Daikin EKOMB28AAV1H [48/432] The power is reduced
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Daikin EKOMB28AAV1H [48/432] The power is reduced

Daikin EKOMB28AAV1H [48/432] The power is reduced
Daikin Europe NV 48
8.3.4 The power is reduced
Possible causes:
Solution:
At a high level of rpm, the power has decreased
by more than 5%.
Yes Æ
Check the unit, siphon and output system for contamination.
Clean unit, siphon and output system.
8.3.5 CH is not reaching correct temperature
Possible causes:
Solution:
Water pressure in installation is too low
Yes Æ
Fill up the installation.
No È
Setting of room thermostat is not correct.
Yes Æ
Check the setting and adjust if required.
No È
Temperature is set too low.
Yes Æ
Increase the CH temperature. See Operation CH. If there is an outdoor sensor:
Check the outdoor sensor for short circuit: rectify this.
No È
Pump does not run properly. Pump setting is
too low.
Yes Æ
Increase the pump setting or replace the pump.
No È
No flow through the installation.
Yes Æ
Check whether there is a flow through the installation: at least 2 or 3 radiators must
be open.
No È
The boiler power is not set for the installation.
Yes Æ
Adjust the power. See Setting maximum CH power.
No È
No heat transfer due to contamination in the
exchanger/installation.
Yes Æ
Rinse the exchanger/installation on the side of the CH.
8.3.6 No domestic hot water
Possible causes:
Solution:
The service display shows nothing.
Yes Æ
Check whether the plug is in the socket.
No È
The service display shows nothing.
Yes Æ
Check the fuse, see Electrical diagram par. 10.1
No È
Flow sensor does not work.
Yes Æ
Replace the flow sensor.
No È
Tap flow < 1,5 l/min.
Yes Æ
Increase the tap flow.
No È
No electricity supply on flow sensor (5V DC).
Yes Æ
Check the wiring in accordance with the diagram.
No È
S3 faulty.
Yes Æ
Replace S3.
No È
The thermostatic shower or bath tap is faulty.
Yes Æ
The thermostatic tap only lets through cold water. This means the tap flow through
the boiler remains under 1,5. l/min. Check the thermostatic tap.
8.3.7 DHW is not reaching the correct temperature
Possible causes:
Solution/cause:
Tap flow too high.
Yes Æ
Reduce the tap flow. Check the dosing disk (EKOMB22AAV1H and
EKOMB28AAV1H)
No È
CH becomes hot during tapping.
Yes Æ
Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in
the CH circuit. Install a check valve in case of thermosiphon effect or a two-way
valve in case of a second pump.
DHW temperature set too low.
Yes Æ
Increase the DHW temperature, see par. 7.1.
No È
Insufficient heat transfer due to lime scale or
contamination in the CH boiler on the tap water
Yes Æ
Remove lime scale or rinse the CH boiler on the tap water side.

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