Daikin EKOMB22AAV1H Instructions D'installation page 48

8.3.4 The power is reduced
Possible causes:
At a high level of rpm, the power has decreased
by more than 5%.
8.3.5 CH is not reaching correct temperature
Possible causes:
Water pressure in installation is too low
No È
Setting of room thermostat is not correct.
No È
Temperature is set too low.
No È
Pump does not run properly. Pump setting is
too low.
No È
No flow through the installation.
No È
The boiler power is not set for the installation.
No È
No heat transfer due to contamination in the
exchanger/installation.
8.3.6 No domestic hot water
Possible causes:
The service display shows nothing.
No È
The service display shows nothing.
No È
Flow sensor does not work.
No È
Tap flow < 1,5 l/min.
No È
No electricity supply on flow sensor (5V DC).
No È
S3 faulty.
No È
The thermostatic shower or bath tap is faulty.
8.3.7 DHW is not reaching the correct temperature
Possible causes:
Tap flow too high.
No È
CH becomes hot during tapping.
DHW temperature set too low.
No È
Insufficient heat transfer due to lime scale or
contamination in the CH boiler on the tap water
Daikin Europe NV
Solution:
Check the unit, siphon and output system for contamination.
Yes Æ
Clean unit, siphon and output system.
Solution:
Yes Æ Fill up the installation.
Yes Æ Check the setting and adjust if required.
Increase the CH temperature. See Operation CH. If there is an outdoor sensor:
Yes Æ
Check the outdoor sensor for short circuit: rectify this.
Yes Æ Increase the pump setting or replace the pump.
Check whether there is a flow through the installation: at least 2 or 3 radiators must
Yes Æ
be open.
Yes Æ Adjust the power. See Setting maximum CH power.
Yes Æ Rinse the exchanger/installation on the side of the CH.
Solution:
Yes Æ Check whether the plug is in the socket.
Yes Æ Check the fuse, see Electrical diagram par. 10.1
Yes Æ Replace the flow sensor.
Yes Æ Increase the tap flow.
Yes Æ Check the wiring in accordance with the diagram.
Yes Æ Replace S3.
The thermostatic tap only lets through cold water. This means the tap flow through
Yes Æ
the boiler remains under 1,5. l/min. Check the thermostatic tap.
Solution/cause:
Reduce the tap flow. Check the dosing disk (EKOMB22AAV1H and
Yes Æ
EKOMB28AAV1H)
Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in
Yes Æ the CH circuit. Install a check valve in case of thermosiphon effect or a two-way
valve in case of a second pump.
Yes Æ Increase the DHW temperature, see par. 7.1.
Yes Æ Remove lime scale or rinse the CH boiler on the tap water side.
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