78 · FC 301/302 · ALARM
For 78 · FC 301/302 · ALARM, brand is Danfoss; model / series is FC 301/302; fault code is 78; fault name is Tracking error; type is ALARM, verified against its source on 2026-09-01.
- Brand
- Danfoss
- Model / series
- FC 301/302
- Fault code
- 78 verified
- Fault name
- Tracking error verified
- Type
- ALARM verified
- Cause
- The difference between setpoint value and actual value exceeds the value in parameter 4-35 Tracking Error. verified
- Corrective action
- • Disable the function or select an alarm/warning in parameter 4-34 Tracking Error Function. • Investigate the mechanics around the load and motor. Check feedback connections from motor encoder to frequency converter. • Select motor feedback function in parameter 4-30 Motor Feedback Loss Function. • Adjust the tracking error band in parameter 4-35 Tracking Error and parameter 4-37 Tracking Error Ramping. verified
What the source says
ALARM 78, Tracking error
— 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 difference between setpoint value and actual value exceeds the value in parameter 4-35 Tracking Error.
Corrective action
• Disable the function or select an alarm/warning in parameter 4-34 Tracking Error Function. • Investigate the mechanics around the load and motor. Check feedback connections from motor encoder to frequency converter. • Select motor feedback function in parameter 4-30 Motor Feedback Loss Function. • Adjust the tracking error band in parameter 4-35 Tracking Error and parameter 4-37 Tracking Error Ramping.
— all from files.danfoss.com, retrieved 2026-09-01
Source
- files.danfoss.comhttps://files.danfoss.com/download/Drives/MG33MO22.pdf