74 · FC 301/302 · ALARM
For 74 · FC 301/302 · ALARM, brand is Danfoss; model / series is FC 301/302; fault code is 74; fault name is PTC Thermistor; type is ALARM, verified against its source on 2026-09-01.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 74 verified
- Fault name
- PTC Thermistor verified
- Type
- ALARM verified
- Cause
- Alarm related to VLT® PTC Thermistor Card MCB 112. The PTC is not working. verified
What the source says
ALARM 74, PTC Thermistor
— 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
Alarm related to VLT® PTC Thermistor Card MCB 112. The PTC is not working.
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf