Overvoltage (74) - Supply voltage is too high

What does 74 mean?

The electrical supply voltage to the pump is exceeding the specified operating range. This alarm indicates a potential risk of damage to the pump's electronic components.

• Instability or spikes in the main power supply.
• Incorrect electrical wiring or connections leading to higher than specified voltage.
• A fault in the electrical installation.

Click steps to track your progress.

1. 1

   Switch off the pump at the main power supply immediately to prevent further damage.

2. 2

   Consult a qualified electrician to check the incoming voltage at the pump's connection point.

3. 3

   Ensure the power supply is stable and within the voltage range specified for the Grundfos ALPHA3 pump.

4. 4

   Only restore power once the overvoltage issue is confirmed to be resolved and safe.