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Overvoltage

Overvoltage — Supply voltage is too high

Grundfos · MAGNA3 Pump

What does Overvoltage mean?

This fault indicates that the electrical supply voltage to the pump has risen above the acceptable operating range. Excessive voltage can damage the pump's electronics and motor.

Common Causes

  • Problem with the main power supply or electrical grid.
  • Faulty power regulator or surge protector.
  • Incorrect wiring or misconfiguration.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Immediately turn off the pump to prevent further damage.

  2. 2

    Check the main power supply voltage to ensure it is stable and within the pump's specified limits.

  3. 3

    Inspect electrical connections for any signs of improper wiring.

  4. 4

    If your property experiences frequent overvoltage, consider installing a surge protector or voltage stabilizer.

  5. 5

    Contact a qualified electrician to investigate the electrical supply and connections.

Browse all codes in this manual (24)
Verified technical data. Last updated: April 2026

Related Faults

10Alarm 10 — Communication fault between electronic parts29Alarm 29 — Forced pumping, flow through stopped pump40, 75Alarm 40 or 75 — Supply voltage too low
Source: Grundfos MAGNA3 Pump
Open Manual (Page 21)Search more codes in this manual