A1128 / F1129 fault in WEG CFW900 Drive

A1128 / F1129 Slot A sensor 1 high temp / overtemperature fault in WEG CFW900 Drive

These codes indicate a Slot A Sensor 1 High Temperature. This means the monitored external equipment has exceeded its safe thermal limits.
Cause:

  • The monitored equipment is operating at high temperature.
  • Fault actuation level configuration error.

Remedy:

Verify equipment active operating temperature levels. Review parameter configurations for fault actuation thresholds.