8
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Troubleshooting
User reference guide
58
ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663480-1 – 2021.07
▪
When
Emergency
is set to
Automatic
and a heat pump failure occurs, the
backup heater or boiler automatically takes over the domestic hot water
production and space heating.
▪
When
Emergency
is set to
Manual
and a heat pump failure occurs, the
domestic hot water heating and 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.
▪
Alternatively, when
Emergency
is set to:
-
auto SH reduced/DHW on
, space heating is reduced but domestic hot
water is still available.
-
auto SH reduced/DHW off
, space heating is reduced and domestic hot
water is NOT available.
-
auto SH normal/DHW off
, space heating operates as normally but
domestic hot water is NOT available.
Similarly as in
Manual
mode, the unit can take the full load with the backup
heater or boiler if the user activates this via the
Malfunctioning
main menu
screen.
When the heat pump fails, or
will appear on the user interface.
Possible cause
Corrective action
Heat pump is damaged.
"8.1 To display the help text in case
56].
INFORMATION
When the backup heater takes over the heat load, electricity consumption will be
considerably higher.
8.6 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"
information about the malfunction.
(a)
We recommend to purge air with the air purge function of the unit (to be performed by
the installer). If you purge air from the heat emitters or collectors, mind the following:
