31 · FC 301/302 · ALARM
For 31 · FC 301/302 · ALARM, brand is Danfoss; model / series is FC 301/302; fault code is 31; fault name is Motor phase V missing; type is ALARM, verified against its source on 2026-09-01.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 31 verified
- Fault name
- Motor phase V missing verified
- Type
- ALARM verified
- Cause
- Motor phase V between the frequency converter and the motor is missing. WARNING HIGH VOLTAGE Frequency converters contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to use qualified personnel to install, start up, and maintain the frequency converter can result in death or serious injury. • Disconnect power before proceeding. verified
- Corrective action
- • Remove the power from the frequency converter and check motor phase V. verified
What the source says
ALARM 31, Motor phase V missing
— 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
Motor phase V between the frequency converter and the motor is missing. WARNING HIGH VOLTAGE Frequency converters contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to use qualified personnel to install, start up, and maintain the frequency converter can result in death or serious injury. • Disconnect power before proceeding.
Corrective action
• Remove the power from the frequency converter and check motor phase V.
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf