Ecodan r32 keeps flipping into immersion mode.

[MorganP]

Morning hive mind - really hope you can help.

 

We have a Ecodan r32 installed about 3 years ago. Not long after, it would occasionally flip into immersion mode and need restarting. Since then it has gradually got worse and is now happening every day or two. Some details

 

- no faults showing

- legionella mode set to 30 days

- Heating is auto adaptive mode

- House has rads upstairs, UFH down

- Stats run through wireless UH8-RF V2

- Seems worse when stats are calling for heat. When all stats are off then it doesn't happen so often

- immersion mode doesn't seem to heat the water either - only around 18 degrees

 

We've spent hundreds on not getting it fixed so need a different route! Original installers not very helpful; charge for call out but don't fix issues. We have a decent freelancer who does the annual service but he doesn't seem able to fix it either. 

 

My wife is now threatening to take the kids to live in a hotter country (again).

[JohnMo]

It has to be a basic setting messed up.

 

Let's go back to basics

Why is the immersion there - to provide additional heat when the heat pump isn't working or cannot provide enough energy heat the house.  It is activated based on timers based on getting temperature water flow temperature up to an expected level.

 

You can have the immersion heater modes set various ways and for various times.

 

I would get the manual out and have a good read, understand what is happening.  Post your settings on here - possibly your manual also.

 

17 minutes ago, MorganP said:

legionella mode set to 30 days

Unless you have health reasons to use it, I wouldn't bother with mode - do a risk assessment - many available online.

 

Also are you talking about your heating or domestic hot water?

[MorganP]

56 minutes ago, JohnMo said:

Also are you talking about your heating or domestic hot water?

 

Thanks John.

 

Our Heat Pump does both heating and hot water but I'm not sure what immersion mode is trying to do when it kicks in. Maybe just supply the domestic hot water. Either way, it doesn't work as it never gets above 20°

 

I'll have a proper look through the settings and report back.