Daikin EKOMB22AAV1 Installation Instructions Manual page 50

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
Setting of room thermostat is not correct.
No
Temperature is set too low.
No
Pump does not run properly. Pump setting is
too low.
No
No flow through the installation.
No
The boiler power is not set for the installation.
No
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
The service display shows nothing.
No
Flow sensor does not work.
No
Tap flow < 1,5 l/min.
No
No electricity supply on flow sensor (5V DC).
No
S3 faulty.
No
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
CH becomes hot during tapping.
DHW temperature set too low.
No
Daikin Europe NV
Replace the faulty conroller.
Solution:
Check the unit, siphon and output system for contamination.
Yes
Clean unit, siphon and output system.
Solution:
Yes Fill up the installation.
Yes Check the setting and adjust if required.
Increase the CH temperature. See Operation CH. If there is an outdoor sensor:
Yes
Check the outdoor sensor for short circuit: rectify this.
Yes 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
be open.
Yes Adjust the power. See Setting maximum CH power.
Yes Rinse the exchanger/installation on the side of the CH.
Solution:
Yes Check whether the plug is in the socket.
Yes Check the fuse, see Electrical diagram par. 10.1
Yes Replace the flow sensor.
Yes Increase the tap flow.
Yes Check the wiring in accordance with the diagram.
Yes Replace S3.
The thermostatic tap only lets through cold water. This means the tap flow through
Yes
the boiler remains under 1,5. l/min. Check the thermostatic tap.
Solution/cause:
Yes Reduce the tap flow. Check the dosing disk (EKOMB22AAV1 and EKOMB28AAV1)
Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in
Yes the CH circuit. Install a check valve in case of thermosiphon effect or a two-way
valve in case of a second pump.
Yes Increase the DHW temperature, see par. 7.1.
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