166 · FC 301/302 · ALARM
For 166, model / series is FC 301/302; type is ALARM; brand is Danfoss; fault name is ATEX ETR freq.lim.alarm; cause is The frequency converter has operated for more than 60 s (in a period of 600 s) below the allowed minimum frequency (parameter 1-98 ATEX ETR interpol. points freq.), verified against its source on 2026-10-10.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 166 verified
- Fault name
- ATEX ETR freq.lim.alarm verified
- Type
- ALARM verified
- Cause
- The frequency converter has operated for more than 60 s (in a period of 600 s) below the allowed minimum frequency (parameter 1-98 ATEX ETR interpol. points freq.). verified
What the source says
ALARM 166, ATEX ETR freq.lim.alarm
— 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 has operated for more than 60 s (in a period of 600 s) below the allowed minimum frequency (parameter 1-98 ATEX ETR interpol. points freq.).
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf