Danfoss Error 1027 ^new^

Danfoss Error 1027: The Comprehensive Guide to Diagnosis, Causes, and Repair

7. Prevention for Future

• Ensure brake resistor ohms ≥ minimum allowed (see drive manual, e.g., FC-102: 27Ω min for 380–480V units).
• Add a thermal switch (normally closed) in series with brake resistor and wire to a digital input programmed as Brake resistor thermistor (parameter 2-16).
• Set parameter 2-13 Brake Power Monitoring = [1] Warning or [2] Trip.
• Use shielded, short cables between drive and brake resistor (max 5 m / 16 ft unless using output filters).

Your Next Steps

| Situation | Action | |-----------|--------| | Drive is under warranty | Contact Danfoss or your distributor for a replacement. | | Out of warranty, small drive (<7.5 kW) | Replace the drive (repair cost often exceeds new price). | | Out of warranty, large drive (>7.5 kW) | Contact a Danfoss authorized service center for an evaluation. |

5. Check Parameter Consistency (Advanced)

Unlikely to cause 1027, but a corrupted parameter set can mimic internal faults. Try: danfoss error 1027

• Parameter 14-22 (Operation Mode) – set to Normal operation.
• Parameter 14-50 (RFI Filter) – set to On (unless on an IT mains).
• Perform a parameter reset (P14-22 = 2 "Initialization"). Warning: This wipes all settings – back them up first.