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Errors


Boiler type Q175CP

Error code bl85

Cause:

No water fl ow can be detected throughthe controller. De-aeration cycle is started. When water fl ow is detected during this cycle, the de-aeration cycle is terminated and the burner is released. The controller checks the water pressure during static and dynamic situation.

Solution:

-Check the installation for the presence of air;If there is a secondary pump installed and it is not hydraulicly separated, it could cause pressure differences.
-Check the use of balancing valves

-check if the pump is functioning and/or that the water pressure sensor 
is working properly; Polluted pump; Polluted water pressure sensor; Polluted water fi lter; Wiring of pump.