Aux Voltage

What does F82 mean?

This fault is triggered by a digital input fault, signaling an issue with the auxiliary voltage supply. This suggests a problem with the external auxiliary power source or its monitoring.

• Loss of the external auxiliary control voltage (e.g., 24VDC, 120VAC) used to power control circuits, external relays, or sensors.
• Failure of the auxiliary power supply (e.g., transformer, switch-mode power supply) causing its output voltage to drop or disappear.
• Overload or short circuit on the auxiliary voltage distribution circuit, tripping a protective device (e.g., circuit breaker, fuse).
• Malfunctioning voltage monitoring device (e.g., voltage relay) for the auxiliary voltage supply, incorrectly signaling a fault.
• Broken or loose control wiring between the auxiliary voltage monitoring device and the drive's digital input (e.g., DI8, COM).

Click steps to track your progress.

1. 1

   Measure the auxiliary voltage supply at its source (e.g., 24VDC power supply output) to confirm correct voltage levels.

2. 2

   Identify the specific digital input (e.g., DI8) configured for auxiliary voltage monitoring via parameters like P2-08.

3. 3

   Measure the voltage across the identified digital input terminal (e.g., DI8 to COM) to confirm the state signaled by the monitoring device.

4. 4

   Inspect any circuit breakers or fuses protecting the auxiliary voltage supply circuit for trips or blown conditions.

5. 5

   Trace the control wiring from the auxiliary voltage monitoring device to the drive's digital input for breaks, shorts, or loose connections.