Symptom: You Are Feeling Too Cold (Hot) In Your Living Room; Symptom: Unit Failure - Daikin EWAA008D2V3P User Reference Manual

8.3 Symptom: You are feeling too cold (hot) in your living room

8.4 Symptom: Unit failure

(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.
EWAA004~008D2 + EWYA004~008D2
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688016-1 – 2022.04
Possible cause
The desired room temperature is too
low (high).
The desired room temperature cannot
be reached.
The weather-dependent curve is set
incorrectly.
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)
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
(2)
reduced/DHW on)
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
Increase (decrease) the desired room
temperature. See
desired room
If the problem recurs daily, do one of
the following:
▪ Increase
temperature
"5.7.1 Using preset
▪ Adjust
schedule. See
programming
"5.7.3
Example" [
Increase the desired leaving water
temperature in accordance with the
heat emitter type. See
the desired leaving water
temperature" [
Adjust the weather-dependent curve.
See "5.8 Weather-dependent
curve" [
SH reduced/DHW
and a heat pump failure occurs, space heating is reduced.
will appear on the user interface.
8 Troubleshooting
|
Corrective action
"5.6.4 To change the
4
temperature" [ 28].
(decrease) the
preset value.
4
values" [
the room temperature
"5.7.2 Using and
4
schedules" [
Schedule
4
33].
"5.6.5 To change
4
29].
4
40].
off (or auto
User reference guide
room
See
30].
31] and
screen:
(1)
and
SH
53