Alarm 40 or 75 — Undervoltage

What does 40, 75 mean?

The electrical supply voltage reaching the pump is too low, which can prevent proper operation and has caused the pump to stop.

• Insufficient voltage from the main power supply.
• Issues with the electrical wiring or connections leading to the pump.

Click steps to track your progress.

1. 1

   Ensure that the main power supply is within the voltage range specified for the pump.

2. 2

   Check all electrical connections to the pump for looseness or corrosion.

3. 3

   If possible, use a multimeter to verify the incoming voltage at the pump's terminals.

4. 4

   Consult an electrician to inspect the power supply circuit and identify the source of undervoltage.