Daikin Altherma troubleshooting for homeowners

Fault codes

Questions	Answers
	Step 1	Step 2	Step 3
My remote controller shows a blank display?	Check your main switch board to ensure the circuit breaker is switched on.	Check isolator is switched on (located next to outdoor unit).	If the remote controller is still blank please contact your installer/maintenance company.
The sanitary water cylinder is not heating?	Make sure isolation switch is turned on (located next to sanitary hot water cylinder).	Check to see if the shower head is displayed on the controller. If yes, water should be in heating process. If no, push shower head button once to activate. For powerful sanitary water heating, push and hold shower head for 5 seconds. Your booster heater symbol and shower head symbol should flash simultaneously.
The sanitary water is not hot enough?	Check to see if the sanitary water heating timers are set correctly.	Using your shower head up and down button check the sanitary water set point (set point is your desired storage temperature).
The space heating temperature is not hot enough?	Check that your room thermostat is set above the room temperature.	If the red light is illuminated on the top right of the controller, using your temperature up and down buttons the flow temperature can be adjusted.
The red light on my controller is flashing?	The Daikin Altherma unit has a fault diagnostics please check the left hand corner of the controller for a fault code and contact your installer with this code.

Daikin Altherma - warranty help

I do not have or have lost my registration card, what should I do?	Go to warranty registration and complete the online warranty registration form
I have a fault on my system, what should I do?	Contact your installer/maintenance company.
I have a fault on my system and cannot contact my installer / maintenance company, what should I do?	Please contact Daikin UK on 0845 641 9271
I have a fault on my system but I do not have a maintenance company, what should I do?	Please contact Daikin UK on 0845 641 9271
When contacting Daikin UK what information will I need to provide?	Please provide the model and serial number of your indoor or outdoor unit. This can be found on the copy of the commissioning report, or on the name plate of the outdoor unit.