8 | Troubleshooting
User reference guide
57
EBVZ16S18+23DJ
Daikin Altherma 3 R F
4P643608-1 – 2021.09
8.5 Symptom: Heat pump failure
When the heat pump fails to operate, the backup heater 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 and a heat pump failure occurs, the
backup heater 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 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. See "8.1To display the help text in case
of a malfunction"[455].
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).
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