Truma Combi 4e

[Matt67]

Use INet x app . Turned on water using app early morning to heat water. Turned it off when ready .Then turned on heater air flow system set at comfort speed but heard the fan coming on in fast mode to start with then slowed down . Nothing came up on app. However I notice that I have an error catalogue on my app. for this date.
Error catalogue 131447
Think the 131 is for lost connection between heater and panel . Not sure of 447 or I’m not sure of anything about it to be honest . Any body help

 

[BryanW]

Code 0131 is low voltage (12v) under load cant find anything on 447 will keep looking

 

[Googlebot]

Ours sometimes whizzes round before slowing down to normal.

 

[Matt67]

Code 0131 is low voltage (12v) under load cant find anything on 447 will keep looking

Thanks Matt
Here’s the pic of Truma app error code