Fan supply voltage – fault

What does F20.10 mean?

The supply voltage required for the cooling fan is missing, preventing it from operating. This critical fault will lead to rapid overheating of internal components, potentially causing permanent damage to the drive if left unaddressed.

• Open circuit in the internal wiring or connector supplying power to the cooling fan.
• Failure of the auxiliary power supply converter (e.g., DC-DC converter) responsible for generating the fan voltage.
• Blown fuse in the fan power supply circuit (if an internal fuse is present).
• Loose connection at the fan's terminal block or within the drive's main control board.
• Overload or short circuit condition on the fan's power rail, causing the supply to shut down.

Click steps to track your progress.

1. 1

   Disconnect main power. Visually inspect the fan's electrical connector and internal wiring for secure connections and damage.

2. 2

   Measure the fan supply voltage directly at the fan terminals (e.g., X34) with the drive powered on and commanded to run (if safe).

3. 3

   Test for continuity on the fan power supply lines from the main board output to the fan connector.

4. 4

   Identify and test any internal fuses in the fan power circuit, replacing them if continuity is lost.

5. 5

   Access the drive's diagnostic menu (e.g., Parameter P8-01) to check for any related sub-faults concerning auxiliary power supplies.