Danfoss Error 1027 !full! Guide

Danfoss Error 1027: Causes, Symptoms, and Troubleshooting Guide

Emergency reference: If the drive is critical to your process and you have a spare control card of the same revision, you can attempt a swap – but 1027 often involves the main power board, not just the card. danfoss error 1027

that prevents the drive from starting or operating correctly Fault Description Error Type : Internal Error / System Fault. Common Trigger You have confirmed a shorted IGBT (diode test)

: Disconnect the mains supply completely and wait for the display to turn off (allow at least 5–15 minutes for DC link capacitors to discharge) before reconnecting power. Verify Input Voltage Elias wiped the grease from his hands and

: Ensure all option cards and internal wiring connections are secure. Øwre-Johnsen Advanced Recovery: Manual Initialization

8. When to Call Danfoss Service

• You have confirmed a shorted IGBT (diode test) but lack repair tools.
• Drive is under warranty (Error 1027 on new unit → manufacturing defect).
• Multiple drives on same DC bus show same fault (possible upstream power issue).

Elias wiped the grease from his hands and stepped toward the glowing keypad of the Danfoss FC 102

Restart: Power the drive back on without the motor connected. Try to clear the fault by pressing the Reset key. If the fault persists without the motor, the problem is internal to the drive. 2. Check Internal Connections