Undervoltage

Hva betyr Uv1 ?

The drive detected an undervoltage condition in the main circuit power supply. This indicates that the incoming AC voltage is below the acceptable operating threshold.

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1. 1

   Measure the incoming AC line voltage (L1, L2, L3) at the drive's input terminals (R/L1, S/L2, T/L3) and compare it against the drive's nominal voltage rating and acceptable operating range.

2. 2

   Inspect all power wiring connections from the main disconnect/circuit breaker to the drive's input terminals for tightness and integrity.

3. 3

   Verify the main power supply circuit breaker or fuses feeding the drive for proper rating and operational status (e.g., trip status, continuity).

4. 4

   Check for voltage sags or brownouts on the incoming power supply, especially under load conditions, using a multimeter with min/max function or a power quality analyzer if available.