DRIVER SHORTED

What does 1074 mean?

The motor controller (codes 1074, 2074, 3074) has detected a short circuit in a driver output stage. This typically indicates a fault in the power output section controlling a motor phase or internal component. The specific lift reaction is controller dependent.

• Short circuit on motor phase wiring (e.g., phase-to-phase, phase-to-ground).
• Motor winding insulation breakdown.
• Internal fault in the controller's power transistors (e.g., IGBT/MOSFETs).

Click steps to track your progress.

1. 1

   Inspect motor power cables for visible damage, chafing, or insulation breakdown from the controller to the motor.

2. 2

   Verify secure connections of motor power cables at both the motor controller output terminals and the motor terminal block.

3. 3

   Measure the insulation resistance of each motor phase winding to ground and between phases using an insulation tester.

4. 4

   Measure the resistance of each motor phase winding (U-V, V-W, W-U) with a multimeter and compare values for consistency.