Name: Saunier Duval Hermann Circulating Pump Ref. 0020023217
Brand: Renova
SKU: BCRTF23E
Price: 65 EUR
Availability: InStock

Question 1

What does fault code F.75 mean in Renova?

Accepted Answer

Error in the pump/lack of water: no pressure increase detected when the pump starts. The circulator 0020023217 is blocked or faulty and does not generate the pressure increase that the sensor should read; verify by activating the pump directly (rotation/consumption) and observing the pressure sensor value during pre-start.

Question 2

What does fault code F.23 mean in Renova?

Accepted Answer

Safety shutdown: excessive flow/return temperature variation (lack of circulation). If the 0020023217 does not provide flow (blocked or with reduced power), the flow heats up much faster than the return; check the pump's consumption/rotation and the ΔT in diagnostics.

Question 3

What does the fault code F.24 mean in Renova?

Accepted Answer

Safety shutdown: temperature rise too quickly due to lack of circulation. The fault of the 0020023217 causes a sudden temperature increase in the primary; check that the pump is rotating and providing flow (bleed/diagnostic mode) and that there is no air in the circuit.

Question 4

What does fault code F.20 mean in Renova?

Accepted Answer

Safety shutdown: temperature limiter (heat exchanger overheating). With the 0020023217 blocked or not performing, the water does not circulate and the heat exchanger overheats, triggering the limiter; check pump rotation/consumption, bleed, and confirm actual flow rate.

Code	What does it mean?	Cause and diagnosis (this part)
F.75	Pump error/lack of water: no pressure increase detected when the pump starts.	The circulator 0020023217 is blocked or faulty and does not generate the pressure increase that the sensor should read; check by activating the pump directly (rotation/consumption) and observing the pressure sensor value during the pre-start.
F.23	Safety shutdown: excessive flow/return temperature variation (lack of circulation).	If the 0020023217 does not provide flow (blocked or with reduced power), the flow heats up much faster than the return; check the pump's consumption/rotation and the ΔT in diagnostics.
F.24	Safety shutdown: temperature rise too fast due to lack of circulation.	The fault of the 0020023217 causes a sudden rise in temperature in the primary; check that the pump is rotating and providing flow (bleed/diagnostic mode) and that there is no air in the circuit.
F.20	Safety shutdown: temperature limiter (heat exchanger overheating).	With the 0020023217 blocked or without performance, the water does not circulate and the heat exchanger overheats until the limiter trips; check pump rotation/consumption, bleed, and confirm actual flow rate.

Saunier Duval Hermann Circulating Pump Ref. 0020023217

Key Data

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