Daikin Altherma 3 M - Symptom: the Compressor Does NOT Start (Space Heating or Domestic Water Heating); Symptom: the System Is Making Gurgling Noises after Commissioning

15 | Troubleshooting
Installer reference guide
236
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06
15.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating)
Possible causes Corrective action
The unit must start up out of its
operation range (the water
temperature is too low)
If the system contains a backup
heater:
If the water temperature is too low, the
unit uses the backup heater to reach
the minimum water temperature first
(15°C).
Check and make sure that:
▪ The power supply to the backup
heater is correctly wired.
▪ The backup heater thermal protector
is NOT activated.
▪ The backup heater contactors are
NOT broken.
If the system does NOT contain a
backup heater:
It may be required to start up with a
small water volume. To do this,
gradually open the heat emitters. As a
result, the water temperature will
gradually rise. Monitor the inlet water
temperature and make sure it does NOT
drop below 25°C.
If the problem persists after you have
done all of the above checks, contact
your dealer.
The preferential kWh rate power supply
settings and electrical connections do
NOT match
This should match with the connections
as explained in:
▪ "To connect the main power
supply"[497]
▪ "About preferential kWh rate power
supply"[489]
▪ "Overview of electrical connections
except external actuators"[490]
The preferential kWh rate signal was
sent by the electricity company
In the user interface of the unit, go to
[8.5.B] Information > Actuators >
Forced off contact.
If Forced off contact is On, the
unit is operating under the preferential
kWh rate. Wait for the power to return
(maximum 2hours).
15.3.4 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)