Name: Junkers Ceraclass Excellence ZWC 28-3 MFK Circulating Pump Ref. 87160113940
Brand: Junkers
SKU: BCCJZWC31
Price: 50 EUR
Availability: InStock

Question 1

¿Cómo identifico esta bomba?

Accepted Answer

La unidad fotografiada muestra 8 716 011 394, Grundfos UPS0 15-60 CACAO y P/N 59936552. La referencia comercial completa es 87160113940.

Question 2

¿Con qué caldera es compatible?

Accepted Answer

Compatible con Junkers Bosch Ceraclass Excellence ZWC 28-3 MFK. Compare etiqueta, referencia y conexiones.

Question 3

¿Cuál es la referencia sucesora?

Accepted Answer

La referencia sucesora contrastada es 8737604214.

Question 4

What does fault code E9 mean on Junkers?

Accepted Answer

Thermal block or flue gas temperature limiter triggered (overheating). If the circulating pump is blocked/faulty, there is no flow, the water in the heat exchanger overheats, and the limiter is activated, displaying E9. Verify by activating heating and checking that the pump rotates and delivers flow (∆T supply/return and consumption/voltage at terminals), bleeding the system if necessary.

Question 5

What does the d4 code mean on Junkers?

Accepted Answer

Overtemperature: the difference/gradient between flow and return exceeds the allowed limit (heating). A pump that does not circulate or has insufficient flow causes the flow temperature to rise very quickly compared to the return, and the control generates d4. Check for abnormal ∆T and test the pump (voltage at terminals, rotation/unblocking, and bleed), as well as the bypass.

Junkers Ceraclass Excellence ZWC 28-3 MFK Circulating Pump Ref. 87160113940

Key Data

Junkers/Bosch Ceraclass Excellence

Code	What does it mean?	Cause and diagnosis (this part)
E9	Thermal block or flue gas temperature limiter triggered (overheating).	If the circulating pump is blocked/faulty, there is no flow, the water in the heat exchanger overheats, and the limiter is activated, displaying E9. Verify by activating heating and checking that the pump rotates and delivers flow (∆T supply/return and consumption/voltage at terminals), bleeding the system if necessary.
d4	Overtemperature: the difference/gradient between flow and return exceeds the permitted limit (heating).	A pump that does not circulate or has insufficient flow causes the flow temperature to rise very quickly compared to the return, and the control generates d4. Check for abnormal ∆T and test the pump (voltage at terminals, rotation/unblocking, and bleed), as well as the bypass.