Symptom: The Water At The Tap Is Too Cold; Symptom: Heat Pump Failure - Daikin Altherma 3 R F User Reference Manual

7.4 Symptom: The water at the tap is too cold

7.5 Symptom: Heat pump failure

EHVZ04+08S18+23DA6V+9W7
Daikin Altherma 3 R F
4P618960-1 – 2020.03
Possible cause
The desired room temperature cannot
be reached.
The weather-dependent curve is set
incorrectly.
Possible cause
You ran out of domestic hot water
because of unusual high consumption.
The desired DHW tank temperature is
too low.
When the heat pump fails to operate, the backup heater can serve as an
emergency heater and either automatically or non-automatically take over the
heat load.
▪ When auto emergency is set to Automatic and a heat pump failure occurs, the
backup heater will automatically take over the heat load and the domestic hot
water production.
▪ When auto emergency is set to Manual and a heat pump failure occurs, the
domestic hot water and space heating operation will stop and need to be
recovered manually via the user interface. To recover operation manually, go to
the Malfunctioning main menu screen, where the user interface will then ask
you to confirm whether the backup heater can take over the heat load or not.
When the heat pump fails,
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 Weather dependent operation.
If you immediately need domestic hot
water, activate the DHW tank
Powerful operation. However, this
consumes extra energy. See
"4.5.6 Using DHW powerful
operation" [
If the problems recurs daily, do one of
the following:
▪ Increase the DHW tank temperature
preset value. See
4
values" [
▪ Adjust the DHW tank temperature
schedule.
additionally heat up the DHW tank to
a preset value (Eco
lower tank temperature) during the
day. See
programming schedules"
"4.7.4
Example" [
or will appear on the user interface.
7 Troubleshooting
|
Corrective action
"4.4.5 To change
4
19].
Corrective action
4
23].
"4.7.1 Using preset
27].
Example: Program
setpoint =
"4.7.3 Using
4
[ 30] and
Schedule screen:
4
31].
User reference guide
to
and
47