Control Power Supply Undervoltage

Was bedeutet Uv2 ?

The drive detected an undervoltage condition specifically in the control power supply circuit. This affects the internal logic and control functions of the drive.

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1. 1

   Measure the main input voltage (L1-L2, L2-L3, L3-L1) at the drive's R/L1, S/L2, T/L3 terminals and verify against the nominal supply voltage.

2. 2

   Inspect all main power input wiring connections at the drive terminals and upstream power distribution for looseness, corrosion, or signs of damage.

3. 3

   Verify drive parameters related to input voltage settings and undervoltage trip levels (e.g., L1-01, L2-01) match the actual system supply and electrical drawings.

4. 4

   If the drive utilizes a separate auxiliary control power input (e.g., 24VDC or 110VAC control source), measure its voltage at the dedicated terminals and confirm it is within specified operating limits.