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Grundfos STP 2 fault 6

Su sıcaklığı sabit değil veya pompa gürültülü çalışıyor (positive displacement pumps)

Shower pump

What it means

Water temperature unstable or pump running noisily on positive pressure pumps.

Likely causes

  1. Genellikle sıcak su silindirinden pompaya su giriyordur (Air ingress typically from hot water cylinder into pump)
  2. Su sıcaklığı çok yüksektir (Water temperature too high)
  3. Çark gövdesine yabancı madde sıkışmıştır (Foreign matter jammed in impeller housing)
  4. Blocked strainers common on initial pump installation or new buildings due to jointing compounds, tapes, flux and debris flushed through system
  5. Leak causing loss of tank air pressure

Where to start

  1. Turn on water supply and fill system
  2. Check for leaks before starting
  3. Allow maximum water flow with pump not running (e.g., remove shower head from hose)

The full answer, free

  • 23 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
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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