Speck Pumpen Incorrect Phase Rotation

Pump runs backwards (on three-phase models), causing very low flow and noisy operation.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Two phases reversed at motor terminal block, Incorrect wiring in Speck control panel, Recent electrical work altering phase order

Safety first: Only qualified electricians should work on three-phase wiring. Isolate and lock out power.

Correct phase rotation:

At the motor terminal box or control panel, swap any two of the three phase conductors (e.g., L1 and L2).
Secure all terminals and replace covers.
Restore power and briefly run the pump, checking that flow and noise are normal.

Incorrect rotation can damage the pump over time; correct it immediately after installation or service.

Hard 4/5

Speck three-phase motor wiring

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