Power unit: Internal fan faulty

What does A30049 mean?

The internal cooling fan within the power unit has failed. This is a critical alarm as the fan is essential for dissipating heat. Continued operation without a functional fan will rapidly lead to overtemperature faults and potentially irreversible damage to the power unit's electronics.

• Mechanical failure of the fan motor (e.g., seized bearings, broken windings, excessive noise or vibration) preventing rotation.
• Electrical failure of the fan's internal power supply or control circuit within the power unit.
• A foreign object or debris obstructing the fan blades, preventing free rotation.
• Loose or damaged electrical connection to the internal cooling fan on the power unit's PCB.
• Failure of the fan speed feedback sensor or monitoring circuit, falsely indicating a faulty fan.

Click steps to track your progress.

1. 1

   Power off the drive and lock out. Visually inspect the internal cooling fan for any physical damage, obstructions, or complete stoppage.

2. 2

   Gently attempt to rotate the fan blades manually (with power off) to check for binding, resistance, or seized bearings.

3. 3

   Check the fan's electrical connector on the power unit's circuit board for secure seating and continuity.

4. 4

   Listen for any fan rotation noise immediately after power-up; a complete lack of sound confirms fan failure.

5. 5

   Replace the faulty internal cooling fan with an original manufacturer's replacement part, ensuring correct model and proper installation.

6. 6

   After replacement, clear any pending fan faults (e.g., using P0254 = 1) and monitor internal temperatures (r0035, r0036) during operation.