Error description 237-18557

Error message

18557 UM (FS.B): UM-FS.A improper power supply CC%2 %1

Cause of error

- An internal supply voltage is too high or too low

Error correction

- Note any further messages from the inverter
- Check the supply voltage of the inverter (jumper plug X76)
- Reboot the control
- Inform your service agency
- Exchange the inverter, if necessary