9 · FC 301/302 · WARNING/ALARM
For 9 · FC 301/302 · WARNING/ALARM, brand is Danfoss; model / series is FC 301/302; fault code is 9; fault name is Inverter overload; type is WARNING/ALARM, verified against its source on 2026-09-01.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 9 verified
- Fault name
- Inverter overload verified
- Type
- WARNING/ALARM verified
- Cause
- The frequency converter has run with more than 100% overload for too long and is about to cut out. The counter for electronic thermal inverter protection issues a warning at 98% and trips at 100% with an alarm. The frequency converter cannot be reset until the counter is below 90%. verified
- Corrective action
- • Compare the output current shown on the LCP with the frequency converter rated current. • Compare the output current shown on the LCP with the measured motor current. • Show the thermal frequency converter load on the LCP and monitor the value. When running above the frequency converter continuous current rating, the counter increases. When running below the frequency converter continuous current rating, the counter decreases. verified
What the source says
WARNING/ALARM 9, Inverter overload
— files.danfoss.com, retrieved 2026-09-01
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Cause
The frequency converter has run with more than 100% overload for too long and is about to cut out. The counter for electronic thermal inverter protection issues a warning at 98% and trips at 100% with an alarm. The frequency converter cannot be reset until the counter is below 90%.
Corrective action
• Compare the output current shown on the LCP with the frequency converter rated current. • Compare the output current shown on the LCP with the measured motor current. • Show the thermal frequency converter load on the LCP and monitor the value. When running above the frequency converter continuous current rating, the counter increases. When running below the frequency converter continuous current rating, the counter decreases.
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf