Circulators

The most frequently sold pump on our shops is the Dab evosta. The warranty period for this pump is 5 years.

Questions to ask:

Does the axe turn?
Loosen the brass screw on the pump and check if they can see the axe turn on the inside of the pump
Is the axe blocked?
If this occurs after the summer period (and the pump has not been used at all), this is not covered by warranty. The pump should be switched on regularly
The customer can try to unblock the axe with the help of this video: https://www.youtube.com/watch?v=1JOvdSzSdN8
The pump can be cleaned: If there is dirt between the impeller and the pump body, unscrew the 4 socket head screws and clean them with sandpaper or a steel brush. If there is dirt between the rotor and the inside of the motor, remove the rotor and clean it with a cloth.

Do the led lights blink?
There are led lights on the pump. These lights blink in case of errors. Ask the customer for a video to determine what situation applies
If 3 leds blink 2 times: the axe is blocked. See above.
If 3 leds blink 3 times: ask if the customer uses a switch and if yes, ask to remove it and try again.
If 3 leds blink 5 times: this is most likely covered by warranty. Ask Fred

No lights at all?

The Evosta should always turn on when connected right. At least the LEDs in the display should light up. If this is not happening, the cable was probably not connected right.

If the 3-phase wire is connected the right way (neutral, live wire and protective earth) and the pump is still not working, it could be possible that the three pins in the Evosta connector are bent. This prevents the completion of the electrical circuit.  Disconnect the cable from the power outlet and carefully try to bend straight the three pins inside the connector.

Deblocking Grundfos Alpha 1:

If the pump is blocked, the shaft needs to be unlocked. The pump unlocking tool is accessible from the front of the pump without dismantling the control cabinet. The force of the tool is sufficient to unlock pumps that are blocked by lime deposits, for example, when the pump is inactive during the summer.
Actions to be taken:
Cut off the electrical supply.
Close the valves.
Locate the unlocking screw in the middle of the control cabinet. Use a size 2 Phillips screwdriver to turn the unlocking screw.
If the screw can be turned counterclockwise, the shaft is unlocked. Repeat step 3 if necessary.
Restore the electrical supply.