Daikin 9kW ASHP application discussion

[Stephen_Crown]

@squarepeg77

@Stephen_Crown can you please confirm the settings you’ve used to completely disable the backup heater?

I will also flip the breaker, but would like the settings to match so it doesn’t try to use a BUH that isn’t powered.

Hi @squarepeg77

Here is the relevant info:

Disable BUH through configuration:

Daikin Controller —> Installer settings —> Backup Heater —> Operation —> “Restricted”

Check running hours here (mine is still 0hrs since September’22)

Daikin controller → Information → Running Hours → BUH

Also as covered in these links, I’ve flipped the switch for the BUH breaker in the consumer unit outside next to the heat pump:

My heat pump is now running at a COP of less than 1.0, help!

Daikin controller → Information → Running Hours → BUH Apologies for rubbish photo: [image] [IMG_7820]

Daikin LWT

Is that 1hr of BUH use? As in the below? (Just double checking the photo) Daikin controller → Information → Running Hours → BUH I would honestly disable its use (log in as “user profile” installer with code: 5678) Then go to: Daikin Controller —> Installer settings —> Backup Heater —> Operation —> “Restricted” Then go back to main menu and “User Profile” —> “Advanced User (code: 1234)