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Tripped breaker

Not operating - Circuit breaker has tripped

Grundfos · ALPHA3 Pump

What does Tripped breaker mean?

The pump is not receiving power and is not operating because its associated current-operated or voltage-operated circuit breaker has tripped, interrupting the electrical supply.

Common Causes

  • An electrical fault, overcurrent, or voltage anomaly has caused the circuit breaker to trip as a safety measure.
  • A temporary overload on the circuit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Switch off any connected appliances on that circuit, including the pump, to reduce the load.

  2. 2

    Locate your electrical panel and find the tripped circuit breaker (it may be in the 'off' or middle position).

  3. 3

    Firmly push the breaker handle completely to the 'off' position, then reset it by pushing it back to the 'on' position.

  4. 4

    Restore power to the pump and check if it operates normally.

  5. 5

    If the circuit breaker trips repeatedly, consult a qualified electrician to identify and resolve the persistent fault.

Browse all codes in this manual (22)
Verified technical data. Last updated: April 2026

Related Faults

157Real-time clock out of order (157) - Internal clock malfunction40, 75Undervoltage (40, 75) - Supply voltage is too low43Turbine operation (43) - Other water sources are flowing through the stopped pump
Source: Grundfos ALPHA3 Pump
Open Manual (Page 21)Search more codes in this manual