Daikin EWAA016DAV3P - Symptom: You Are Feeling too Cold (Hot) in Your Living Room; Symptom: Unit Failure

8 | Troubleshooting
User reference guide
51
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620246-1B – 2023.11
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 "5.6.4To change the
desired room temperature"[427].
If the problem recurs daily, do one of
the following:
▪ Increase (decrease) the room
temperature preset value. See
"5.7.1Using preset values"[429].
▪ Adjust the room temperature
schedule. See "5.7.2 Using and
programming schedules" [4 29] and
"5.7.3 Schedule screen:
Example"[432].
The desired room temperature cannot
be reached.
Increase the desired leaving water
temperature in accordance with the
heat emitter type. See "5.6.5To change
the desired leaving water
temperature"[428].
The weather-dependent curve is set
incorrectly.
Adjust the weather-dependent curve.
See "5.8Weather-dependent
curve"[438].
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.
(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.