77 · FC 301/302 · WARNING
For 77 · FC 301/302 · WARNING, brand is Danfoss; model / series is FC 301/302; fault code is 77; fault name is Reduced power mode; type is WARNING, verified against its source on 2026-09-01.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 77 verified
- Fault name
- Reduced power mode verified
- Type
- WARNING verified
- Cause
- The frequency converter is operating in reduced power mode (less than the allowed number of inverter sections). This warning is generated on power cycle when the frequency converter is set to run with fewer inverters and remains on. verified
What the source says
WARNING 77, Reduced power mode
— files.danfoss.com, retrieved 2026-09-01
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
Cause
The frequency converter is operating in reduced power mode (less than the allowed number of inverter sections). This warning is generated on power cycle when the frequency converter is set to run with fewer inverters and remains on.
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf