Infeed: Failure of One or Several Line Phases

What does F06200 mean?

One or more line supply phases have failed, or an overvoltage condition has occurred. This fault can manifest during power-on due to incorrect phase assignment between a VSM and the power unit, or during operation due to a voltage dip, prolonged overvoltage, severe overload, or a missing line reactor. This immediate OFF2 reaction halts operation and indicates a serious power supply instability or hardware misconfiguration that requires immediate attention to prevent damage.

• Complete loss of one or more incoming AC line phases (e.g., blown fuse, open circuit breaker, utility outage upstream).
• Severe imbalance in incoming line voltages or complete phase reversal in the main power connection.
• Incorrect phase assignment or wiring between the Voltage Sensing Module (VSM) and the power unit, particularly during initial commissioning.
• Momentary or sustained overvoltage condition on one or more phases, exceeding the infeed unit's protection limits.
• Failure of internal voltage sensing hardware within the infeed unit or the connected VSM (Voltage Sensing Module).

Click steps to track your progress.

1. 1

   Immediately de-energize the infeed unit and measure the voltage between all three incoming line phases (L1-L2, L2-L3, L3-L1) and each phase to ground (L1-GND, L2-GND, L3-GND) using a multimeter.

2. 2

   Inspect all upstream protective devices (e.g., circuit breakers, fuses) for tripped conditions or blown elements; replace or reset as necessary.

3. 3

   Verify the phase sequence and wiring connections at the infeed unit's input terminals (e.g., 3L1, 3L2, 3L3) and ensure no phase reversal.

4. 4

   Check connections between the Voltage Sensing Module (VSM) and the infeed power unit for proper seating and secure wiring, if a VSM is utilized.

5. 5

   Review parameter P0210 (Voltage factor for line phase monitoring) and related phase monitoring parameters for correct configuration relevant to the supply voltage.