Ämne: VVM 225 - Temperature limiter alarm (52)

[Joeyaza]

Hey everyone sorry for English I am still learning Swedish!

I have been getting this alarm every few days on my Nibe VVM225.
The installer came on Friday and said nothing was wrong with the boiler itself, but I should start opening the radiators fully in the house and using the boiler curve to decide the temperature. Its radiators upstairs and underfloor heating downstairs by the way.

I have some metrics from the alarm logs maybe I can share, and any would be appreciated greatly! tack!

Alarm Log 1

BT63 - 84.9 oC
BT6 - 49.6 oC
BT2 - 23.3 oC

Alarm Log 2

BT63 - 86.7 oC
BT6 - 49.5 oC
BT2 - 31.3 oC

Alarm Log 3

BT63 - 22.0 oC
BT6 - 49.6 oC
BT2 - 21.3 oC

Alarm Log 4

BT63 - 90.6 oC
BT6 - 49.8 oC
BT2 - 26.8 oC

Alarm Log 5

BT63 - 90.2 oC
BT6 - 57.2 oC
BT2 - 52.4 oC

Alarm Log 6

BT63 - 90.9 oC
BT6 - 56.6 oC
BT2 - 36.8 oC


thank you for any or advice !

[Carl N]

It seems to be very poor circulation in the system.
I guess that the circulation pump is broken.