Applicable Systems
DR-PRO 50t
Symptoms
The crane reports a VFD overcurrent fault. The variable frequency drive has tripped on overcurrent.
Possible Causes
- Motor or cable short circuit
- Sudden load increase or mechanical jam
- VFD parameter settings incorrect
Troubleshooting Steps
- Step 1: Check for short circuits in the motor and cable
No shorts detected - Step 2: Inspect the driven mechanism for jams
Mechanism moves freely - Step 3: Verify VFD parameters match the motor
Parameters are correctly configured
How to Reset
To reset: Resolve the overcurrent cause, then reset the VFD.
Source: Demag DR Rope Hoist Manual, Demag Cranes & Components GmbH
Category: Crane