Daikin Altherma not working.

[Canski]

Hi all.  I’m after some help. My Daikin Altherma  has been working fine until yesterday but now I have no heat. When the unit is switched on the circulator runs until about 30 l/min flow then after about 90 seconds it switches off. No fault codes are showing. I’ve tried an hard reboot as well as a full reset on the controller but no luck. Any ideas what to do ?

[Bramco]

Not sure if this is fixed already but try posting on the open energy monitor forum - there's a lot of discussion about Daikin's on there. More about getting them set up properly but there's a lot of experience.

[Canski]

On 11/01/2025 at 18:08, Bramco said:

Not sure if this is fixed already but try posting on the open energy monitor forum - there's a lot of discussion about Daikin's on there. More about getting them set up properly but there's a lot of experience.

I’ve only just seen this but thank you. Daikin can’t work out the problem remotely so are sending an engineer to meet the installer on Thursday. 

[Canski]

Update ….

 

the heat pump burst back into life on Wednesday night all by itself. We informed daikin and they cancelled the call out. It’s a bit of a bugger really as I still don’t know what the issue was.

 

I feel that it is connected to the cold weather but I won’t know until the next cold spell. Luckily I was away for the last breakdown.