Grundfos STP 2 fault 4
Pompa sürekli olarak çalışıyor (positive displacement pumps)
Shower pumpWhat it means
Pump runs continuously on positive pressure pumps.
Likely causes
- Sistemde hava vardır (Air in system)
- Akış anahtarı şamandırası (açık) pozisyonda kalmıştır (Flow switch float stuck in open position)
- Akış anahtarı veya reed anahtarı arızalıdır veya yanlış ayarlanmıştır (Flow switch or reed switch faulty or incorrectly set)
- Mechanical stress on pump from rigid pipe connection
- Mechanical strain on pump from misaligned pipework
- Solder joint heat damaging plastic pump components
- Air pockets from incorrectly routed pipework
- Additional outlet fittings on inlet pipework causing incorrect flow switch operation
Where to start
- Verify pump switch remains in 'I/ON' position at all times during normal operation
- Allow maximum water flow with pump not running (e.g., remove shower head from hose)
- Turn on power supply, run pump for a few minutes, turn off power, drain water and clean suction filters
The full answer, free
- 17 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)
- 3Duştan gelen debi düşüyor (positive displacement pumps)
- 3AThe flow from the shower drops (strainers blocked)
- 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)