Daikin EWAA011DAV3P - 8 Troubleshooting; To Display the Help Text in Case of a Malfunction; To Check the Malfunction History; Symptom: You Are Feeling too Cold (Hot) in Your Living Room

8 Troubleshooting
Operation manual
16
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620244-1C – 2023.11
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg]/1000
Contact your installer for more information.
8 Troubleshooting
Contact
For the symptoms listed below, you can try to solve the problem
yourself. For any other problem, contact your installer. You can find
the contact/helpdesk number via the user interface.
1 Go to [8.3]: Information > Dealer information.
8.1 To display the help text in case of a
malfunction
In case of a malfunction, the following will appear on the home
screen depending on the severity:
▪ : Error
▪ : Malfunction
You can get a short and a long description of the malfunction as
follows:
1 Press the left dial to open the main menu and go to
Malfunctioning.
Result: A short description of the error and the error
code is displayed on the screen.
2 Press in the error screen.
Result: A long description of the error is displayed
on the screen.
8.2 To check the malfunction history
Conditions: The user permission level is set to advanced end user.
1 Go to [8.2]: Information > Malfunction history.
You see a list of the most recent malfunctions.
8.3 Symptom: You are feeling too cold
(hot) in your living room
Possible cause Corrective action
The desired room temperature is
too low (high).
Increase (decrease) the desired
room temperature. See "5.6.2To
change the desired room
temperature"[411].
If the problem recurs daily, do
one of the following:
▪ Increase (decrease) the room
temperature preset value. See
the user reference guide.
▪ Adjust the room temperature
schedule. See "5.7 Schedule
screen: Example"[411].
Possible cause Corrective action
The desired room temperature
cannot be reached.
Increase the desired leaving
water temperature in accordance
with the heat emitter type. See
"5.6.3To change the desired
leaving water temperature"[411].
The weather-dependent curve is
set incorrectly.
Adjust the weather-dependent
curve. See "5.8Weather-
dependent curve"[413].
8.4 Symptom: Unit failure
When the heat pump fails to operate, the optional external backup
heater kit can serve as an emergency heater. It then takes over the
heat load either automatically or by manual interaction.
▪ When Emergency is set to Automatic (or auto SH normal/DHW
off)
(1)
and a heat pump failure occurs, the backup heater
automatically takes over the heat load.
▪ When Emergency is set to Manual and a heat pump failure
occurs, the space heating stops.
To manually recover it via the user interface, go to the
Malfunctioning main menu screen and confirm whether the
backup heater can take over the heat load or not.
▪ When Emergency is set to auto SH reduced/DHW off (or auto
SH reduced/DHW on)
(2)
and a heat pump failure occurs, space
heating is reduced.
Similarly as in Manual mode, the unit can take the full load with
the backup heater if the user activates this via the
Malfunctioning main menu screen.
When the unit fails, or will appear on the user interface.
Possible cause Corrective action
Unit is damaged. See "8.1To display the help text
in case of a malfunction"[416].
INFORMATION
When the backup heater takes over the heat load,
electricity consumption will be considerably higher.
8.5 Symptom: The system is making
gurgling noises after
commissioning
Possible cause Corrective action
There is air in the system. Purge air from the system.
(a)
Incorrect hydraulic balance. To be performed by the installer:
1 Perform hydraulic balancing
to assure that the flow is
correctly distributed
between the emitters.
2 If hydraulic balancing is not
sufficient, change the pump
limitation settings ([9-0D]
and [9-0E] if applicable).
Various malfunctions.
Check if or is displayed
on the home screen of the user
interface. See "8.1To display the
help text in case of a
malfunction"[416] for more
information about the
malfunction.
(1)
auto SH normal/DHW off has the same effect as Automatic, but should NOT be used because there is no domestic hot water.
(2)
auto SH reduced/DHW on has the same effect as auto SH reduced/DHW off, but should NOT be used because there is no domestic hot
water.