Grundfos STP 2 fault codes

24 codes from the Grundfos manual for the STP 2 shower pump. Pick one for what it means, the likely causes and where to start.

Code	What it means
1	Pompa çalıştırılamıyor (positive displacement pumps)
10	Hortum bağlantısında sızıntı var (universal head pumps)
1A	The pump fails to start (power supply switched off)
1B	The pump fails to start (fuses blown)
1C	The pump fails to start (thermal protection tripped)
1D	The pump fails to start (non-vertical outlet ports)
1E	The pump fails to start (insufficient water flow)
2	Pompa çalışıyor fakat su basmıyor (positive displacement pumps)
2F	The pump runs but delivers no water (isolating valves closed)
2G	The pump runs but delivers no water (strainers blocked)
3	Duştan gelen debi düşüyor (positive displacement pumps)
3A	The flow from the shower drops (strainers blocked)
4	Pompa sürekli olarak çalışıyor (positive displacement pumps)
4C	The pump runs continuously (float stuck in flow switch)
4D	The pump runs continuously (flow switch or reed switch faulty/incorrectly set)
5	Pompada darbe görülüyor (positive displacement pumps)
5A	The pump pulses (other taps causing momentary start)
6	Su sıcaklığı sabit değil veya pompa gürültülü çalışıyor (positive displacement pumps)
6B	Unstable water temperature or noisy pump (too high water temperature)
7	Pompa gürültülü çalışıyor (positive displacement pumps)
7A	Noisy pump (vibration through mounting surface)
8	Hortum bağlantısında sızıntı var (positive displacement pumps)
8A	Hose connection leaking (loose hose connection)
9	Pompa gürültülü çalışıyor (universal head pumps)