Daikin EHYHBX08AFV3 [205/252] Solving problems based on symptoms

13 | Troubleshooting

Installer reference guide

205

EVLQ05+08CAV3 + EHYHBH05AF + EHYHBH/X08AF + EHYKOMB33AA

Daikin Altherma hybrid heat pump

4P355634-1F – 2020.10

13.3 Solving problems based on symptoms

13.3.1 Symptom: The unit is NOT heating or cooling as expected

Possible causes Corrective action

The temperature setting is NOT correct Check the temperature setting on the

remote controller. Refer to the

operation manual.

The water flow is too low Check and make sure that:

▪ All shut-off valves of the water circuit

are completely open.

▪ The water filter is clean. Clean if

necessary.

▪ There is no air in the system. Purge air

if necessary. You can purge air

manually (see "To perform a manual

air purge" [4 187]) or use the

automatic air purge function (see "To

perform an automatic air

purge"[4188]).

▪ The water pressure is >1bar.

▪ The expansion vessel is NOT broken.

▪ The resistance in the water circuit is

NOT too high for the pump (see the

ESP curve in the "Technical data"

chapter).

If the problem persists after you have

conducted all of the above checks,

contact your dealer. In some cases, it is

normal that the unit decides to use a

low water flow.

The water volume in the installation is

too low

Make sure that the water volume in the

installation is above the minimum

required value (see "6.4.3To check the

water volume and flow rate"[448]).