Daikin RHOBG12AAV1, Installation Instructions Manual

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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: Set to 0.1 A.
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 hot water (only applicable in indirectly fired tank)
Possible causes: Solution:
The service display shows a hyphen (
-
).
The unit is off.
Yes Æ Switch on the unit with the button.
No È
No electricity supply on the three-way valve. Yes Æ Check the wiring in accordance with the diagram.
No È
Three-way valve does not switch. Yes
Æ
Replace three-way valve.
No È
No electricity supply on tank sensor/thermostat
(5V DC).
Yes Æ Check the wiring in accordance with the diagram.
No È
Boiler controller does not come in on DHW:
boiler sensor/thermostat faulty.
Yes Æ Replace the tank sensor/thermostat.
No
È
Boiler controller does not ignite. Yes Æ See boiler controller does not ignite.
8.3.7 DHW does not reach desired temperature (only applicable for indirectly fired tank)
Possible causes: Solution:
Tank temperature is set too low. Yes Æ Set tank temperature. See Setting and adjustment
8.3.8 CH installation stays warm unwanted
Possible causes: Solution/cause:
Room thermostat/weather dependent regulation
faulty or short circuited.
Yes Æ
Check the wiring.
Check OpenTherm and On/off connection of the unit.
Replace the thermostat.
Replace the weather-dependent regulation.