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14
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Troubleshooting
14.3.2 Symptom: Hot water does NOT reach the desired temperature
14.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating)
14.3.4 Symptom: The system is making gurgling noises after commissioning
Installer reference guide
252
Possible causes
One of the tank temperature sensors is
broken.
Possible causes
The compressor cannot start if the
water temperature is too low. The unit
will use the backup heater to reach the
minimum water temperature (15°C),
after which the compressor can start.
The preferential kWh rate power supply
settings and electrical connections do
NOT match
The preferential kWh rate signal was
sent by the electricity company
Domestic hot water (including
disinfection) and space heating
operation are scheduled to start at the
same time.
Possible cause
There is air in the system.
Corrective action
See the service manual of the unit for
the corresponding corrective action.
Corrective action
If the backup heater doesn't start
either, 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 problem persists, contact your
dealer.
This should match with the connections
as explained in:
▪
"9.3.1 To connect the main power
4
supply" [
118]
▪
"9.1.4 About preferential kWh rate
4
power
supply" [
104]
▪
"9.1.5
Overview
connections
except
4
actuators" [
105]
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).
Change the schedule to not start both
operation modes at the same moment.
Corrective action
Purge air from the system.
of
electrical
external
(a)
EPRA14~18D + ETBH/X16E
Daikin Altherma 3 H HT W
4P644736-1D – 2023.10
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