a 0. Turned off by default. If it is on, then the bus voltage fell below than 85% of nominal for longer than the time set in parameter 185 Power Loss time.

Check incoming AC line for proper voltage. If the line is ok, then it may have been an isolated brownout or power sag in your utility line. If it happens repeatedly, monitor the AC line with test equipment like a Dranetz line monitor to identify when the utility line drops.