Grundfos STP 2 fault 3
Duştan gelen debi düşüyor (positive displacement pumps)
Shower pumpWhat it means
Shower flow rate decreasing on positive pressure pumps.
Likely causes
- Filtreler tıkalıdır (Filters blocked)
- Leaks due to insufficient hose insertion depth
- Leak causing loss of tank air pressure
- Low flow rates from cistern filling causing frequent pump cycling
Where to start
- Confirm pump is positioned close to hot and cold water sources
- Confirm good flow rate to pump
- Confirm unrestricted 22 mm pipework
The full answer, free
- 32 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 28), right under the answer
Safety: Isolate power and water, and prove dead before you open or test the pump.
From the Grundfos manual for the STP 2. Check the model on the data plate before you order parts.
Other Grundfos STP 2 fault codes
- 1Pompa çalıştırılamıyor (positive displacement pumps)
- 10Hortum bağlantısında sızıntı var (universal head pumps)
- 1AThe pump fails to start (power supply switched off)
- 1BThe pump fails to start (fuses blown)
- 1CThe pump fails to start (thermal protection tripped)
- 1DThe pump fails to start (non-vertical outlet ports)
- 1EThe pump fails to start (insufficient water flow)
- 2Pompa çalışıyor fakat su basmıyor (positive displacement pumps)
- 2FThe pump runs but delivers no water (isolating valves closed)
- 2GThe pump runs but delivers no water (strainers blocked)
- 3AThe flow from the shower drops (strainers blocked)
- 4Pompa sürekli olarak çalışıyor (positive displacement pumps)
- 4CThe pump runs continuously (float stuck in flow switch)
- 4DThe pump runs continuously (flow switch or reed switch faulty/incorrectly set)
- 5Pompada darbe görülüyor (positive displacement pumps)
- 5AThe pump pulses (other taps causing momentary start)
- 6Su sıcaklığı sabit değil veya pompa gürültülü çalışıyor (positive displacement pumps)
- 6BUnstable water temperature or noisy pump (too high water temperature)
- 7Pompa gürültülü çalışıyor (positive displacement pumps)
- 7ANoisy pump (vibration through mounting surface)
- 8Hortum bağlantısında sızıntı var (positive displacement pumps)
- 8AHose connection leaking (loose hose connection)
- 9Pompa gürültülü çalışıyor (universal head pumps)